Glossary

Glossary

Short definitions of the terms and acronyms used across SIGNET and this wiki.

A2A

Agent-to-Agent / Agent Card. A model for advertising an agent's capabilities at a well-known location (/.well-known/agent.json) so they are discoverable across organisational boundaries. SIGNET's AgentCapability and SyntheticAgent.agentCard align to it.

CDM

Canonical Data Model. SIGNET's central normative artifact — the shared four-layer vocabulary (Foundation, Process, Agent, Trust). See Architecture Overview.

CC0 1.0

A public-domain dedication. The SIGNET artifacts are released under CC0 1.0; it covers copyright in the artifacts only, not the marks.

CLA

Contributor Licence Agreement. The Concert CLA under which contributions are accepted — see Contributing.

CPV

Common Procurement Vocabulary. An EU classification scheme for procurement subject matter, used in Classification (scheme: cpv).

DID

Decentralised Identifier (W3C DID 1.0). A stable, resolvable identifier that needs no central registry (e.g. did:web:supplier.example.com). RECOMMENDED for parties and agents — see Identifier.

EN 16931

The European standard for the semantic model of an electronic invoice. SIGNET's Invoice is mapped to its Business Terms (BT) and Business Groups (BG). Basis of the EU ViDA alignment — see EN 16931 & ViDA E-Invoicing.

ePO

EU eProcurement Ontology. An OWL/RDF ontology of procurement semantics. SIGNET's JSON-LD context aligns terms to ePO (e.g. procuringParty → ePO:hasBuyer).

Factur-X

A hybrid PDF/XML invoice format (EN 16931 compliant). A SIGNET invoice is convertible to it.

GLEIF / LEI

Global Legal Entity Identifier Foundation / Legal Entity Identifier (ISO 17442). A global organisation identifier scheme (scheme: gleif:lei).

GLN

Global Location Number (GS1). A location/party identifier (scheme: gs1:gln).

JSON-LD

JSON for Linked Data. SIGNET's canonical serialisation; it gives every object and property a global URI while remaining ordinary JSON to consumers that ignore the semantics. See Serialisation.

Mandate

The bounded authority granted to an agent — the structural guarantee it cannot exceed its remit. See Mandate.

MAT

Most Advantageous Tender. A common evaluation model (e.g. price/quality/social-value weighting), expressed as a Policy. See the worked policy example.

OCDS

Open Contracting Data Standard. The lifecycle vocabulary SIGNET's process layer aligns to (planning → tender → award → contract → implementation).

Peppol BIS

Peppol Business Interoperability Specifications. Profiles of UBL for cross-border ordering, cataloguing, and billing. SIGNET projects to Peppol BIS Billing 3.0.

PROV / PROV-O

W3C Provenance Ontology. SIGNET's Provenance aligns to it (wasGeneratedBy, wasDerivedFrom, wasAttributedTo).

Selective disclosure

A cryptographic technique (e.g. BBS proofs) letting a party prove a claim from a credential without revealing the whole credential. See Credential.

SIGNET

Secure Intelligent Governed Network for Exchange and Trade — the standard this repository defines.

Solid

A data-sovereignty pattern (decoupling data from applications, with consent-based access). Inspires SIGNET's Consent model.

Synthetic agent

An AI agent operating as a first-class Party. See SyntheticAgent.

UBL

Universal Business Language. An XML document syntax for business documents (Order, Catalogue, Invoice). SIGNET projects its Invoice to UBL 2.1.

Verifiable Credential (VC)

A W3C standard for tamper-evident, cryptographically verifiable claims about a subject. SIGNET's Credential is a VC reference.

ViDA

VAT in the Digital Age. An EU package mandating EN 16931-based cross-border e-invoicing (from July 2030). See EN 16931 & ViDA E-Invoicing.