A2A Procurement Profile

Draft v0.1 (in flight). Expect breaking changes until v1.0.

A draft agent-to-agent procurement interoperability profile layered on existing UBL 2.3, Peppol BIS Pre-Award, OCDS 1.1.5 and EU eForms semantics. The canonical types align field by field with those vocabularies wherever a mapping exists, and add new terms only where the agent-to-agent workflow has no existing fit.

This site serves the machine-readable artifacts. The prose (ADRs, crosswalks, governance) is published in the source repository.

Machine-readable artifacts

• Vocabulary namespace v0.1 (https://spec.bidangelai.com/v0.1/)
• Requirement JSON-LD context (/contexts/v0.1/requirement.context.jsonld)

Contexts for the opportunity, buyer and evaluation criterion fragments, and JSON Schema files for each fragment, are forthcoming.

Crosswalks

• Requirement to UBL / Peppol
• Opportunity to UBL / Peppol
• Buyer to UBL / Peppol
• Evaluation criterion to UBL / Peppol
• Criterion type to EU-COM-GROW codelist
• Opportunity status lifecycle map
• Rejection clause vocabulary audit

Design records and governance

• Architecture Decision Records
• Governance
• Provenance
• Contributing
• Intent-to-author letter (2026-05-10)
• TSC discussion: a2aproject/A2A#1832

License

Code, schemas and JSON-LD contexts: Apache License 2.0. Prose: Creative Commons Attribution 4.0 International.