The Vocabulary Hub for Sovereign Dataspaces
Publish and maintain domain ontologies, dereference semantic terms in real-time for dataspace connectors, and run automated remote conformance tests with verifiable trust.
Core Semantic & Architectural Pillars
Enabling frictionless semantic interoperability and verified compliance across heterogeneous dataspace connectors.
Single Source of Semantic Truth
Author, version, document, and publish domain ontologies, RDF vocabularies, and dataset profiles to unify meaning across dataspace participants.
Dynamic Term Dereferencing
Connectors resolve unknown attribute IRIs in Self-Descriptions on the fly, dereferencing machine-readable RDF schemas, property classes, and multilingual labels.
Remote Conformance Tests
Automated semantic verification using SHACL constraint shapes. Validates that connector payloads, catalogs, and dataset offerings strictly conform to dataspace rules.
Unified Wallet Port
Cryptographic keys and signing material never reside in the node. Pluggable adapters decouple domain logic from Fafnir and Eclipse EDC IdentityHub.
Node-Terminated OIDC IAM
Authentication terminates at the node with encrypted HttpOnly session cookies and PKCE via Zitadel. Protects vocabulary authoring and remote testing endpoints.
In-Process Seams & Full TLS
Engineered as an in-process modular monolith with strict Go package seams, full TLS reverse proxy parity via Caddy, and one-command startup.
Powering Semantic Interoperability in Sovereign Dataspaces
Learn how Alexandria manages vocabulary lifecycles, dereferences term IRIs in real time, and executes remote SHACL conformance tests to certify dataspace data models.