Open Contracting Data Standard

Governments around the world spend an estimated US$13 trillion through contracts every year. Yet, contracting information is often unavailable for public scrutiny.

Le Standard de Données sur la Commande Publique Ouverte (OCDS) permet la divulgation de données et de documents à toutes les étapes d'un processus de commande publique en définissant un modèle commun de données. Il a été créé pour accompagner les organisations dans l'amélioration de la transparence de la commande publique et pour permettre une analyse plus profonde des données sur la commande publique par un éventail plus large d'usagers.

The OCDS documentation is made up of several parts, designed to help you use the OCDS effectively.

  • Primer: Introducing the key concepts and features of the OCDS

  • Guidance: Step-by-step instructions on how to design and implement an OCDS publication, including practical examples

  • Reference: The OCDS data model (schemas, codelists and validation rules) as well as specific rules that need to be followed to publish OCDS data

  • Getting help: How you can get Helpdesk support, tools that can help you use the OCDS, and how you can participate in the OCDS community

  • History: Information about the changes in each version of the OCDS

  • Data Review Tool: A tool to help check whether your data is following the OCDS correctly

The Open Contracting Data Standard is a core product of the Open Contracting Partnership (OCP). If you are interested to learn more about Open Contracting advocacy and how it can be used to support wider reform and measurable improvements in public contracting, please visit


This is the English (and canonical) version of the OCDS documentation. You can switch to the Spanish and French translations using the language switcher.