# Linked.Archi — Semantic Assets for Enterprise Architecture > Ontologies, metamodels, taxonomies, and SHACL shapes for building architectural knowledge graphs. This site publishes RDF vocabularies (OWL/SHACL/SKOS) with full HTTP content negotiation. All namespace URIs are dereferenceable — request `text/turtle`, `application/ld+json`, `application/rdf+xml`, or `application/n-triples` via the Accept header. ## Disclaimer Linked.Archi is an independent, unofficial project. It is NOT affiliated with, endorsed by, or produced by The Open Group, OMG, ISO, Spotify, SAP, or any other standards body or vendor. Trademarked names (ArchiMate, TOGAF, BPMN, UML, Backstage, LeanIX, etc.) are property of their respective owners. The ontologies here are interpretive formalizations of published specifications — they represent one possible OWL/SHACL encoding, not an authoritative normative definition. Always refer to the original specifications for definitive semantics. ## Key Entry Points - [Ontology Catalog](https://meta.linked.archi/): Interactive index of all semantic assets - [Documentation](https://meta.linked.archi/docs/): Guides, design decisions, and quick start - [Full LLM Map](https://meta.linked.archi/llms-full.txt): Complete resource listing with descriptions ## Canonical Namespaces and Current Versions | Prefix | Namespace | Version | Modified | |--------|-----------|---------|----------| | admit: | https://meta.linked.archi/admit/onto# | 0.1.0 | 2026-05-02 | | aigovrd: | https://meta.linked.archi/ai-governance/reference-data# | 0.1.0 | 2026-05-03 | | ### http://purl.org/vocab/vann/preferredNamespacePrefix: | ### http://purl.org/vocab/vann/preferredNamespaceUri | 0.0.5 | ### http://purl.org/dc/terms/modified | | am30: | https://meta.linked.archi/archimate3/onto/3.0# | 3.0 | — | | amate: | https://meta.linked.archi/archimate3/onto/3.1# | 3.1 | 2020-07-27 | | am: | https://meta.linked.archi/archimate3/onto# | 3.2 | 2025-12-01 | | am4: | https://meta.linked.archi/archimate4/onto# | 4.0 | 2026-04-29 | | ### http://purl.org/vocab/vann/preferredNamespacePrefix: | ### http://purl.org/vocab/vann/preferredNamespaceUri | 0.1.0 | ### http://purl.org/dc/terms/modified | | atam: | https://meta.linked.archi/atam/onto# | 0.1.0 | 2026-05-03 | | bs: | https://meta.linked.archi/backstage/onto# | 0.2.0 | 2026-04-12 | | bpmnl: | https://meta.linked.archi/bpmn-lite/onto# | 0.1.0 | 2026-05-06 | | c4: | https://meta.linked.archi/c4/onto# | 0.3.0 | 2026-04-20 | | structurizr: | https://meta.linked.archi/c4/structurizr# | 0.1.0 | 2026-04-20 | | cnc: | https://meta.linked.archi/CnC# | 0.0.1 | 2021-05-05 | | arch: | https://meta.linked.archi/core# | 0.3.2 | 2026-04-12 | | dodaf: | https://meta.linked.archi/dodaf/onto# | 2.02 | 2026-05-03 | | eaop: | https://meta.linked.archi/eaonapage/onto# | 0.1.0 | 2026-05-03 | | easvcrd: | https://meta.linked.archi/ea-service/reference-data# | 0.1.0 | 2026-05-03 | | cp: | https://meta.linked.archi/examples/cloudplatform/onto# | 0.1.0 | 2026-05-03 | | finard: | https://meta.linked.archi/financial-architecture/reference-data# | 0.1.0 | 2026-05-03 | | acme: | https://model.example.com/acme-ea# | — | 2026-05-03 | | fraud: | https://model.example.com/fraud-detection# | — | 2026-05-03 | | iso12207: | https://meta.linked.archi/iso12207# | 0.1.0 | 2020-07-27 | | iso15288: | https://meta.linked.archi/iso15288# | 0.1.0 | 2020-07-27 | | iso25010: | https://meta.linked.archi/iso25010# | 0.2.0 | 2026-05-02 | | iso25011: | https://meta.linked.archi/iso25011# | 0.2.0 | 2026-05-02 | | iso25012: | https://meta.linked.archi/iso25012# | 0.2.0 | 2026-05-02 | | iso42010: | https://meta.linked.archi/iso42010# | 0.1.0 | 2019-03-17 | | iso42020: | https://meta.linked.archi/iso42020# | 0.1.0 | 2020-07-27 | | lmm: | https://meta.linked.archi/leanix/onto# | 4.0.0 | 2026-04-12 | | lmm3: | https://meta.linked.archi/leanix/v3-onto# | 3 | 2026-04-12 | | mlqa: | https://meta.linked.archi/ml-systems/quality-attributes# | 0.1.0 | 2026-05-03 | | ### http://purl.org/vocab/vann/preferredNamespacePrefix: | ### http://purl.org/vocab/vann/preferredNamespaceUri | 0.1.0 | ### http://purl.org/dc/terms/modified | | ### http://purl.org/vocab/vann/preferredNamespacePrefix: | ### http://purl.org/vocab/vann/preferredNamespaceUri | 0.0.5 | ### http://purl.org/dc/terms/modified | | ### http://purl.org/vocab/vann/preferredNamespacePrefix: | ### http://purl.org/vocab/vann/preferredNamespaceUri | 0.1.0 | ### http://purl.org/dc/terms/modified | | timefw: | https://meta.linked.archi/time-framework/onto# | 0.1.1 | 2026-05-02 | | togaf: | https://meta.linked.archi/togaf/onto# | 10.0 | 2026-04-29 | | uaf: | https://meta.linked.archi/uaf/onto# | 1.2 | 2026-02-01 | | uml: | https://meta.linked.archi/uml/onto# | 0.1.0 | 2026-02-01 | Turtle is the canonical serialization. All source files are authored in Turtle. ## Published Ontologies - [Linked.Archi ADMIT Design Forces Ontology](https://meta.linked.archi/admit/onto): - [Linked.Archi AI Governance Reference Data](https://meta.linked.archi/ai-governance/reference-data): - [### http://purl.org/dc/elements/1.1/title](https://meta.linked.archi/arch-decision): ### http://purl.org/dc/elements/1.1/description - [Linked.Archi ArchiMate 3.0 Ontology](https://meta.linked.archi/archimate3/onto/3.0): Linked.Archi ArchiMate 3.0 Ontology - [Linked.Archi ArchiMate 3.1 Ontology](https://meta.linked.archi/archimate3/onto/3.1): - [Linked.Archi ArchiMate 3.2 Ontology](https://meta.linked.archi/archimate3/onto): - [Linked.Archi ArchiMate Ontology](https://meta.linked.archi/archimate3-shapes): Linked.Archi ArchiMate 3.0 Ontology - [Linked.Archi ArchiMate 4.0 Ontology](https://meta.linked.archi/archimate4/onto): - [### http://purl.org/dc/elements/1.1/title](https://meta.linked.archi/arch-processes): ### http://purl.org/dc/elements/1.1/description - [Linked.Archi ATAM Ontology](https://meta.linked.archi/atam/onto): - [Linked.Archi Backstage Metamodel Ontology](https://meta.linked.archi/backstage/onto): - [Minimal Metamodel](https://meta.linked.archi/basic): Minimal Metamodel - [Linked.Archi BPMN Lite Ontology](https://meta.linked.archi/bpmn-lite/onto): - [Linked.Archi C4 Model Ontology](https://meta.linked.archi/c4/onto): - [Linked.Archi Structurizr Extension Ontology](https://meta.linked.archi/c4/structurizr): - [Component and Connector Example Ontology](https://meta.linked.archi/CnC): - [Core Linked.Archi Ontology](https://meta.linked.archi/core): - [Core Linked.Archi Ontology for Diagrams](https://meta.linked.archi/core-vis): Base Ontology EA modeling - [Linked.Archi DoDAF Ontology](https://meta.linked.archi/dodaf/onto): - [Linked.Archi EA on a Page Ontology](https://meta.linked.archi/eaonapage/onto): - [Linked.Archi EA-as-a-Service Reference Data](https://meta.linked.archi/ea-service/reference-data): - [Cloud Platform Architecture Ontology](https://meta.linked.archi/examples/cloudplatform/onto): - [Linked.Archi Financial Architecture Reference Data](https://meta.linked.archi/financial-architecture/reference-data): - [Acme Corp EA-as-a-Service — Worked Example](https://meta.linked.archi/https:/model.example.com/acme-ea): - [Fraud Detection ML-Enabled System — Example Model](https://meta.linked.archi/https:/model.example.com/fraud-detection): - [Linked.Archi ISO/IEC/IEEE 12207 Software Lifecycle Processes](https://meta.linked.archi/iso12207): - [Linked.Archi ISO/IEC/IEEE 15288 System Lifecycle Processes](https://meta.linked.archi/iso15288): - [Linked.Archi ISO/IEC 25010 Software Product Quality Model](https://meta.linked.archi/iso25010): - [Linked.Archi ISO/IEC 25011 IT Service Quality Model](https://meta.linked.archi/iso25011): - [Linked.Archi ISO/IEC 25012 Data Quality Model](https://meta.linked.archi/iso25012): - [Linked.Archi ISO/IEC/IEEE 42010 Architecture Description Concepts](https://meta.linked.archi/iso42010): - [Linked.Archi ISO/IEC/IEEE 42020 Architecture Governance Processes](https://meta.linked.archi/iso42020): - [Linked.Archi LeanIX Meta Model v4 Ontology](https://meta.linked.archi/leanix/onto): - [Linked.Archi LeanIX Meta Model v3 Ontology](https://meta.linked.archi/leanix-v3): - [Linked.Archi ML-Specific Quality Attributes](https://meta.linked.archi/ml-systems/quality-attributes): - [### http://purl.org/dc/elements/1.1/title](https://meta.linked.archi/quality-attributes): ### http://purl.org/dc/elements/1.1/description - [### http://purl.org/dc/elements/1.1/title](https://meta.linked.archi/ref-arch): ### http://purl.org/dc/elements/1.1/description - [Simple Example Ontology](https://meta.linked.archi/simple-example): Simplest possible Linked.Archi metamodel example - [### http://purl.org/dc/elements/1.1/title](https://meta.linked.archi/tactics): ### http://purl.org/dc/elements/1.1/description - [Linked.Archi TIME Framework Ontology](https://meta.linked.archi/time-framework/onto): - [Linked.Archi TOGAF Content Metamodel](https://meta.linked.archi/togaf/onto): - [Linked.Archi UAF Ontology](https://meta.linked.archi/uaf/onto): - [Linked.Archi UML 2.5.1 Ontology](https://meta.linked.archi/uml/onto): ## Namespace Convention All ontologies use `https://meta.linked.archi/` as the base namespace. Append `#` for hash-namespace ontologies (e.g., `https://meta.linked.archi/core#`). ## How to Use 1. Dereference any namespace URI with an RDF-aware client (e.g., `curl -H "Accept: text/turtle" https://meta.linked.archi/core`) 2. Browse the [Ontology Catalog](https://meta.linked.archi/) for interactive HTML documentation 3. Read the [Quick Start Guide](https://meta.linked.archi/docs/guide/quick-start/) for authoring models 4. Use SHACL shapes for validation (every metamodel ships with constraint shapes)