Glossary
The vocabulary of verifiable credentials.
Every concept behind LearnCoin, one URL each. Self-contained definitions with external spec links and cross-references to related terms. Written to be usable by humans, crawlers, and AI agents without any other page loaded.
100 terms · Updated continuously
Standards
The open specifications LearnCoin implements — W3C VCs, DIDs, Open Badges, Blockcerts, JSON-LD.
Blockcerts v3
Also: Blockcerts
An open standard for blockchain-anchored verifiable credentials, originally created at MIT Media Lab and now stewarded by Hyland.
Read definitionCTDL
Also: Credential Transparency Description Language
The US credential-transparency data model from Credential Engine — the parallel to ESCO for US labor-market credentials.
Read definitionEBSI
Also: European Blockchain Services Infrastructure
The European Blockchain Services Infrastructure — the EU's shared public infrastructure for cross-border trust services including verifiable credentials.
Read definitioneIDAS 2.0
Also: eIDAS 2, eIDAS Regulation
The EU regulation mandating European Digital Identity Wallets for every Member State, with verifiable-credential support baked in.
Read definitionESCO
Also: CEDEFOP ESCO, European Skills/Competences
The EU's multilingual taxonomy of skills, competences, and occupations — the standard alignment target for European credentials.
Read definitionEUDI Wallet
Also: European Digital Identity Wallet, EUDI
The European Digital Identity Wallet — the EU's wallet specification for holding and presenting verifiable credentials, backed by the EUDI ARF.
Read definitionISO/IEC 18013-5 (mDL)
Also: mDL, ISO mDL, mobile driving licence
The ISO standard for mobile driver's licenses — the mDL format EUDI Wallet and most government digital-ID programs support.
Read definitionJSON-LD
Also: JSON for Linking Data
A W3C-standardized JSON serialization for Linked Data. Every W3C Verifiable Credential is a JSON-LD document.
Read definitionLearnCoin JSON-LD context
Also: schema.learncoin.me/v1/context.json
The LearnCoin-hosted JSON-LD context carrying LearnCoin extension fields (awardingBody, result, evidence, difficulty, actualDuration) — publication pending.
Read definitionOpen Badges 3.0
Also: OB 3.0, Open Badge 3.0
The 1EdTech specification for digital badges and micro-credentials, aligned with W3C Verifiable Credentials as of version 3.
Read definitionOpenID Connect
Also: OIDC
The identity layer built on OAuth 2.0 — the protocol that powers 'Sign in with Google' and most modern federated authentication.
Read definitionOpenID4VCI
Also: OpenID for Verifiable Credential Issuance
An OpenID Foundation spec that standardizes how a wallet holder pulls a verifiable credential from an issuer via OAuth-style flows.
Read definitionOpenID4VP
Also: OpenID for Verifiable Presentations
The sibling of OpenID4VCI — a spec for how a wallet presents a verifiable credential to a verifier using OAuth-style flows.
Read definitionSD-JWT
Also: Selective Disclosure JWT
The IETF draft for selective-disclosure JWTs — the likely EU-mandated format for EUDI Wallet selective-disclosure presentations.
Read definitionVC-JWT
Also: Verifiable Credential JWT, JWT-VC
An alternative serialization of W3C Verifiable Credentials using signed JWTs instead of JSON-LD with Linked Data Proofs.
Read definition
Missing a term?
Email us and we'll add it. The glossary is versioned in public on GitHub — additions land with every release.
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