Portable Document A1 (PDA1) - credential schema

When to use

Use this skill when you issue or verify a Portable Document A1 (PDA1) credential. PDA1 is the EU social security document. It states which member state social security legislation applies to a worker who works in more than one member state, or who is posted to another member state.

The registry gives the credential type PortableDocumentA1 and the namespace org.iso.18013.5.1.pda1. The schema supports three formats: SD-JWT VC (dc+sd-jwt), W3C JWT VC (jwt_vc_json) and mdoc (mso_mdoc).

The registry keeps this schema under credentialSchemas/claimPathPointer/pda1. Version 2025.7.1 is the latest version directory, and this skill uses it. The registry publishes the schema in three formats: dc+sd-jwt, jwt_vc_json and mso_mdoc.