Updates and Deletions

The merging documentation specifies how individual releases are merged into compiled releases (the latest version of the contracting process) and versioned releases (the change history for each field), which form part of a record.

The merge routine also allows a publisher to correct a publication error by deleting a field, object or array entry from the compiled release. To do so, a publisher sets the field's value to null in an individual release (more on this below). As such, as a publisher, it is important to never use a null value in an individual release, unless you intend to delete that field. If you don't have a value to assign to a field, simply omit the field from the JSON, or assign an empty value like "", [] or {}. Using null values correctly means that publishers and/or users can create compiled releases reliably.

The following examples show how updates and deletions are reflected in compiled and versioned releases.

Example 1: Updates

A public procurement agency publishes a release to announce an opportunity on January 1, 2016 in which the total estimated value of the procurement is $1,000. On January 31, it publishes a release to expand the description of the procurement. On February 5, it publishes a release to amend the opportunity, in which the total estimated value is increased to $2,000.

The agency decides to award the opportunity to two of the bidders. On March 1, the agency publishes a release to announce that Company A is awarded a contract of $750. On March 3, the agency publishes a release to announce that Company B is awarded a contract of $750.

Through these individual releases, the agency provides real-time data about the contracting process.

In each release, the agency also updates the record, which combines all the releases to date. In the final record:

  • The compiled release contains all the information about the opportunity and awards, using the same schema as a release.

  • The versioned release makes it easy to see how the description and total estimated value changed over time.

{
    "uri": "https://standard.open-contracting.org/examples/releases/ocds-213czf-000-00002-01-tender.json",
    "publishedDate": "2016-01-01T09:30:00Z",
    "publisher": {
        "scheme": "GB-COH",
        "uid": "09506232",
        "name": "Open Data Services Co-operative Limited",
        "uri": "https://standard.open-contracting.org/examples/"
    },
    "license": "http://opendatacommons.org/licenses/pddl/1.0/",
    "publicationPolicy": "https://github.com/open-contracting/sample-data/",
    "version": "1.1",
    "extensions": [],
    "releases": [
        {
            "ocid": "ocds-213czf-000-00002",
            "id": "ocds-213czf-000-00002-01-tender",
            "date": "2016-01-01T09:30:00Z",
            "language": "en",
            "tag": [
                "tender"
            ],
            "initiationType": "tender",
            "parties": [
                {
                    "name": "Open Data Services",
                    "identifier": {
                        "scheme": "GB-COH",
                        "id": "09506232",
                        "legalName": "Open Data Services Co-operative",
                        "uri": "https://opencorporates.com/companies/gb/09506232"
                    },
                    "roles": [
                        "buyer"
                    ],
                    "id": "GB-COH-09506232"
                }
            ],
            "buyer": {
                "id": "GB-COH-09506232",
                "name": "Open Data Services"
            },
            "tender": {
                "id": "ocds-213czf-000-00002-01-tender",
                "title": "Data merging tool",
                "description": "Data merge tool.",
                "status": "active",
                "value": {
                    "amount": 1000,
                    "currency": "USD"
                },
                "procurementMethod": "open",
                "awardCriteria": "bestProposal",
                "submissionMethod": [
                    "electronicSubmission"
                ],
                "tenderPeriod": {
                    "startDate": "2016-01-31T09:00:00Z",
                    "endDate": "2016-02-15T18:00:00Z"
                },
                "awardPeriod": {
                    "startDate": "2016-04-01T00:00:00Z",
                    "endDate": "2016-06-01T23:59:59Z"
                }
            }
        }
    ]
}
{
    "uri": "https://standard.open-contracting.org/examples/releases/ocds-213czf-000-00002-01-tender-update.json",
    "publishedDate": "2016-01-31T09:30:00Z",
    "publisher": {
        "scheme": "GB-COH",
        "uid": "09506232",
        "name": "Open Data Services Co-operative Limited",
        "uri": "https://standard.open-contracting.org/examples/"
    },
    "license": "http://opendatacommons.org/licenses/pddl/1.0/",
    "publicationPolicy": "https://github.com/open-contracting/sample-data/",
    "version": "1.1",
    "extensions": [],
    "releases": [
        {
            "ocid": "ocds-213czf-000-00002",
            "id": "ocds-213czf-000-00002-01-tender-update",
            "date": "2016-01-31T09:30:00Z",
            "language": "en",
            "tag": [
                "tenderUpdate"
            ],
            "initiationType": "tender",
            "parties": [
                {
                    "name": "Open Data Services",
                    "identifier": {
                        "scheme": "GB-COH",
                        "id": "09506232",
                        "legalName": "Open Data Services Co-operative",
                        "uri": "https://opencorporates.com/companies/gb/09506232"
                    },
                    "roles": [
                        "buyer"
                    ],
                    "id": "GB-COH-09506232"
                }
            ],
            "buyer": {
                "id": "GB-COH-09506232",
                "name": "Open Data Services"
            },
            "tender": {
                "id": "ocds-213czf-000-00002-01-tender",
                "title": "Data merging tool",
                "description": "Creation of a data merging tool. The tool should by written in Python. Proposals should be submitted by e-mail.",
                "status": "active",
                "value": {
                    "amount": 1000,
                    "currency": "USD"
                },
                "procurementMethod": "open",
                "awardCriteria": "bestProposal",
                "submissionMethod": [
                    "electronicSubmission"
                ],
                "tenderPeriod": {
                    "startDate": "2016-01-31T09:00:00Z",
                    "endDate": "2016-02-15T18:00:00Z"
                },
                "awardPeriod": {
                    "startDate": "2016-04-01T00:00:00Z",
                    "endDate": "2016-06-01T23:59:59Z"
                }
            }
        }
    ]
}
{
    "uri": "https://standard.open-contracting.org/examples/releases/ocds-213czf-000-00002-01-tender-amendment.json",
    "publishedDate": "2016-02-05T10:30:00Z",
    "publisher": {
        "scheme": "GB-COH",
        "uid": "09506232",
        "name": "Open Data Services Co-operative Limited",
        "uri": "https://standard.open-contracting.org/examples/"
    },
    "license": "http://opendatacommons.org/licenses/pddl/1.0/",
    "publicationPolicy": "https://github.com/open-contracting/sample-data/",
    "version": "1.1",
    "extensions": [],
    "releases": [
        {
            "ocid": "ocds-213czf-000-00002",
            "id": "ocds-213czf-000-00002-01-tender-amendment",
            "date": "2016-02-05T10:30:00Z",
            "language": "en",
            "tag": [
                "tenderAmendment"
            ],
            "initiationType": "tender",
            "parties": [
                {
                    "name": "Open Data Services",
                    "identifier": {
                        "scheme": "GB-COH",
                        "id": "09506232",
                        "legalName": "Open Data Services Co-operative",
                        "uri": "https://opencorporates.com/companies/gb/09506232"
                    },
                    "roles": [
                        "buyer"
                    ],
                    "id": "GB-COH-09506232"
                }
            ],
            "buyer": {
                "id": "GB-COH-09506232",
                "name": "Open Data Services"
            },
            "tender": {
                "id": "ocds-213czf-000-00002-01-tender",
                "title": "Data merging tool",
                "description": "Creation of a data merging tool. The tool should by written in Python. Proposals should be submitted by e-mail.",
                "status": "active",
                "value": {
                    "amount": 2000,
                    "currency": "USD"
                },
                "procurementMethod": "open",
                "awardCriteria": "bestProposal",
                "submissionMethod": [
                    "electronicSubmission"
                ],
                "tenderPeriod": {
                    "startDate": "2016-01-31T09:00:00Z",
                    "endDate": "2016-02-20T18:00:00Z"
                },
                "awardPeriod": {
                    "startDate": "2016-04-01T00:00:00Z",
                    "endDate": "2016-06-01T23:59:59Z"
                },
                "amendments": [
                    {
                        "id": "amendment-1",
                        "date": "2016-02-04T09:30:00Z",
                        "rationale": "Based on feedback from potential bidders, the total budget was increased by $1000, and the deadline extended",
                        "amendsReleaseID": "ocds-213czf-000-00002-01-tender",
                        "releaseID": "ocds-213czf-000-00002-01-tender-amendment"
                    }
                ]
            }
        }
    ]
}
{
    "uri": "https://standard.open-contracting.org/examples/releases/ocds-213czf-000-00002-01-award1.json",
    "publishedDate": "2016-03-01T09:30:00Z",
    "publisher": {
        "scheme": "GB-COH",
        "uid": "09506232",
        "name": "Open Data Services Co-operative Limited",
        "uri": "https://standard.open-contracting.org/examples/"
    },
    "license": "http://opendatacommons.org/licenses/pddl/1.0/",
    "publicationPolicy": "https://github.com/open-contracting/sample-data/",
    "version": "1.1",
    "extensions": [],
    "releases": [
        {
            "ocid": "ocds-213czf-000-00002",
            "id": "ocds-213czf-000-00002-01-award1",
            "date": "2016-03-01T09:30:00Z",
            "language": "en",
            "tag": [
                "award"
            ],
            "initiationType": "tender",
            "parties": [
                {
                    "name": "Open Data Services",
                    "identifier": {
                        "scheme": "GB-COH",
                        "id": "09506232",
                        "legalName": "Open Data Services Co-operative",
                        "uri": "https://opencorporates.com/companies/gb/09506232"
                    },
                    "roles": [
                        "buyer"
                    ],
                    "id": "GB-COH-09506232"
                }
            ],
            "buyer": {
                "id": "GB-COH-09506232",
                "name": "Open Data Services"
            },
            "awards": [
                {
                    "id": "ocds-213czf-000-00002-award-supplier-one",
                    "title": "Award of contract to create the data merging tool.",
                    "description": "Supplier 1 has been commissioned to create the merge tool. A separate contract will be awarded to write the documentation",
                    "status": "active",
                    "date": "2016-03-01T09:30:00Z",
                    "value": {
                        "amount": 750,
                        "currency": "USD"
                    }
                }
            ]
        }
    ]
}
{
    "uri": "https://standard.open-contracting.org/examples/releases/ocds-213czf-000-00002-01-award2.json",
    "publishedDate": "2016-03-03T09:30:00Z",
    "publisher": {
        "scheme": "GB-COH",
        "uid": "09506232",
        "name": "Open Data Services Co-operative Limited",
        "uri": "https://standard.open-contracting.org/examples/"
    },
    "license": "http://opendatacommons.org/licenses/pddl/1.0/",
    "publicationPolicy": "https://github.com/open-contracting/sample-data/",
    "version": "1.1",
    "extensions": [],
    "releases": [
        {
            "ocid": "ocds-213czf-000-00002",
            "id": "ocds-213czf-000-00002-01-award2",
            "date": "2016-03-03T09:30:00Z",
            "language": "en",
            "tag": [
                "award"
            ],
            "initiationType": "tender",
            "parties": [
                {
                    "name": "Open Data Services",
                    "identifier": {
                        "scheme": "GB-COH",
                        "id": "09506232",
                        "legalName": "Open Data Services Co-operative",
                        "uri": "https://opencorporates.com/companies/gb/09506232"
                    },
                    "roles": [
                        "buyer"
                    ],
                    "id": "GB-COH-09506232"
                }
            ],
            "buyer": {
                "id": "GB-COH-09506232",
                "name": "Open Data Services"
            },
            "awards": [
                {
                    "id": "ocds-213czf-000-00002-award-supplier-two",
                    "title": "Award of contract to create the data merging tool.",
                    "description": "Supplier 2 has been commissioned to create the documentation. A separate contract will be awarded to create the tool",
                    "status": "active",
                    "date": "2016-03-03T09:30:00Z",
                    "value": {
                        "amount": 750,
                        "currency": "USD"
                    }
                }
            ]
        }
    ]
}
{
    "uri": "https://standard.open-contracting.org/examples/records/ocds-213czf-000-00002-merge.json",
    "publisher": {
        "scheme": "GB-COH",
        "uid": "09506232",
        "name": "Open Data Services Co-operative Limited",
        "uri": "https://standard.open-contracting.org/examples/"
    },
    "publishedDate": "2016-03-05T13:02:00Z",
    "license": "http://opendatacommons.org/licenses/pddl/1.0/",
    "publicationPolicy": "https://github.com/open-contracting/sample-data/",
    "version": "1.1",
    "packages": [
        "https://standard.open-contracting.org/examples/releases/ocds-213czf-000-00002-01-award1.json",
        "https://standard.open-contracting.org/examples/releases/ocds-213czf-000-00002-01-award2.json",
        "https://standard.open-contracting.org/examples/releases/ocds-213czf-000-00002-01-tender.json",
        "https://standard.open-contracting.org/examples/releases/ocds-213czf-000-00002-01-tender-update.json",
        "https://standard.open-contracting.org/examples/releases/ocds-213czf-000-00002-01-tender-amendment.json"
    ],
    "records": [
        {
            "ocid": "ocds-213czf-000-00002",
            "releases": [
                {
                    "url": "https://standard.open-contracting.org/examples/releases/ocds-213czf-000-00002-01-award1.json#ocds-213czf-000-00002-01-award1",
                    "date": "2016-03-01T09:30:00Z",
                    "tag": [
                        "award"
                    ]
                },
                {
                    "url": "https://standard.open-contracting.org/examples/releases/ocds-213czf-000-00002-01-award2.json#ocds-213czf-000-00002-01-award2",
                    "date": "2016-03-03T09:30:00Z",
                    "tag": [
                        "award"
                    ]
                },
                {
                    "url": "https://standard.open-contracting.org/examples/releases/ocds-213czf-000-00002-01-tender.json#ocds-213czf-000-00002-01-tender",
                    "date": "2016-01-01T09:30:00Z",
                    "tag": [
                        "tender"
                    ]
                },
                {
                    "url": "https://standard.open-contracting.org/examples/releases/ocds-213czf-000-00002-01-tender-update.json#ocds-213czf-000-00002-01-tender-update",
                    "date": "2016-01-31T09:30:00Z",
                    "tag": [
                        "tenderUpdate"
                    ]
                },
                {
                    "url": "https://standard.open-contracting.org/examples/releases/ocds-213czf-000-00002-01-tender-amendment.json#ocds-213czf-000-00002-01-tender-amendment",
                    "date": "2016-02-05T10:30:00Z",
                    "tag": [
                        "tenderAmendment"
                    ]
                }
            ],
            "compiledRelease": {
                "tag": [
                    "compiled"
                ],
                "id": "ocds-213czf-000-00002-2016-03-03T09:30:00Z",
                "date": "2016-03-03T09:30:00Z",
                "ocid": "ocds-213czf-000-00002",
                "language": "en",
                "initiationType": "tender",
                "parties": [
                    {
                        "id": "GB-COH-09506232",
                        "name": "Open Data Services",
                        "identifier": {
                            "scheme": "GB-COH",
                            "id": "09506232",
                            "legalName": "Open Data Services Co-operative",
                            "uri": "https://opencorporates.com/companies/gb/09506232"
                        },
                        "roles": [
                            "buyer"
                        ]
                    }
                ],
                "buyer": {
                    "id": "GB-COH-09506232",
                    "name": "Open Data Services"
                },
                "tender": {
                    "id": "ocds-213czf-000-00002-01-tender",
                    "title": "Data merging tool",
                    "description": "Creation of a data merging tool. The tool should by written in Python. Proposals should be submitted by e-mail.",
                    "status": "active",
                    "value": {
                        "amount": 2000,
                        "currency": "USD"
                    },
                    "procurementMethod": "open",
                    "awardCriteria": "bestProposal",
                    "submissionMethod": [
                        "electronicSubmission"
                    ],
                    "tenderPeriod": {
                        "startDate": "2016-01-31T09:00:00Z",
                        "endDate": "2016-02-20T18:00:00Z"
                    },
                    "awardPeriod": {
                        "startDate": "2016-04-01T00:00:00Z",
                        "endDate": "2016-06-01T23:59:59Z"
                    },
                    "amendments": [
                        {
                            "id": "amendment-1",
                            "date": "2016-02-04T09:30:00Z",
                            "rationale": "Based on feedback from potential bidders, the total budget was increased by $1000, and the deadline extended",
                            "amendsReleaseID": "ocds-213czf-000-00002-01-tender",
                            "releaseID": "ocds-213czf-000-00002-01-tender-amendment"
                        }
                    ]
                },
                "awards": [
                    {
                        "id": "ocds-213czf-000-00002-award-supplier-one",
                        "title": "Award of contract to create the data merging tool.",
                        "description": "Supplier 1 has been commissioned to create the merge tool. A separate contract will be awarded to write the documentation",
                        "status": "active",
                        "date": "2016-03-01T09:30:00Z",
                        "value": {
                            "amount": 750,
                            "currency": "USD"
                        }
                    },
                    {
                        "id": "ocds-213czf-000-00002-award-supplier-two",
                        "title": "Award of contract to create the data merging tool.",
                        "description": "Supplier 2 has been commissioned to create the documentation. A separate contract will be awarded to create the tool",
                        "status": "active",
                        "date": "2016-03-03T09:30:00Z",
                        "value": {
                            "amount": 750,
                            "currency": "USD"
                        }
                    }
                ]
            },
            "versionedRelease": {
                "ocid": "ocds-213czf-000-00002",
                "language": [
                    {
                        "releaseID": "ocds-213czf-000-00002-01-tender",
                        "releaseDate": "2016-01-01T09:30:00Z",
                        "releaseTag": [
                            "tender"
                        ],
                        "value": "en"
                    }
                ],
                "initiationType": [
                    {
                        "releaseID": "ocds-213czf-000-00002-01-tender",
                        "releaseDate": "2016-01-01T09:30:00Z",
                        "releaseTag": [
                            "tender"
                        ],
                        "value": "tender"
                    }
                ],
                "parties": [
                    {
                        "id": "GB-COH-09506232",
                        "name": [
                            {
                                "releaseID": "ocds-213czf-000-00002-01-tender",
                                "releaseDate": "2016-01-01T09:30:00Z",
                                "releaseTag": [
                                    "tender"
                                ],
                                "value": "Open Data Services"
                            }
                        ],
                        "identifier": {
                            "scheme": [
                                {
                                    "releaseID": "ocds-213czf-000-00002-01-tender",
                                    "releaseDate": "2016-01-01T09:30:00Z",
                                    "releaseTag": [
                                        "tender"
                                    ],
                                    "value": "GB-COH"
                                }
                            ],
                            "id": [
                                {
                                    "releaseID": "ocds-213czf-000-00002-01-tender",
                                    "releaseDate": "2016-01-01T09:30:00Z",
                                    "releaseTag": [
                                        "tender"
                                    ],
                                    "value": "09506232"
                                }
                            ],
                            "legalName": [
                                {
                                    "releaseID": "ocds-213czf-000-00002-01-tender",
                                    "releaseDate": "2016-01-01T09:30:00Z",
                                    "releaseTag": [
                                        "tender"
                                    ],
                                    "value": "Open Data Services Co-operative"
                                }
                            ],
                            "uri": [
                                {
                                    "releaseID": "ocds-213czf-000-00002-01-tender",
                                    "releaseDate": "2016-01-01T09:30:00Z",
                                    "releaseTag": [
                                        "tender"
                                    ],
                                    "value": "https://opencorporates.com/companies/gb/09506232"
                                }
                            ]
                        },
                        "roles": [
                            {
                                "releaseID": "ocds-213czf-000-00002-01-tender",
                                "releaseDate": "2016-01-01T09:30:00Z",
                                "releaseTag": [
                                    "tender"
                                ],
                                "value": [
                                    "buyer"
                                ]
                            }
                        ]
                    }
                ],
                "buyer": {
                    "id": [
                        {
                            "releaseID": "ocds-213czf-000-00002-01-tender",
                            "releaseDate": "2016-01-01T09:30:00Z",
                            "releaseTag": [
                                "tender"
                            ],
                            "value": "GB-COH-09506232"
                        }
                    ],
                    "name": [
                        {
                            "releaseID": "ocds-213czf-000-00002-01-tender",
                            "releaseDate": "2016-01-01T09:30:00Z",
                            "releaseTag": [
                                "tender"
                            ],
                            "value": "Open Data Services"
                        }
                    ]
                },
                "tender": {
                    "id": [
                        {
                            "releaseID": "ocds-213czf-000-00002-01-tender",
                            "releaseDate": "2016-01-01T09:30:00Z",
                            "releaseTag": [
                                "tender"
                            ],
                            "value": "ocds-213czf-000-00002-01-tender"
                        }
                    ],
                    "title": [
                        {
                            "releaseID": "ocds-213czf-000-00002-01-tender",
                            "releaseDate": "2016-01-01T09:30:00Z",
                            "releaseTag": [
                                "tender"
                            ],
                            "value": "Data merging tool"
                        }
                    ],
                    "description": [
                        {
                            "releaseID": "ocds-213czf-000-00002-01-tender",
                            "releaseDate": "2016-01-01T09:30:00Z",
                            "releaseTag": [
                                "tender"
                            ],
                            "value": "Data merge tool."
                        },
                        {
                            "releaseID": "ocds-213czf-000-00002-01-tender-update",
                            "releaseDate": "2016-01-31T09:30:00Z",
                            "releaseTag": [
                                "tenderUpdate"
                            ],
                            "value": "Creation of a data merging tool. The tool should by written in Python. Proposals should be submitted by e-mail."
                        }
                    ],
                    "status": [
                        {
                            "releaseID": "ocds-213czf-000-00002-01-tender",
                            "releaseDate": "2016-01-01T09:30:00Z",
                            "releaseTag": [
                                "tender"
                            ],
                            "value": "active"
                        }
                    ],
                    "value": {
                        "amount": [
                            {
                                "releaseID": "ocds-213czf-000-00002-01-tender",
                                "releaseDate": "2016-01-01T09:30:00Z",
                                "releaseTag": [
                                    "tender"
                                ],
                                "value": 1000
                            },
                            {
                                "releaseID": "ocds-213czf-000-00002-01-tender-amendment",
                                "releaseDate": "2016-02-05T10:30:00Z",
                                "releaseTag": [
                                    "tenderAmendment"
                                ],
                                "value": 2000
                            }
                        ],
                        "currency": [
                            {
                                "releaseID": "ocds-213czf-000-00002-01-tender",
                                "releaseDate": "2016-01-01T09:30:00Z",
                                "releaseTag": [
                                    "tender"
                                ],
                                "value": "USD"
                            }
                        ]
                    },
                    "procurementMethod": [
                        {
                            "releaseID": "ocds-213czf-000-00002-01-tender",
                            "releaseDate": "2016-01-01T09:30:00Z",
                            "releaseTag": [
                                "tender"
                            ],
                            "value": "open"
                        }
                    ],
                    "awardCriteria": [
                        {
                            "releaseID": "ocds-213czf-000-00002-01-tender",
                            "releaseDate": "2016-01-01T09:30:00Z",
                            "releaseTag": [
                                "tender"
                            ],
                            "value": "bestProposal"
                        }
                    ],
                    "submissionMethod": [
                        {
                            "releaseID": "ocds-213czf-000-00002-01-tender",
                            "releaseDate": "2016-01-01T09:30:00Z",
                            "releaseTag": [
                                "tender"
                            ],
                            "value": [
                                "electronicSubmission"
                            ]
                        }
                    ],
                    "tenderPeriod": {
                        "startDate": [
                            {
                                "releaseID": "ocds-213czf-000-00002-01-tender",
                                "releaseDate": "2016-01-01T09:30:00Z",
                                "releaseTag": [
                                    "tender"
                                ],
                                "value": "2016-01-31T09:00:00Z"
                            }
                        ],
                        "endDate": [
                            {
                                "releaseID": "ocds-213czf-000-00002-01-tender",
                                "releaseDate": "2016-01-01T09:30:00Z",
                                "releaseTag": [
                                    "tender"
                                ],
                                "value": "2016-02-15T18:00:00Z"
                            },
                            {
                                "releaseID": "ocds-213czf-000-00002-01-tender-amendment",
                                "releaseDate": "2016-02-05T10:30:00Z",
                                "releaseTag": [
                                    "tenderAmendment"
                                ],
                                "value": "2016-02-20T18:00:00Z"
                            }
                        ]
                    },
                    "awardPeriod": {
                        "startDate": [
                            {
                                "releaseID": "ocds-213czf-000-00002-01-tender",
                                "releaseDate": "2016-01-01T09:30:00Z",
                                "releaseTag": [
                                    "tender"
                                ],
                                "value": "2016-04-01T00:00:00Z"
                            }
                        ],
                        "endDate": [
                            {
                                "releaseID": "ocds-213czf-000-00002-01-tender",
                                "releaseDate": "2016-01-01T09:30:00Z",
                                "releaseTag": [
                                    "tender"
                                ],
                                "value": "2016-06-01T23:59:59Z"
                            }
                        ]
                    },
                    "amendments": [
                        {
                            "id": "amendment-1",
                            "date": [
                                {
                                    "releaseID": "ocds-213czf-000-00002-01-tender-amendment",
                                    "releaseDate": "2016-02-05T10:30:00Z",
                                    "releaseTag": [
                                        "tenderAmendment"
                                    ],
                                    "value": "2016-02-04T09:30:00Z"
                                }
                            ],
                            "rationale": [
                                {
                                    "releaseID": "ocds-213czf-000-00002-01-tender-amendment",
                                    "releaseDate": "2016-02-05T10:30:00Z",
                                    "releaseTag": [
                                        "tenderAmendment"
                                    ],
                                    "value": "Based on feedback from potential bidders, the total budget was increased by $1000, and the deadline extended"
                                }
                            ],
                            "amendsReleaseID": [
                                {
                                    "releaseID": "ocds-213czf-000-00002-01-tender-amendment",
                                    "releaseDate": "2016-02-05T10:30:00Z",
                                    "releaseTag": [
                                        "tenderAmendment"
                                    ],
                                    "value": "ocds-213czf-000-00002-01-tender"
                                }
                            ],
                            "releaseID": [
                                {
                                    "releaseID": "ocds-213czf-000-00002-01-tender-amendment",
                                    "releaseDate": "2016-02-05T10:30:00Z",
                                    "releaseTag": [
                                        "tenderAmendment"
                                    ],
                                    "value": "ocds-213czf-000-00002-01-tender-amendment"
                                }
                            ]
                        }
                    ]
                },
                "awards": [
                    {
                        "id": "ocds-213czf-000-00002-award-supplier-one",
                        "title": [
                            {
                                "releaseID": "ocds-213czf-000-00002-01-award1",
                                "releaseDate": "2016-03-01T09:30:00Z",
                                "releaseTag": [
                                    "award"
                                ],
                                "value": "Award of contract to create the data merging tool."
                            }
                        ],
                        "description": [
                            {
                                "releaseID": "ocds-213czf-000-00002-01-award1",
                                "releaseDate": "2016-03-01T09:30:00Z",
                                "releaseTag": [
                                    "award"
                                ],
                                "value": "Supplier 1 has been commissioned to create the merge tool. A separate contract will be awarded to write the documentation"
                            }
                        ],
                        "status": [
                            {
                                "releaseID": "ocds-213czf-000-00002-01-award1",
                                "releaseDate": "2016-03-01T09:30:00Z",
                                "releaseTag": [
                                    "award"
                                ],
                                "value": "active"
                            }
                        ],
                        "date": [
                            {
                                "releaseID": "ocds-213czf-000-00002-01-award1",
                                "releaseDate": "2016-03-01T09:30:00Z",
                                "releaseTag": [
                                    "award"
                                ],
                                "value": "2016-03-01T09:30:00Z"
                            }
                        ],
                        "value": {
                            "amount": [
                                {
                                    "releaseID": "ocds-213czf-000-00002-01-award1",
                                    "releaseDate": "2016-03-01T09:30:00Z",
                                    "releaseTag": [
                                        "award"
                                    ],
                                    "value": 750
                                }
                            ],
                            "currency": [
                                {
                                    "releaseID": "ocds-213czf-000-00002-01-award1",
                                    "releaseDate": "2016-03-01T09:30:00Z",
                                    "releaseTag": [
                                        "award"
                                    ],
                                    "value": "USD"
                                }
                            ]
                        }
                    },
                    {
                        "id": "ocds-213czf-000-00002-award-supplier-two",
                        "title": [
                            {
                                "releaseID": "ocds-213czf-000-00002-01-award2",
                                "releaseDate": "2016-03-03T09:30:00Z",
                                "releaseTag": [
                                    "award"
                                ],
                                "value": "Award of contract to create the data merging tool."
                            }
                        ],
                        "description": [
                            {
                                "releaseID": "ocds-213czf-000-00002-01-award2",
                                "releaseDate": "2016-03-03T09:30:00Z",
                                "releaseTag": [
                                    "award"
                                ],
                                "value": "Supplier 2 has been commissioned to create the documentation. A separate contract will be awarded to create the tool"
                            }
                        ],
                        "status": [
                            {
                                "releaseID": "ocds-213czf-000-00002-01-award2",
                                "releaseDate": "2016-03-03T09:30:00Z",
                                "releaseTag": [
                                    "award"
                                ],
                                "value": "active"
                            }
                        ],
                        "date": [
                            {
                                "releaseID": "ocds-213czf-000-00002-01-award2",
                                "releaseDate": "2016-03-03T09:30:00Z",
                                "releaseTag": [
                                    "award"
                                ],
                                "value": "2016-03-03T09:30:00Z"
                            }
                        ],
                        "value": {
                            "amount": [
                                {
                                    "releaseID": "ocds-213czf-000-00002-01-award2",
                                    "releaseDate": "2016-03-03T09:30:00Z",
                                    "releaseTag": [
                                        "award"
                                    ],
                                    "value": 750
                                }
                            ],
                            "currency": [
                                {
                                    "releaseID": "ocds-213czf-000-00002-01-award2",
                                    "releaseDate": "2016-03-03T09:30:00Z",
                                    "releaseTag": [
                                        "award"
                                    ],
                                    "value": "USD"
                                }
                            ]
                        }
                    }
                ]
            }
        }
    ]
}

Example 2: Deletion of fields and objects

Fields

A government agency in Colombia publishes a procurement opportunity, including information about the tender, as shown below.

After a few days, the officer in charge notices that the description of the tender is a duplication of the tender title and decides to leave the description field blank, judging that the tender/title field has all the information needed. A release with a 'tenderUpdate' tag is published, and the record for the process is updated.

In the final record, both the compiled and versioned releases show the changes. The tender/description field has disappeared from the compiledRelease, and the versionedRelease shows both its previous value and the null value used to delete the field. The entry with the null value can be used to determine when the field was deleted.

{
    "uri": "https://standard.open-contracting.org/examples/releases/ocds-k50g02-13-9-368828-tender.json",
    "publisher": {
        "name": "Colombia Compra Eficiente"
    },
    "publishedDate": "2013-07-28T09:40:10.000Z",
    "version": "1.1",
    "releases": [
        {
            "date": "2013-07-28T09:40:10.000Z",
            "language": "es",
            "ocid": "ocds-k50g02-13-9-368828",
            "id": "13-9-368828-tender",
            "tag": [
                "tender"
            ],
            "initiationType": "tender",
            "parties": [
                {
                    "name": "INSTITUTO NACIONAL PENITENCIARIO Y CARCELARIO (INPEC)",
                    "roles": [
                        "procuringEntity",
                        "buyer"
                    ],
                    "address": {
                        "countryName": "COLOMBIA",
                        "region": "Bogot\u00e1 D.C.",
                        "streetAddress": "Calle 26 No. 27-48",
                        "locality": "Bogot\u00e1 D.C."
                    },
                    "contactPoint": {
                        "email": "comando.ecarmeroguayabal@inpec.gov.co",
                        "telephone": "(8) 2530814",
                        "name": "DEISY ALEXANDRA GARAY"
                    },
                    "identifier": {
                        "scheme": "CO-RUE",
                        "id": "800215546",
                        "legalName": "INSTITUTO NACIONAL PENITENCIARIO Y CARCELARIO (INPEC)"
                    },
                    "id": "800215546"
                }
            ],
            "buyer": {
                "id": "800215546",
                "name": "INSTITUTO NACIONAL PENITENCIARIO Y CARCELARIO (INPEC)"
            },
            "tender": {
                "status": "active",
                "description": "ADQUISICION DE COLCHONETAS PARA LA DOTACION DESTINADOS A LA POBLACION INTERNA DEL EPMSC ARMERO GUAYABAL TOLIMA",
                "title": "ADQUISICION DE COLCHONETAS PARA LA DOTACION DESTINADOS A LA POBLACION INTERNA DEL EPMSC ARMERO GUAYABAL TOLIMA",
                "procurementMethod": "open",
                "procurementMethodDetails": "Subasta",
                "value": {
                    "amount": 6725000
                },
                "tenderPeriod": {
                    "startDate": "2013-08-01T09:00:00.000Z",
                    "durationInDays": 15
                },
                "submissionMethod": [
                    "inPerson"
                ],
                "submissionMethodDetails": "Municipio obtenci\u00f3n: Guayabal Municipio entrega: Guayabal Municipio ejecuci\u00f3n: No definido Lugar aclaraciones: No definido",
                "procuringEntity": {
                    "id": "800215546",
                    "name": "INSTITUTO NACIONAL PENITENCIARIO Y CARCELARIO (INPEC)"
                },
                "id": "13-9-368828"
            }
        }
    ]
}
{
    "uri": "https://standard.open-contracting.org/examples/releases/ocds-k50g02-13-9-368828-tenderUpdate.json",
    "publisher": {
        "name": "Colombia Compra Eficiente"
    },
    "publishedDate": "2013-07-30T09:00:10.000Z",
    "version": "1.1",
    "releases": [
        {
            "date": "2013-07-30T09:00:10.000Z",
            "language": "es",
            "ocid": "ocds-k50g02-13-9-368828",
            "id": "13-9-368828-tenderUpdate",
            "tag": [
                "tenderUpdate"
            ],
            "initiationType": "tender",
            "parties": [
                {
                    "name": "INSTITUTO NACIONAL PENITENCIARIO Y CARCELARIO (INPEC)",
                    "roles": [
                        "procuringEntity",
                        "buyer"
                    ],
                    "address": {
                        "countryName": "COLOMBIA",
                        "region": "Bogot\u00e1 D.C.",
                        "streetAddress": "Calle 26 No. 27-48",
                        "locality": "Bogot\u00e1 D.C."
                    },
                    "contactPoint": {
                        "email": "comando.ecarmeroguayabal@inpec.gov.co",
                        "telephone": "(8) 2530814",
                        "name": "DEISY ALEXANDRA GARAY"
                    },
                    "identifier": {
                        "scheme": "CO-RUE",
                        "id": "800215546",
                        "legalName": "INSTITUTO NACIONAL PENITENCIARIO Y CARCELARIO (INPEC)"
                    },
                    "id": "800215546"
                }
            ],
            "buyer": {
                "id": "800215546",
                "name": "INSTITUTO NACIONAL PENITENCIARIO Y CARCELARIO (INPEC)"
            },
            "tender": {
                "status": "active",
                "description": null,
                "title": "ADQUISICION DE COLCHONETAS PARA LA DOTACION DESTINADOS A LA POBLACION INTERNA DEL EPMSC ARMERO GUAYABAL TOLIMA",
                "procurementMethod": "open",
                "procurementMethodDetails": "Subasta",
                "value": {
                    "amount": 6725000
                },
                "tenderPeriod": {
                    "startDate": "2013-08-01T09:00:00.000Z",
                    "durationInDays": 15
                },
                "submissionMethod": [
                    "inPerson"
                ],
                "submissionMethodDetails": "Municipio obtenci\u00f3n: Guayabal Municipio entrega: Guayabal Municipio ejecuci\u00f3n: No definido Lugar aclaraciones: No definido",
                "procuringEntity": {
                    "id": "800215546",
                    "name": "INSTITUTO NACIONAL PENITENCIARIO Y CARCELARIO (INPEC)"
                },
                "id": "13-9-368828"
            }
        }
    ]
}
{
    "uri": "",
    "publisher": {
        "name": "Colombia Compra Eficiente"
    },
    "publishedDate": "2013-07-30T09:00:10.000Z",
    "version": "1.1",
    "packages": [
        "https://standard.open-contracting.org/examples/releases/ocds-k50g02-13-9-368828-tenderUpdate.json",
        "https://standard.open-contracting.org/examples/releases/ocds-k50g02-13-9-368828-tender.json"
    ],
    "records": [
        {
            "ocid": "ocds-k50g02-13-9-368828",
            "releases": [
                {
                    "date": "2013-07-30T09:00:10.000Z",
                    "language": "es",
                    "ocid": "ocds-k50g02-13-9-368828",
                    "id": "13-9-368828-tenderUpdate",
                    "tag": [
                        "tenderUpdate"
                    ],
                    "initiationType": "tender",
                    "parties": [
                        {
                            "name": "INSTITUTO NACIONAL PENITENCIARIO Y CARCELARIO (INPEC)",
                            "roles": [
                                "procuringEntity",
                                "buyer"
                            ],
                            "address": {
                                "countryName": "COLOMBIA",
                                "region": "Bogot\u00e1 D.C.",
                                "streetAddress": "Calle 26 No. 27-48",
                                "locality": "Bogot\u00e1 D.C."
                            },
                            "contactPoint": {
                                "email": "comando.ecarmeroguayabal@inpec.gov.co",
                                "telephone": "(8) 2530814",
                                "name": "DEISY ALEXANDRA GARAY"
                            },
                            "identifier": {
                                "scheme": "CO-RUE",
                                "id": "800215546",
                                "legalName": "INSTITUTO NACIONAL PENITENCIARIO Y CARCELARIO (INPEC)"
                            },
                            "id": "800215546"
                        }
                    ],
                    "buyer": {
                        "id": "800215546",
                        "name": "INSTITUTO NACIONAL PENITENCIARIO Y CARCELARIO (INPEC)"
                    },
                    "tender": {
                        "status": "active",
                        "description": null,
                        "title": "ADQUISICION DE COLCHONETAS PARA LA DOTACION DESTINADOS A LA POBLACION INTERNA DEL EPMSC ARMERO GUAYABAL TOLIMA",
                        "procurementMethod": "open",
                        "procurementMethodDetails": "Subasta",
                        "value": {
                            "amount": 6725000
                        },
                        "tenderPeriod": {
                            "startDate": "2013-08-01T09:00:00.000Z",
                            "durationInDays": 15
                        },
                        "submissionMethod": [
                            "inPerson"
                        ],
                        "submissionMethodDetails": "Municipio obtenci\u00f3n: Guayabal Municipio entrega: Guayabal Municipio ejecuci\u00f3n: No definido Lugar aclaraciones: No definido",
                        "procuringEntity": {
                            "id": "800215546",
                            "name": "INSTITUTO NACIONAL PENITENCIARIO Y CARCELARIO (INPEC)"
                        },
                        "id": "13-9-368828"
                    }
                },
                {
                    "date": "2013-07-28T09:40:10.000Z",
                    "language": "es",
                    "ocid": "ocds-k50g02-13-9-368828",
                    "id": "13-9-368828-tender",
                    "tag": [
                        "tender"
                    ],
                    "initiationType": "tender",
                    "parties": [
                        {
                            "name": "INSTITUTO NACIONAL PENITENCIARIO Y CARCELARIO (INPEC)",
                            "roles": [
                                "procuringEntity",
                                "buyer"
                            ],
                            "address": {
                                "countryName": "COLOMBIA",
                                "region": "Bogot\u00e1 D.C.",
                                "streetAddress": "Calle 26 No. 27-48",
                                "locality": "Bogot\u00e1 D.C."
                            },
                            "contactPoint": {
                                "email": "comando.ecarmeroguayabal@inpec.gov.co",
                                "telephone": "(8) 2530814",
                                "name": "DEISY ALEXANDRA GARAY"
                            },
                            "identifier": {
                                "scheme": "CO-RUE",
                                "id": "800215546",
                                "legalName": "INSTITUTO NACIONAL PENITENCIARIO Y CARCELARIO (INPEC)"
                            },
                            "id": "800215546"
                        }
                    ],
                    "buyer": {
                        "id": "800215546",
                        "name": "INSTITUTO NACIONAL PENITENCIARIO Y CARCELARIO (INPEC)"
                    },
                    "tender": {
                        "status": "active",
                        "description": "ADQUISICION DE COLCHONETAS PARA LA DOTACION DESTINADOS A LA POBLACION INTERNA DEL EPMSC ARMERO GUAYABAL TOLIMA",
                        "title": "ADQUISICION DE COLCHONETAS PARA LA DOTACION DESTINADOS A LA POBLACION INTERNA DEL EPMSC ARMERO GUAYABAL TOLIMA",
                        "procurementMethod": "open",
                        "procurementMethodDetails": "Subasta",
                        "value": {
                            "amount": 6725000
                        },
                        "tenderPeriod": {
                            "startDate": "2013-08-01T09:00:00.000Z",
                            "durationInDays": 15
                        },
                        "submissionMethod": [
                            "inPerson"
                        ],
                        "submissionMethodDetails": "Municipio obtenci\u00f3n: Guayabal Municipio entrega: Guayabal Municipio ejecuci\u00f3n: No definido Lugar aclaraciones: No definido",
                        "procuringEntity": {
                            "id": "800215546",
                            "name": "INSTITUTO NACIONAL PENITENCIARIO Y CARCELARIO (INPEC)"
                        },
                        "id": "13-9-368828"
                    }
                }
            ],
            "compiledRelease": {
                "tag": [
                    "compiled"
                ],
                "id": "ocds-k50g02-13-9-368828-2013-07-30T09:00:10.000Z",
                "date": "2013-07-30T09:00:10.000Z",
                "ocid": "ocds-k50g02-13-9-368828",
                "language": "es",
                "initiationType": "tender",
                "parties": [
                    {
                        "id": "800215546",
                        "name": "INSTITUTO NACIONAL PENITENCIARIO Y CARCELARIO (INPEC)",
                        "roles": [
                            "procuringEntity",
                            "buyer"
                        ],
                        "address": {
                            "countryName": "COLOMBIA",
                            "region": "Bogot\u00e1 D.C.",
                            "streetAddress": "Calle 26 No. 27-48",
                            "locality": "Bogot\u00e1 D.C."
                        },
                        "contactPoint": {
                            "email": "comando.ecarmeroguayabal@inpec.gov.co",
                            "telephone": "(8) 2530814",
                            "name": "DEISY ALEXANDRA GARAY"
                        },
                        "identifier": {
                            "scheme": "CO-RUE",
                            "id": "800215546",
                            "legalName": "INSTITUTO NACIONAL PENITENCIARIO Y CARCELARIO (INPEC)"
                        }
                    }
                ],
                "buyer": {
                    "id": "800215546",
                    "name": "INSTITUTO NACIONAL PENITENCIARIO Y CARCELARIO (INPEC)"
                },
                "tender": {
                    "status": "active",
                    "title": "ADQUISICION DE COLCHONETAS PARA LA DOTACION DESTINADOS A LA POBLACION INTERNA DEL EPMSC ARMERO GUAYABAL TOLIMA",
                    "procurementMethod": "open",
                    "procurementMethodDetails": "Subasta",
                    "value": {
                        "amount": 6725000
                    },
                    "tenderPeriod": {
                        "startDate": "2013-08-01T09:00:00.000Z",
                        "durationInDays": 15
                    },
                    "submissionMethod": [
                        "inPerson"
                    ],
                    "submissionMethodDetails": "Municipio obtenci\u00f3n: Guayabal Municipio entrega: Guayabal Municipio ejecuci\u00f3n: No definido Lugar aclaraciones: No definido",
                    "procuringEntity": {
                        "id": "800215546",
                        "name": "INSTITUTO NACIONAL PENITENCIARIO Y CARCELARIO (INPEC)"
                    },
                    "id": "13-9-368828"
                }
            },
            "versionedRelease": {
                "ocid": "ocds-k50g02-13-9-368828",
                "language": [
                    {
                        "releaseID": "13-9-368828-tender",
                        "releaseDate": "2013-07-28T09:40:10.000Z",
                        "releaseTag": [
                            "tender"
                        ],
                        "value": "es"
                    }
                ],
                "initiationType": [
                    {
                        "releaseID": "13-9-368828-tender",
                        "releaseDate": "2013-07-28T09:40:10.000Z",
                        "releaseTag": [
                            "tender"
                        ],
                        "value": "tender"
                    }
                ],
                "parties": [
                    {
                        "id": "800215546",
                        "name": [
                            {
                                "releaseID": "13-9-368828-tender",
                                "releaseDate": "2013-07-28T09:40:10.000Z",
                                "releaseTag": [
                                    "tender"
                                ],
                                "value": "INSTITUTO NACIONAL PENITENCIARIO Y CARCELARIO (INPEC)"
                            }
                        ],
                        "roles": [
                            {
                                "releaseID": "13-9-368828-tender",
                                "releaseDate": "2013-07-28T09:40:10.000Z",
                                "releaseTag": [
                                    "tender"
                                ],
                                "value": [
                                    "procuringEntity",
                                    "buyer"
                                ]
                            }
                        ],
                        "address": {
                            "countryName": [
                                {
                                    "releaseID": "13-9-368828-tender",
                                    "releaseDate": "2013-07-28T09:40:10.000Z",
                                    "releaseTag": [
                                        "tender"
                                    ],
                                    "value": "COLOMBIA"
                                }
                            ],
                            "region": [
                                {
                                    "releaseID": "13-9-368828-tender",
                                    "releaseDate": "2013-07-28T09:40:10.000Z",
                                    "releaseTag": [
                                        "tender"
                                    ],
                                    "value": "Bogot\u00e1 D.C."
                                }
                            ],
                            "streetAddress": [
                                {
                                    "releaseID": "13-9-368828-tender",
                                    "releaseDate": "2013-07-28T09:40:10.000Z",
                                    "releaseTag": [
                                        "tender"
                                    ],
                                    "value": "Calle 26 No. 27-48"
                                }
                            ],
                            "locality": [
                                {
                                    "releaseID": "13-9-368828-tender",
                                    "releaseDate": "2013-07-28T09:40:10.000Z",
                                    "releaseTag": [
                                        "tender"
                                    ],
                                    "value": "Bogot\u00e1 D.C."
                                }
                            ]
                        },
                        "contactPoint": {
                            "email": [
                                {
                                    "releaseID": "13-9-368828-tender",
                                    "releaseDate": "2013-07-28T09:40:10.000Z",
                                    "releaseTag": [
                                        "tender"
                                    ],
                                    "value": "comando.ecarmeroguayabal@inpec.gov.co"
                                }
                            ],
                            "telephone": [
                                {
                                    "releaseID": "13-9-368828-tender",
                                    "releaseDate": "2013-07-28T09:40:10.000Z",
                                    "releaseTag": [
                                        "tender"
                                    ],
                                    "value": "(8) 2530814"
                                }
                            ],
                            "name": [
                                {
                                    "releaseID": "13-9-368828-tender",
                                    "releaseDate": "2013-07-28T09:40:10.000Z",
                                    "releaseTag": [
                                        "tender"
                                    ],
                                    "value": "DEISY ALEXANDRA GARAY"
                                }
                            ]
                        },
                        "identifier": {
                            "scheme": [
                                {
                                    "releaseID": "13-9-368828-tender",
                                    "releaseDate": "2013-07-28T09:40:10.000Z",
                                    "releaseTag": [
                                        "tender"
                                    ],
                                    "value": "CO-RUE"
                                }
                            ],
                            "id": [
                                {
                                    "releaseID": "13-9-368828-tender",
                                    "releaseDate": "2013-07-28T09:40:10.000Z",
                                    "releaseTag": [
                                        "tender"
                                    ],
                                    "value": "800215546"
                                }
                            ],
                            "legalName": [
                                {
                                    "releaseID": "13-9-368828-tender",
                                    "releaseDate": "2013-07-28T09:40:10.000Z",
                                    "releaseTag": [
                                        "tender"
                                    ],
                                    "value": "INSTITUTO NACIONAL PENITENCIARIO Y CARCELARIO (INPEC)"
                                }
                            ]
                        }
                    }
                ],
                "buyer": {
                    "id": [
                        {
                            "releaseID": "13-9-368828-tender",
                            "releaseDate": "2013-07-28T09:40:10.000Z",
                            "releaseTag": [
                                "tender"
                            ],
                            "value": "800215546"
                        }
                    ],
                    "name": [
                        {
                            "releaseID": "13-9-368828-tender",
                            "releaseDate": "2013-07-28T09:40:10.000Z",
                            "releaseTag": [
                                "tender"
                            ],
                            "value": "INSTITUTO NACIONAL PENITENCIARIO Y CARCELARIO (INPEC)"
                        }
                    ]
                },
                "tender": {
                    "status": [
                        {
                            "releaseID": "13-9-368828-tender",
                            "releaseDate": "2013-07-28T09:40:10.000Z",
                            "releaseTag": [
                                "tender"
                            ],
                            "value": "active"
                        }
                    ],
                    "description": [
                        {
                            "releaseID": "13-9-368828-tender",
                            "releaseDate": "2013-07-28T09:40:10.000Z",
                            "releaseTag": [
                                "tender"
                            ],
                            "value": "ADQUISICION DE COLCHONETAS PARA LA DOTACION DESTINADOS A LA POBLACION INTERNA DEL EPMSC ARMERO GUAYABAL TOLIMA"
                        },
                        {
                            "releaseID": "13-9-368828-tenderUpdate",
                            "releaseDate": "2013-07-30T09:00:10.000Z",
                            "releaseTag": [
                                "tenderUpdate"
                            ],
                            "value": null
                        }
                    ],
                    "title": [
                        {
                            "releaseID": "13-9-368828-tender",
                            "releaseDate": "2013-07-28T09:40:10.000Z",
                            "releaseTag": [
                                "tender"
                            ],
                            "value": "ADQUISICION DE COLCHONETAS PARA LA DOTACION DESTINADOS A LA POBLACION INTERNA DEL EPMSC ARMERO GUAYABAL TOLIMA"
                        }
                    ],
                    "procurementMethod": [
                        {
                            "releaseID": "13-9-368828-tender",
                            "releaseDate": "2013-07-28T09:40:10.000Z",
                            "releaseTag": [
                                "tender"
                            ],
                            "value": "open"
                        }
                    ],
                    "procurementMethodDetails": [
                        {
                            "releaseID": "13-9-368828-tender",
                            "releaseDate": "2013-07-28T09:40:10.000Z",
                            "releaseTag": [
                                "tender"
                            ],
                            "value": "Subasta"
                        }
                    ],
                    "value": {
                        "amount": [
                            {
                                "releaseID": "13-9-368828-tender",
                                "releaseDate": "2013-07-28T09:40:10.000Z",
                                "releaseTag": [
                                    "tender"
                                ],
                                "value": 6725000
                            }
                        ]
                    },
                    "tenderPeriod": {
                        "startDate": [
                            {
                                "releaseID": "13-9-368828-tender",
                                "releaseDate": "2013-07-28T09:40:10.000Z",
                                "releaseTag": [
                                    "tender"
                                ],
                                "value": "2013-08-01T09:00:00.000Z"
                            }
                        ],
                        "durationInDays": [
                            {
                                "releaseID": "13-9-368828-tender",
                                "releaseDate": "2013-07-28T09:40:10.000Z",
                                "releaseTag": [
                                    "tender"
                                ],
                                "value": 15
                            }
                        ]
                    },
                    "submissionMethod": [
                        {
                            "releaseID": "13-9-368828-tender",
                            "releaseDate": "2013-07-28T09:40:10.000Z",
                            "releaseTag": [
                                "tender"
                            ],
                            "value": [
                                "inPerson"
                            ]
                        }
                    ],
                    "submissionMethodDetails": [
                        {
                            "releaseID": "13-9-368828-tender",
                            "releaseDate": "2013-07-28T09:40:10.000Z",
                            "releaseTag": [
                                "tender"
                            ],
                            "value": "Municipio obtenci\u00f3n: Guayabal Municipio entrega: Guayabal Municipio ejecuci\u00f3n: No definido Lugar aclaraciones: No definido"
                        }
                    ],
                    "procuringEntity": {
                        "id": [
                            {
                                "releaseID": "13-9-368828-tender",
                                "releaseDate": "2013-07-28T09:40:10.000Z",
                                "releaseTag": [
                                    "tender"
                                ],
                                "value": "800215546"
                            }
                        ],
                        "name": [
                            {
                                "releaseID": "13-9-368828-tender",
                                "releaseDate": "2013-07-28T09:40:10.000Z",
                                "releaseTag": [
                                    "tender"
                                ],
                                "value": "INSTITUTO NACIONAL PENITENCIARIO Y CARCELARIO (INPEC)"
                            }
                        ]
                    },
                    "id": [
                        {
                            "releaseID": "13-9-368828-tender",
                            "releaseDate": "2013-07-28T09:40:10.000Z",
                            "releaseTag": [
                                "tender"
                            ],
                            "value": "13-9-368828"
                        }
                    ]
                }
            }
        }
    ]
}

Objects

Another government agency in Colombia publishes a new procurement opportunity. Details are provided in an OCDS release, as shown below.

A few days after releasing the tender notice, the government agency receives feedback for potential bidders, and they realize that the estimated contract period set for the tender could be infeasible. They decide to instead negotiate the contract period with the awarded supplier, and they remove the contract period from the opportunity to avoid confusing potential bidders.

A release with a 'tenderAmendment' tag is published, in which both the startDate and endDate of the contractPeriod block have been set to null. Also, an amendments block is provided to explain the changes.

The final record is shown below. Note that the fields in the contractPeriod block have disappeared in the compiledRelease, and the versionedRelease contains the previous values.

{
    "uri": "https://standard.open-contracting.org/examples/releases/ocds-k50g02-11-13-651832-tender.json",
    "publisher": {
        "name": "Colombia Compra Eficiente"
    },
    "publishedDate": "2011-10-14T16:26:49.000Z",
    "version": "1.1",
    "releases": [
        {
            "date": "2011-10-14T16:26:49.000Z",
            "language": "es",
            "ocid": "ocds-k50g02-11-13-651832",
            "id": "11-13-651832-tender",
            "tag": [
                "tender"
            ],
            "initiationType": "tender",
            "parties": [
                {
                    "name": "CAUCA - ALCALD\u00cdA MUNICIPIO DE MERCADERES",
                    "roles": [
                        "procuringEntity",
                        "buyer"
                    ],
                    "address": {
                        "countryName": "COLOMBIA",
                        "region": "Cauca",
                        "locality": "Mercaderes"
                    },
                    "contactPoint": {
                        "email": "derazo@example.com",
                        "telephone": "152 2158746",
                        "name": "DIEGO EDUARDO ERAZO GUERRERO"
                    },
                    "identifier": {
                        "scheme": "CO-RUE",
                        "id": "890701933",
                        "legalName": "CAUCA - ALCALD\u00cdA MUNICIPIO DE MERCADERES"
                    },
                    "id": "890701933"
                }
            ],
            "buyer": {
                "id": "890701933",
                "name": "CAUCA - ALCALD\u00cdA MUNICIPIO DE MERCADERES"
            },
            "tender": {
                "id": "11-13-651832",
                "status": "active",
                "description": "CONSTRUCCI\u00d3N DE OBRAS DE REHABILITACI\u00d3N Y MANTENIMIENTO DE LA V\u00cdA CARRETEABLE: VEREDA CURACAS-VEREDA LA MONJITA, EN UNA EXTENSI\u00d3N DE SEIS (06) KIL\u00d3METROS EN MUNICIPIO DE MERCADERES CAUCA.",
                "procurementMethod": "open",
                "submissionMethodDetails": "Municipio obtenci\u00f3n: Mercaderes, Municipio entrega: Mercaderes, Municipio ejecuci\u00f3n: No definido, Lugar aclaraciones: No definido",
                "procurementMethodDetails": "Contrataci\u00f3n M\u00ednima Cuant\u00eda",
                "value": {
                    "amount": 5000000
                },
                "submissionMethod": [
                    "inPerson"
                ],
                "procuringEntity": {
                    "id": "890701933",
                    "name": "CAUCA - ALCALD\u00cdA MUNICIPIO DE MERCADERES"
                },
                "procurementMethodRationale": "Ninguna",
                "tenderPeriod": {
                    "startDate": "2011-10-14T16:22:00.000Z",
                    "endDate": "2011-10-20T00:00:00.000Z"
                },
                "contractPeriod": {
                    "startDate": "2011-11-20T09:00:00.000Z",
                    "endDate": "2012-01-31T17:00:00.000Z"
                }
            }
        }
    ]
}
{
    "uri": "https://standard.open-contracting.org/examples/releases/ocds-k50g02-11-13-651832-tenderUpdate.json",
    "publisher": {
        "name": "Colombia Compra Eficiente"
    },
    "publishedDate": "2011-10-18T08:54:21.000Z",
    "version": "1.1",
    "releases": [
        {
            "date": "2011-10-18T08:54:21.000Z",
            "language": "es",
            "ocid": "ocds-k50g02-11-13-651832",
            "id": "11-13-651832-tenderUpdate",
            "tag": [
                "tenderAmendment"
            ],
            "initiationType": "tender",
            "parties": [
                {
                    "name": "CAUCA - ALCALD\u00cdA MUNICIPIO DE MERCADERES",
                    "roles": [
                        "procuringEntity",
                        "buyer"
                    ],
                    "address": {
                        "countryName": "COLOMBIA",
                        "region": "Cauca",
                        "locality": "Mercaderes"
                    },
                    "contactPoint": {
                        "email": "derazo@example.com",
                        "telephone": "152 2158746",
                        "name": "DIEGO EDUARDO ERAZO GUERRERO"
                    },
                    "identifier": {
                        "scheme": "CO-RUE",
                        "id": "890701933",
                        "legalName": "CAUCA - ALCALD\u00cdA MUNICIPIO DE MERCADERES"
                    },
                    "id": "890701933"
                }
            ],
            "buyer": {
                "id": "890701933",
                "name": "CAUCA - ALCALD\u00cdA MUNICIPIO DE MERCADERES"
            },
            "tender": {
                "id": "11-13-651832",
                "status": "active",
                "description": "CONSTRUCCI\u00d3N DE OBRAS DE REHABILITACI\u00d3N Y MANTENIMIENTO DE LA V\u00cdA CARRETEABLE: VEREDA CURACAS-VEREDA LA MONJITA, EN UNA EXTENSI\u00d3N DE SEIS (06) KIL\u00d3METROS EN MUNICIPIO DE MERCADERES CAUCA.",
                "procurementMethod": "open",
                "submissionMethodDetails": "Municipio obtenci\u00f3n: Mercaderes, Municipio entrega: Mercaderes, Municipio ejecuci\u00f3n: No definido, Lugar aclaraciones: No definido",
                "procurementMethodDetails": "Contrataci\u00f3n M\u00ednima Cuant\u00eda",
                "value": {
                    "amount": 5000000
                },
                "submissionMethod": [
                    "inPerson"
                ],
                "procuringEntity": {
                    "id": "890701933",
                    "name": "CAUCA - ALCALD\u00cdA MUNICIPIO DE MERCADERES"
                },
                "procurementMethodRationale": "Ninguna",
                "tenderPeriod": {
                    "startDate": "2011-10-14T16:22:00.000Z",
                    "endDate": "2011-10-26T00:00:00.000Z"
                },
                "contractPeriod": {
                    "startDate": null,
                    "endDate": null
                },
                "hasEnquiries": true,
                "amendments": [
                    {
                        "id": "01",
                        "date": "2011-10-18T08:54:21.000Z",
                        "amendsReleaseId": "11-13-651832-tender",
                        "description": "Se ha removido el periodo estimado de contrato y se ha extendido el periodo de presentaci\u00f3n de ofertas.",
                        "rationale": "Luego de recibir consultas de potenciales proveedores, se ha decidido omitir el periodo estimado de contrato y dejarlo abierto a negociaciones con el proveedor adjudicado."
                    }
                ]
            }
        }
    ]
}
{
    "uri": "",
    "publisher": {
        "name": "Colombia Compra Eficiente"
    },
    "publishedDate": "",
    "version": "1.1",
    "packages": [
        "https://standard.open-contracting.org/examples/releases/ocds-k50g02-11-13-651832-tenderUpdate.json",
        "https://standard.open-contracting.org/examples/releases/ocds-k50g02-11-13-651832-tender.json"
    ],
    "records": [
        {
            "ocid": "ocds-k50g02-11-13-651832",
            "releases": [
                {
                    "date": "2011-10-18T08:54:21.000Z",
                    "language": "es",
                    "ocid": "ocds-k50g02-11-13-651832",
                    "id": "11-13-651832-tenderUpdate",
                    "tag": [
                        "tenderAmendment"
                    ],
                    "initiationType": "tender",
                    "parties": [
                        {
                            "name": "CAUCA - ALCALD\u00cdA MUNICIPIO DE MERCADERES",
                            "roles": [
                                "procuringEntity",
                                "buyer"
                            ],
                            "address": {
                                "countryName": "COLOMBIA",
                                "region": "Cauca",
                                "locality": "Mercaderes"
                            },
                            "contactPoint": {
                                "email": "derazo@example.com",
                                "telephone": "152 2158746",
                                "name": "DIEGO EDUARDO ERAZO GUERRERO"
                            },
                            "identifier": {
                                "scheme": "CO-RUE",
                                "id": "890701933",
                                "legalName": "CAUCA - ALCALD\u00cdA MUNICIPIO DE MERCADERES"
                            },
                            "id": "890701933"
                        }
                    ],
                    "buyer": {
                        "id": "890701933",
                        "name": "CAUCA - ALCALD\u00cdA MUNICIPIO DE MERCADERES"
                    },
                    "tender": {
                        "id": "11-13-651832",
                        "status": "active",
                        "description": "CONSTRUCCI\u00d3N DE OBRAS DE REHABILITACI\u00d3N Y MANTENIMIENTO DE LA V\u00cdA CARRETEABLE: VEREDA CURACAS-VEREDA LA MONJITA, EN UNA EXTENSI\u00d3N DE SEIS (06) KIL\u00d3METROS EN MUNICIPIO DE MERCADERES CAUCA.",
                        "procurementMethod": "open",
                        "submissionMethodDetails": "Municipio obtenci\u00f3n: Mercaderes, Municipio entrega: Mercaderes, Municipio ejecuci\u00f3n: No definido, Lugar aclaraciones: No definido",
                        "procurementMethodDetails": "Contrataci\u00f3n M\u00ednima Cuant\u00eda",
                        "value": {
                            "amount": 5000000
                        },
                        "submissionMethod": [
                            "inPerson"
                        ],
                        "procuringEntity": {
                            "id": "890701933",
                            "name": "CAUCA - ALCALD\u00cdA MUNICIPIO DE MERCADERES"
                        },
                        "procurementMethodRationale": "Ninguna",
                        "tenderPeriod": {
                            "startDate": "2011-10-14T16:22:00.000Z",
                            "endDate": "2011-10-26T00:00:00.000Z"
                        },
                        "contractPeriod": {
                            "startDate": null,
                            "endDate": null
                        },
                        "hasEnquiries": true,
                        "amendments": [
                            {
                                "id": "01",
                                "date": "2011-10-18T08:54:21.000Z",
                                "amendsReleaseId": "11-13-651832-tender",
                                "description": "Se ha removido el periodo estimado de contrato y se ha extendido el periodo de presentaci\u00f3n de ofertas.",
                                "rationale": "Luego de recibir consultas de potenciales proveedores, se ha decidido omitir el periodo estimado de contrato y dejarlo abierto a negociaciones con el proveedor adjudicado."
                            }
                        ]
                    }
                },
                {
                    "date": "2011-10-14T16:26:49.000Z",
                    "language": "es",
                    "ocid": "ocds-k50g02-11-13-651832",
                    "id": "11-13-651832-tender",
                    "tag": [
                        "tender"
                    ],
                    "initiationType": "tender",
                    "parties": [
                        {
                            "name": "CAUCA - ALCALD\u00cdA MUNICIPIO DE MERCADERES",
                            "roles": [
                                "procuringEntity",
                                "buyer"
                            ],
                            "address": {
                                "countryName": "COLOMBIA",
                                "region": "Cauca",
                                "locality": "Mercaderes"
                            },
                            "contactPoint": {
                                "email": "derazo@example.com",
                                "telephone": "152 2158746",
                                "name": "DIEGO EDUARDO ERAZO GUERRERO"
                            },
                            "identifier": {
                                "scheme": "CO-RUE",
                                "id": "890701933",
                                "legalName": "CAUCA - ALCALD\u00cdA MUNICIPIO DE MERCADERES"
                            },
                            "id": "890701933"
                        }
                    ],
                    "buyer": {
                        "id": "890701933",
                        "name": "CAUCA - ALCALD\u00cdA MUNICIPIO DE MERCADERES"
                    },
                    "tender": {
                        "id": "11-13-651832",
                        "status": "active",
                        "description": "CONSTRUCCI\u00d3N DE OBRAS DE REHABILITACI\u00d3N Y MANTENIMIENTO DE LA V\u00cdA CARRETEABLE: VEREDA CURACAS-VEREDA LA MONJITA, EN UNA EXTENSI\u00d3N DE SEIS (06) KIL\u00d3METROS EN MUNICIPIO DE MERCADERES CAUCA.",
                        "procurementMethod": "open",
                        "submissionMethodDetails": "Municipio obtenci\u00f3n: Mercaderes, Municipio entrega: Mercaderes, Municipio ejecuci\u00f3n: No definido, Lugar aclaraciones: No definido",
                        "procurementMethodDetails": "Contrataci\u00f3n M\u00ednima Cuant\u00eda",
                        "value": {
                            "amount": 5000000
                        },
                        "submissionMethod": [
                            "inPerson"
                        ],
                        "procuringEntity": {
                            "id": "890701933",
                            "name": "CAUCA - ALCALD\u00cdA MUNICIPIO DE MERCADERES"
                        },
                        "procurementMethodRationale": "Ninguna",
                        "tenderPeriod": {
                            "startDate": "2011-10-14T16:22:00.000Z",
                            "endDate": "2011-10-20T00:00:00.000Z"
                        },
                        "contractPeriod": {
                            "startDate": "2011-11-20T09:00:00.000Z",
                            "endDate": "2012-01-31T17:00:00.000Z"
                        }
                    }
                }
            ],
            "compiledRelease": {
                "tag": [
                    "compiled"
                ],
                "id": "ocds-k50g02-11-13-651832-2011-10-18T08:54:21.000Z",
                "date": "2011-10-18T08:54:21.000Z",
                "ocid": "ocds-k50g02-11-13-651832",
                "language": "es",
                "initiationType": "tender",
                "parties": [
                    {
                        "id": "890701933",
                        "name": "CAUCA - ALCALD\u00cdA MUNICIPIO DE MERCADERES",
                        "roles": [
                            "procuringEntity",
                            "buyer"
                        ],
                        "address": {
                            "countryName": "COLOMBIA",
                            "region": "Cauca",
                            "locality": "Mercaderes"
                        },
                        "contactPoint": {
                            "email": "derazo@example.com",
                            "telephone": "152 2158746",
                            "name": "DIEGO EDUARDO ERAZO GUERRERO"
                        },
                        "identifier": {
                            "scheme": "CO-RUE",
                            "id": "890701933",
                            "legalName": "CAUCA - ALCALD\u00cdA MUNICIPIO DE MERCADERES"
                        }
                    }
                ],
                "buyer": {
                    "id": "890701933",
                    "name": "CAUCA - ALCALD\u00cdA MUNICIPIO DE MERCADERES"
                },
                "tender": {
                    "id": "11-13-651832",
                    "status": "active",
                    "description": "CONSTRUCCI\u00d3N DE OBRAS DE REHABILITACI\u00d3N Y MANTENIMIENTO DE LA V\u00cdA CARRETEABLE: VEREDA CURACAS-VEREDA LA MONJITA, EN UNA EXTENSI\u00d3N DE SEIS (06) KIL\u00d3METROS EN MUNICIPIO DE MERCADERES CAUCA.",
                    "procurementMethod": "open",
                    "submissionMethodDetails": "Municipio obtenci\u00f3n: Mercaderes, Municipio entrega: Mercaderes, Municipio ejecuci\u00f3n: No definido, Lugar aclaraciones: No definido",
                    "procurementMethodDetails": "Contrataci\u00f3n M\u00ednima Cuant\u00eda",
                    "value": {
                        "amount": 5000000
                    },
                    "submissionMethod": [
                        "inPerson"
                    ],
                    "procuringEntity": {
                        "id": "890701933",
                        "name": "CAUCA - ALCALD\u00cdA MUNICIPIO DE MERCADERES"
                    },
                    "procurementMethodRationale": "Ninguna",
                    "tenderPeriod": {
                        "startDate": "2011-10-14T16:22:00.000Z",
                        "endDate": "2011-10-26T00:00:00.000Z"
                    },
                    "contractPeriod": {},
                    "hasEnquiries": true,
                    "amendments": [
                        {
                            "id": "01",
                            "date": "2011-10-18T08:54:21.000Z",
                            "amendsReleaseId": "11-13-651832-tender",
                            "description": "Se ha removido el periodo estimado de contrato y se ha extendido el periodo de presentaci\u00f3n de ofertas.",
                            "rationale": "Luego de recibir consultas de potenciales proveedores, se ha decidido omitir el periodo estimado de contrato y dejarlo abierto a negociaciones con el proveedor adjudicado."
                        }
                    ]
                }
            },
            "versionedRelease": {
                "ocid": "ocds-k50g02-11-13-651832",
                "language": [
                    {
                        "releaseID": "11-13-651832-tender",
                        "releaseDate": "2011-10-14T16:26:49.000Z",
                        "releaseTag": [
                            "tender"
                        ],
                        "value": "es"
                    }
                ],
                "initiationType": [
                    {
                        "releaseID": "11-13-651832-tender",
                        "releaseDate": "2011-10-14T16:26:49.000Z",
                        "releaseTag": [
                            "tender"
                        ],
                        "value": "tender"
                    }
                ],
                "parties": [
                    {
                        "id": "890701933",
                        "name": [
                            {
                                "releaseID": "11-13-651832-tender",
                                "releaseDate": "2011-10-14T16:26:49.000Z",
                                "releaseTag": [
                                    "tender"
                                ],
                                "value": "CAUCA - ALCALD\u00cdA MUNICIPIO DE MERCADERES"
                            }
                        ],
                        "roles": [
                            {
                                "releaseID": "11-13-651832-tender",
                                "releaseDate": "2011-10-14T16:26:49.000Z",
                                "releaseTag": [
                                    "tender"
                                ],
                                "value": [
                                    "procuringEntity",
                                    "buyer"
                                ]
                            }
                        ],
                        "address": {
                            "countryName": [
                                {
                                    "releaseID": "11-13-651832-tender",
                                    "releaseDate": "2011-10-14T16:26:49.000Z",
                                    "releaseTag": [
                                        "tender"
                                    ],
                                    "value": "COLOMBIA"
                                }
                            ],
                            "region": [
                                {
                                    "releaseID": "11-13-651832-tender",
                                    "releaseDate": "2011-10-14T16:26:49.000Z",
                                    "releaseTag": [
                                        "tender"
                                    ],
                                    "value": "Cauca"
                                }
                            ],
                            "locality": [
                                {
                                    "releaseID": "11-13-651832-tender",
                                    "releaseDate": "2011-10-14T16:26:49.000Z",
                                    "releaseTag": [
                                        "tender"
                                    ],
                                    "value": "Mercaderes"
                                }
                            ]
                        },
                        "contactPoint": {
                            "email": [
                                {
                                    "releaseID": "11-13-651832-tender",
                                    "releaseDate": "2011-10-14T16:26:49.000Z",
                                    "releaseTag": [
                                        "tender"
                                    ],
                                    "value": "derazo@example.com"
                                }
                            ],
                            "telephone": [
                                {
                                    "releaseID": "11-13-651832-tender",
                                    "releaseDate": "2011-10-14T16:26:49.000Z",
                                    "releaseTag": [
                                        "tender"
                                    ],
                                    "value": "152 2158746"
                                }
                            ],
                            "name": [
                                {
                                    "releaseID": "11-13-651832-tender",
                                    "releaseDate": "2011-10-14T16:26:49.000Z",
                                    "releaseTag": [
                                        "tender"
                                    ],
                                    "value": "DIEGO EDUARDO ERAZO GUERRERO"
                                }
                            ]
                        },
                        "identifier": {
                            "scheme": [
                                {
                                    "releaseID": "11-13-651832-tender",
                                    "releaseDate": "2011-10-14T16:26:49.000Z",
                                    "releaseTag": [
                                        "tender"
                                    ],
                                    "value": "CO-RUE"
                                }
                            ],
                            "id": [
                                {
                                    "releaseID": "11-13-651832-tender",
                                    "releaseDate": "2011-10-14T16:26:49.000Z",
                                    "releaseTag": [
                                        "tender"
                                    ],
                                    "value": "890701933"
                                }
                            ],
                            "legalName": [
                                {
                                    "releaseID": "11-13-651832-tender",
                                    "releaseDate": "2011-10-14T16:26:49.000Z",
                                    "releaseTag": [
                                        "tender"
                                    ],
                                    "value": "CAUCA - ALCALD\u00cdA MUNICIPIO DE MERCADERES"
                                }
                            ]
                        }
                    }
                ],
                "buyer": {
                    "id": [
                        {
                            "releaseID": "11-13-651832-tender",
                            "releaseDate": "2011-10-14T16:26:49.000Z",
                            "releaseTag": [
                                "tender"
                            ],
                            "value": "890701933"
                        }
                    ],
                    "name": [
                        {
                            "releaseID": "11-13-651832-tender",
                            "releaseDate": "2011-10-14T16:26:49.000Z",
                            "releaseTag": [
                                "tender"
                            ],
                            "value": "CAUCA - ALCALD\u00cdA MUNICIPIO DE MERCADERES"
                        }
                    ]
                },
                "tender": {
                    "id": [
                        {
                            "releaseID": "11-13-651832-tender",
                            "releaseDate": "2011-10-14T16:26:49.000Z",
                            "releaseTag": [
                                "tender"
                            ],
                            "value": "11-13-651832"
                        }
                    ],
                    "status": [
                        {
                            "releaseID": "11-13-651832-tender",
                            "releaseDate": "2011-10-14T16:26:49.000Z",
                            "releaseTag": [
                                "tender"
                            ],
                            "value": "active"
                        }
                    ],
                    "description": [
                        {
                            "releaseID": "11-13-651832-tender",
                            "releaseDate": "2011-10-14T16:26:49.000Z",
                            "releaseTag": [
                                "tender"
                            ],
                            "value": "CONSTRUCCI\u00d3N DE OBRAS DE REHABILITACI\u00d3N Y MANTENIMIENTO DE LA V\u00cdA CARRETEABLE: VEREDA CURACAS-VEREDA LA MONJITA, EN UNA EXTENSI\u00d3N DE SEIS (06) KIL\u00d3METROS EN MUNICIPIO DE MERCADERES CAUCA."
                        }
                    ],
                    "procurementMethod": [
                        {
                            "releaseID": "11-13-651832-tender",
                            "releaseDate": "2011-10-14T16:26:49.000Z",
                            "releaseTag": [
                                "tender"
                            ],
                            "value": "open"
                        }
                    ],
                    "submissionMethodDetails": [
                        {
                            "releaseID": "11-13-651832-tender",
                            "releaseDate": "2011-10-14T16:26:49.000Z",
                            "releaseTag": [
                                "tender"
                            ],
                            "value": "Municipio obtenci\u00f3n: Mercaderes, Municipio entrega: Mercaderes, Municipio ejecuci\u00f3n: No definido, Lugar aclaraciones: No definido"
                        }
                    ],
                    "procurementMethodDetails": [
                        {
                            "releaseID": "11-13-651832-tender",
                            "releaseDate": "2011-10-14T16:26:49.000Z",
                            "releaseTag": [
                                "tender"
                            ],
                            "value": "Contrataci\u00f3n M\u00ednima Cuant\u00eda"
                        }
                    ],
                    "value": {
                        "amount": [
                            {
                                "releaseID": "11-13-651832-tender",
                                "releaseDate": "2011-10-14T16:26:49.000Z",
                                "releaseTag": [
                                    "tender"
                                ],
                                "value": 5000000
                            }
                        ]
                    },
                    "submissionMethod": [
                        {
                            "releaseID": "11-13-651832-tender",
                            "releaseDate": "2011-10-14T16:26:49.000Z",
                            "releaseTag": [
                                "tender"
                            ],
                            "value": [
                                "inPerson"
                            ]
                        }
                    ],
                    "procuringEntity": {
                        "id": [
                            {
                                "releaseID": "11-13-651832-tender",
                                "releaseDate": "2011-10-14T16:26:49.000Z",
                                "releaseTag": [
                                    "tender"
                                ],
                                "value": "890701933"
                            }
                        ],
                        "name": [
                            {
                                "releaseID": "11-13-651832-tender",
                                "releaseDate": "2011-10-14T16:26:49.000Z",
                                "releaseTag": [
                                    "tender"
                                ],
                                "value": "CAUCA - ALCALD\u00cdA MUNICIPIO DE MERCADERES"
                            }
                        ]
                    },
                    "procurementMethodRationale": [
                        {
                            "releaseID": "11-13-651832-tender",
                            "releaseDate": "2011-10-14T16:26:49.000Z",
                            "releaseTag": [
                                "tender"
                            ],
                            "value": "Ninguna"
                        }
                    ],
                    "tenderPeriod": {
                        "startDate": [
                            {
                                "releaseID": "11-13-651832-tender",
                                "releaseDate": "2011-10-14T16:26:49.000Z",
                                "releaseTag": [
                                    "tender"
                                ],
                                "value": "2011-10-14T16:22:00.000Z"
                            }
                        ],
                        "endDate": [
                            {
                                "releaseID": "11-13-651832-tender",
                                "releaseDate": "2011-10-14T16:26:49.000Z",
                                "releaseTag": [
                                    "tender"
                                ],
                                "value": "2011-10-20T00:00:00.000Z"
                            },
                            {
                                "releaseID": "11-13-651832-tenderUpdate",
                                "releaseDate": "2011-10-18T08:54:21.000Z",
                                "releaseTag": [
                                    "tenderAmendment"
                                ],
                                "value": "2011-10-26T00:00:00.000Z"
                            }
                        ]
                    },
                    "contractPeriod": {
                        "startDate": [
                            {
                                "releaseID": "11-13-651832-tender",
                                "releaseDate": "2011-10-14T16:26:49.000Z",
                                "releaseTag": [
                                    "tender"
                                ],
                                "value": "2011-11-20T09:00:00.000Z"
                            },
                            {
                                "releaseID": "11-13-651832-tenderUpdate",
                                "releaseDate": "2011-10-18T08:54:21.000Z",
                                "releaseTag": [
                                    "tenderAmendment"
                                ],
                                "value": null
                            }
                        ],
                        "endDate": [
                            {
                                "releaseID": "11-13-651832-tender",
                                "releaseDate": "2011-10-14T16:26:49.000Z",
                                "releaseTag": [
                                    "tender"
                                ],
                                "value": "2012-01-31T17:00:00.000Z"
                            },
                            {
                                "releaseID": "11-13-651832-tenderUpdate",
                                "releaseDate": "2011-10-18T08:54:21.000Z",
                                "releaseTag": [
                                    "tenderAmendment"
                                ],
                                "value": null
                            }
                        ]
                    },
                    "hasEnquiries": [
                        {
                            "releaseID": "11-13-651832-tenderUpdate",
                            "releaseDate": "2011-10-18T08:54:21.000Z",
                            "releaseTag": [
                                "tenderAmendment"
                            ],
                            "value": true
                        }
                    ],
                    "amendments": [
                        {
                            "id": "01",
                            "date": [
                                {
                                    "releaseID": "11-13-651832-tenderUpdate",
                                    "releaseDate": "2011-10-18T08:54:21.000Z",
                                    "releaseTag": [
                                        "tenderAmendment"
                                    ],
                                    "value": "2011-10-18T08:54:21.000Z"
                                }
                            ],
                            "amendsReleaseId": [
                                {
                                    "releaseID": "11-13-651832-tenderUpdate",
                                    "releaseDate": "2011-10-18T08:54:21.000Z",
                                    "releaseTag": [
                                        "tenderAmendment"
                                    ],
                                    "value": "11-13-651832-tender"
                                }
                            ],
                            "description": [
                                {
                                    "releaseID": "11-13-651832-tenderUpdate",
                                    "releaseDate": "2011-10-18T08:54:21.000Z",
                                    "releaseTag": [
                                        "tenderAmendment"
                                    ],
                                    "value": "Se ha removido el periodo estimado de contrato y se ha extendido el periodo de presentaci\u00f3n de ofertas."
                                }
                            ],
                            "rationale": [
                                {
                                    "releaseID": "11-13-651832-tenderUpdate",
                                    "releaseDate": "2011-10-18T08:54:21.000Z",
                                    "releaseTag": [
                                        "tenderAmendment"
                                    ],
                                    "value": "Luego de recibir consultas de potenciales proveedores, se ha decidido omitir el periodo estimado de contrato y dejarlo abierto a negociaciones con el proveedor adjudicado."
                                }
                            ]
                        }
                    ]
                }
            }
        }
    ]
}

Example 3: Deletion of array items

The public procurement authority in Zambia publishes an award notice, as well as an OCDS release with an 'award' tag. A NGO collects the individual releases published by the procurement authority on a weekly basis to merge into their own records, which they use to display information on their website.

Two weeks later, the authority publishes a new release. Due to negotiations with the awarded supplier, one of the items in the award is being deleted and two new ones have been added to replace it, as show below. The two new items have been added at the end of the items array, and the item to remove has all its fields set to null.

The NGO generates a record. In the record, all the fields of the removed item have disappeared, and only its id is left.

{
    "uri": "https://standard.open-contracting.org/examples/releases/ocds-23g63a01-200502-award.json",
    "publisher": {
        "name": "Zambia Public Procurement Authority"
    },
    "publishedDate": "2018-12-31T23:00:00Z",
    "version": "1.1",
    "releases": [
        {
            "language": "en",
            "ocid": "ocds-23g63a01-200502",
            "id": "ocds-23g63a01-200502-award",
            "tag": [
                "award"
            ],
            "initiationType": "tender",
            "date": "2018-12-31T23:00:00Z",
            "parties": [
                {
                    "id": "ZM-PCR-001",
                    "contactPoint": {
                        "url": "http://www.Zamtel.zm",
                        "faxNumber": "+260211256622",
                        "telephone": "+260211333152",
                        "email": "Customerservice@Zamtel.co.zm"
                    },
                    "identifier": {
                        "id": "001",
                        "scheme": "ZM-PCR",
                        "legalName": "Zambia Telecommunications Company Limited"
                    },
                    "name": "Zambia Telecommunications Company Limited",
                    "address": {
                        "postalCode": "37000",
                        "countryName": "Zambia",
                        "region": "ZM",
                        "streetAddress": "Zamtel House, Corner Church and Chilubi Roads",
                        "locality": "Lusaka"
                    },
                    "roles": [
                        "buyer"
                    ]
                },
                {
                    "id": "ZM-PCR-104500",
                    "name": "Joziel General Dealers Ltd",
                    "contactPoint": {
                        "telephone": "+260978552867"
                    },
                    "identifier": {
                        "scheme": "ZM-PCR",
                        "id": "104500",
                        "uri": "https://www.pacra.org.zm/#/p/pacrasearch/",
                        "legalName": "Joziel General Dealers Ltd"
                    },
                    "address": {
                        "postalCode": "",
                        "countryName": "Zambia",
                        "region": "ZM",
                        "streetAddress": "Plot 17 Chaholi Road Rhodes Park",
                        "locality": "Lusaka"
                    },
                    "roles": [
                        "supplier"
                    ]
                }
            ],
            "buyer": {
                "id": "ZM-PCR-001",
                "name": "Zambia Telecommunications Company Limited"
            },
            "awards": [
                {
                    "status": "active",
                    "description": "SUPPLY AND DELIVERY OF VARIOUS STATIONERY",
                    "title": "SUPPLY AND DELIVERY OF VARIOUS STATIONERY",
                    "items": [
                        {
                            "unit": {
                                "name": "each"
                            },
                            "quantity": 30,
                            "description": "Notebooks",
                            "classification": {
                                "scheme": "UNSPSC",
                                "description": "Paper pads and notebooks",
                                "id": "14111514"
                            },
                            "id": "14111514"
                        },
                        {
                            "unit": {
                                "name": "Ream"
                            },
                            "quantity": 130,
                            "description": "Printing and writing paper",
                            "classification": {
                                "scheme": "UNSPSC",
                                "description": "Printing and writing paper",
                                "id": "14111500"
                            },
                            "id": "14111500"
                        },
                        {
                            "unit": {
                                "name": "packet"
                            },
                            "quantity": 100,
                            "description": "Self adhesive note paper",
                            "classification": {
                                "scheme": "UNSPSC",
                                "description": "Self adhesive note paper",
                                "id": "14111530"
                            },
                            "id": "14111530"
                        },
                        {
                            "unit": {
                                "name": "each"
                            },
                            "quantity": 200,
                            "description": "Folders",
                            "classification": {
                                "scheme": "UNSPSC",
                                "description": "Folders",
                                "id": "44122011"
                            },
                            "id": "44122011"
                        }
                    ],
                    "suppliers": [
                        {
                            "id": "ZM-PCR-104500",
                            "name": "Joziel General Dealers Ltd"
                        }
                    ],
                    "value": {
                        "currency": "ZMW",
                        "amount": 13363.23
                    },
                    "date": "2018-12-31T06:40:57Z",
                    "id": "1201"
                }
            ]
        }
    ]
}
{
    "uri": "https://standard.open-contracting.org/examples/releases/ocds-23g63a01-200502-awardAmendment.json",
    "publisher": {
        "name": "Zambia Public Procurement Authority"
    },
    "publishedDate": "2019-01-21T09:00:00Z",
    "version": "1.1",
    "releases": [
        {
            "language": "en",
            "ocid": "ocds-23g63a01-200502",
            "id": "ocds-23g63a01-200502-awardAmendment",
            "tag": [
                "awardAmendment"
            ],
            "initiationType": "tender",
            "date": "2019-01-21T09:00:00Z",
            "parties": [
                {
                    "id": "ZM-PCR-001",
                    "contactPoint": {
                        "url": "http://www.Zamtel.zm",
                        "faxNumber": "+260211256622",
                        "telephone": "+260211333152",
                        "email": "Customerservice@Zamtel.co.zm"
                    },
                    "identifier": {
                        "id": "001",
                        "scheme": "ZM-PCR",
                        "legalName": "Zambia Telecommunications Company Limited"
                    },
                    "name": "Zambia Telecommunications Company Limited",
                    "address": {
                        "postalCode": "37000",
                        "countryName": "Zambia",
                        "region": "ZM",
                        "streetAddress": "Zamtel House, Corner Church and Chilubi Roads",
                        "locality": "Lusaka"
                    },
                    "roles": [
                        "buyer"
                    ]
                },
                {
                    "id": "ZM-PCR-104500",
                    "name": "Joziel General Dealers Ltd",
                    "contactPoint": {
                        "telephone": "+260978552867"
                    },
                    "identifier": {
                        "scheme": "ZM-PCR",
                        "id": "104500",
                        "uri": "https://www.pacra.org.zm/#/p/pacrasearch/",
                        "legalName": "Joziel General Dealers Ltd"
                    },
                    "address": {
                        "postalCode": "",
                        "countryName": "Zambia",
                        "region": "ZM",
                        "streetAddress": "Plot 17 Chaholi Road Rhodes Park",
                        "locality": "Lusaka"
                    },
                    "roles": [
                        "supplier"
                    ]
                }
            ],
            "buyer": {
                "id": "ZM-PCR-001",
                "name": "Zambia Telecommunications Company Limited"
            },
            "awards": [
                {
                    "status": "active",
                    "description": "SUPPLY AND DELIVERY OF VARIOUS STATIONERY",
                    "title": "SUPPLY AND DELIVERY OF VARIOUS STATIONERY",
                    "items": [
                        {
                            "unit": {
                                "name": "each"
                            },
                            "quantity": 30,
                            "description": "Notebooks",
                            "classification": {
                                "scheme": "UNSPSC",
                                "description": "Paper pads and notebooks",
                                "id": "14111514"
                            },
                            "id": "14111514"
                        },
                        {
                            "unit": {
                                "name": null
                            },
                            "quantity": null,
                            "description": null,
                            "classification": {
                                "scheme": null,
                                "description": null,
                                "id": null
                            },
                            "id": "14111500"
                        },
                        {
                            "unit": {
                                "name": "packet"
                            },
                            "quantity": 100,
                            "description": "Self adhesive note paper",
                            "classification": {
                                "scheme": "UNSPSC",
                                "description": "Self adhesive note paper",
                                "id": "14111530"
                            },
                            "id": "14111530"
                        },
                        {
                            "unit": {
                                "name": "each"
                            },
                            "quantity": 200,
                            "description": "Folders",
                            "classification": {
                                "scheme": "UNSPSC",
                                "description": "Folders",
                                "id": "44122011"
                            },
                            "id": "44122011"
                        },
                        {
                            "unit": {
                                "name": "Ream"
                            },
                            "quantity": 150,
                            "description": "Computer printout paper",
                            "classification": {
                                "scheme": "UNSPSC",
                                "description": "Computer printout paper",
                                "id": "14111506"
                            },
                            "id": "14111506"
                        },
                        {
                            "unit": {
                                "name": "Ream"
                            },
                            "quantity": 20,
                            "description": "Writing paper",
                            "classification": {
                                "scheme": "UNSPSC",
                                "description": "Writing paper",
                                "id": "14111511"
                            },
                            "id": "14111511"
                        }
                    ],
                    "suppliers": [
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                                "releaseDate": "2018-12-31T23:00:00Z",
                                "releaseTag": [
                                    "award"
                                ],
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                        ]
                    }
                ],
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                        {
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                            "releaseDate": "2018-12-31T23:00:00Z",
                            "releaseTag": [
                                "award"
                            ],
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                    ],
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                            "releaseTag": [
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                                ],
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                            }
                        ],
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                                        ],
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                                    {
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                                        {
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                                        },
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                                            "releaseTag": [
                                                "award"
                                            ],
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                                        }
                                    ]
                                },
                                "quantity": [
                                    {
                                        "releaseID": "ocds-23g63a01-200502-award",
                                        "releaseDate": "2018-12-31T23:00:00Z",
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                                        ],
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                                    }
                                ],
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                                        "releaseID": "ocds-23g63a01-200502-award",
                                        "releaseDate": "2018-12-31T23:00:00Z",
                                        "releaseTag": [
                                            "award"
                                        ],
                                        "value": "Self adhesive note paper"
                                    }
                                ],
                                "classification": {
                                    "scheme": [
                                        {
                                            "releaseID": "ocds-23g63a01-200502-award",
                                            "releaseDate": "2018-12-31T23:00:00Z",
                                            "releaseTag": [
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                                            ],
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                                        }
                                    ],
                                    "description": [
                                        {
                                            "releaseID": "ocds-23g63a01-200502-award",
                                            "releaseDate": "2018-12-31T23:00:00Z",
                                            "releaseTag": [
                                                "award"
                                            ],
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                                        }
                                    ],
                                    "id": [
                                        {
                                            "releaseID": "ocds-23g63a01-200502-award",
                                            "releaseDate": "2018-12-31T23:00:00Z",
                                            "releaseTag": [
                                                "award"
                                            ],
                                            "value": "14111530"
                                        }
                                    ]
                                }
                            },
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                                "unit": {
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                                        {
                                            "releaseID": "ocds-23g63a01-200502-award",
                                            "releaseDate": "2018-12-31T23:00:00Z",
                                            "releaseTag": [
                                                "award"
                                            ],
                                            "value": "each"
                                        }
                                    ]
                                },
                                "quantity": [
                                    {
                                        "releaseID": "ocds-23g63a01-200502-award",
                                        "releaseDate": "2018-12-31T23:00:00Z",
                                        "releaseTag": [
                                            "award"
                                        ],
                                        "value": 200
                                    }
                                ],
                                "description": [
                                    {
                                        "releaseID": "ocds-23g63a01-200502-award",
                                        "releaseDate": "2018-12-31T23:00:00Z",
                                        "releaseTag": [
                                            "award"
                                        ],
                                        "value": "Folders"
                                    }
                                ],
                                "classification": {
                                    "scheme": [
                                        {
                                            "releaseID": "ocds-23g63a01-200502-award",
                                            "releaseDate": "2018-12-31T23:00:00Z",
                                            "releaseTag": [
                                                "award"
                                            ],
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                                        }
                                    ],
                                    "description": [
                                        {
                                            "releaseID": "ocds-23g63a01-200502-award",
                                            "releaseDate": "2018-12-31T23:00:00Z",
                                            "releaseTag": [
                                                "award"
                                            ],
                                            "value": "Folders"
                                        }
                                    ],
                                    "id": [
                                        {
                                            "releaseID": "ocds-23g63a01-200502-award",
                                            "releaseDate": "2018-12-31T23:00:00Z",
                                            "releaseTag": [
                                                "award"
                                            ],
                                            "value": "44122011"
                                        }
                                    ]
                                }
                            },
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                                    "name": [
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                                            "releaseTag": [
                                                "awardAmendment"
                                            ],
                                            "value": "Ream"
                                        }
                                    ]
                                },
                                "quantity": [
                                    {
                                        "releaseID": "ocds-23g63a01-200502-awardAmendment",
                                        "releaseDate": "2019-01-21T09:00:00Z",
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                                        ],
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                                    }
                                ],
                                "description": [
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                                        "releaseDate": "2019-01-21T09:00:00Z",
                                        "releaseTag": [
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                                        ],
                                        "value": "Computer printout paper"
                                    }
                                ],
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                                            "releaseDate": "2019-01-21T09:00:00Z",
                                            "releaseTag": [
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                                            ],
                                            "value": "UNSPSC"
                                        }
                                    ],
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                                        {
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                                            "releaseDate": "2019-01-21T09:00:00Z",
                                            "releaseTag": [
                                                "awardAmendment"
                                            ],
                                            "value": "Computer printout paper"
                                        }
                                    ],
                                    "id": [
                                        {
                                            "releaseID": "ocds-23g63a01-200502-awardAmendment",
                                            "releaseDate": "2019-01-21T09:00:00Z",
                                            "releaseTag": [
                                                "awardAmendment"
                                            ],
                                            "value": "14111506"
                                        }
                                    ]
                                }
                            },
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                                "id": "14111511",
                                "unit": {
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                                            "releaseID": "ocds-23g63a01-200502-awardAmendment",
                                            "releaseDate": "2019-01-21T09:00:00Z",
                                            "releaseTag": [
                                                "awardAmendment"
                                            ],
                                            "value": "Ream"
                                        }
                                    ]
                                },
                                "quantity": [
                                    {
                                        "releaseID": "ocds-23g63a01-200502-awardAmendment",
                                        "releaseDate": "2019-01-21T09:00:00Z",
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                                ],
                                "description": [
                                    {
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                                            "awardAmendment"
                                        ],
                                        "value": "Writing paper"
                                    }
                                ],
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                                            "releaseDate": "2019-01-21T09:00:00Z",
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                                            ],
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                                    ],
                                    "description": [
                                        {
                                            "releaseID": "ocds-23g63a01-200502-awardAmendment",
                                            "releaseDate": "2019-01-21T09:00:00Z",
                                            "releaseTag": [
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                                            ],
                                            "value": "Writing paper"
                                        }
                                    ],
                                    "id": [
                                        {
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                                            "releaseDate": "2019-01-21T09:00:00Z",
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                                            ],
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                                        }
                                    ]
                                }
                            }
                        ],
                        "suppliers": [
                            {
                                "id": "ZM-PCR-104500",
                                "name": [
                                    {
                                        "releaseID": "ocds-23g63a01-200502-award",
                                        "releaseDate": "2018-12-31T23:00:00Z",
                                        "releaseTag": [
                                            "award"
                                        ],
                                        "value": "Joziel General Dealers Ltd"
                                    }
                                ]
                            }
                        ],
                        "value": {
                            "currency": [
                                {
                                    "releaseID": "ocds-23g63a01-200502-award",
                                    "releaseDate": "2018-12-31T23:00:00Z",
                                    "releaseTag": [
                                        "award"
                                    ],
                                    "value": "ZMW"
                                }
                            ],
                            "amount": [
                                {
                                    "releaseID": "ocds-23g63a01-200502-award",
                                    "releaseDate": "2018-12-31T23:00:00Z",
                                    "releaseTag": [
                                        "award"
                                    ],
                                    "value": 13363.23
                                },
                                {
                                    "releaseID": "ocds-23g63a01-200502-awardAmendment",
                                    "releaseDate": "2019-01-21T09:00:00Z",
                                    "releaseTag": [
                                        "awardAmendment"
                                    ],
                                    "value": 13452.0
                                }
                            ]
                        },
                        "date": [
                            {
                                "releaseID": "ocds-23g63a01-200502-award",
                                "releaseDate": "2018-12-31T23:00:00Z",
                                "releaseTag": [
                                    "award"
                                ],
                                "value": "2018-12-31T06:40:57Z"
                            }
                        ],
                        "amendments": [
                            {
                                "id": "001",
                                "description": [
                                    {
                                        "releaseID": "ocds-23g63a01-200502-awardAmendment",
                                        "releaseDate": "2019-01-21T09:00:00Z",
                                        "releaseTag": [
                                            "awardAmendment"
                                        ],
                                        "value": "One awarded item has been removed in favor of other two ones."
                                    }
                                ],
                                "rationale": [
                                    {
                                        "releaseID": "ocds-23g63a01-200502-awardAmendment",
                                        "releaseDate": "2019-01-21T09:00:00Z",
                                        "releaseTag": [
                                            "awardAmendment"
                                        ],
                                        "value": "Items have been changed after negociations with the awarded supplier."
                                    }
                                ],
                                "amendsReleaseID": [
                                    {
                                        "releaseID": "ocds-23g63a01-200502-awardAmendment",
                                        "releaseDate": "2019-01-21T09:00:00Z",
                                        "releaseTag": [
                                            "awardAmendment"
                                        ],
                                        "value": "ocds-23g63a01-200502-award"
                                    }
                                ]
                            }
                        ]
                    }
                ]
            }
        }
    ]
}

Note

The current merge routine does not include a strategy to completely remove an entry from an array. We invite discussion on how to remove objects from arrays in issue #232.