OWL Ontologies and SKOS Vocabularies for Linked Models of Industry and Government Standards

What is "Linked Models"

Linked Models will be a site for publishing RDF/OWL models of commonly used industry and government standards. The work is motivated by the desire to use Semantic Web Technologies for interoperability, information aggregation and validation of specifciations that have been created using UML tools and/or XML Schema tools.

Why OWL Models

Models expressed in UML are limited in their interoperability because of the ineffectiveness of XMI as an exchange mechanism between UML tools, which often implement proprietary formats that extend current XMI standards. On the other hand, OWL models are designed precisely for data exchange and model integration. Through a formalism that is founded on interoperability principles of uniform identifiers and canonical representations of modeling facts, they have intrinsic properties for linking data and models.

Why SKOS Vocabularies

SKOS, the Simple Knowledge Organization System, provides an extensible language for describing structured terminology systems like taxonomies and thesauri. Based on RDF, it inherits the power of flexibility and distribution. SKOS extends RDF with specific notions of linkage between structured vocabularies, making it particularly useful for enterprise vocabulary management.

Published Models and Vocabularies

The following links will take you to some examples of the content that is accessible from this site:


  1. VAEM 1.2 - Vocabulary for Attaching Essential Metadata Version 1.2
  2. VAEM 2.0 - Vocabulary for Attaching Essential Metadata Version 2.0


  1. VOAG 1.0 - Vocabulary of Attribution and Governance Version 1.0
  2. VOAG SCHEMA 2.0 - Schema for Vocabulary of Attribution and Governance Version 2.0
  3. Software Licenses in VOAG - Software Licenses specified using VOAG, Version 2.0


  1. DTYPE 1.0 - Datatype Ontology Version 1.0
  2. DTYPE 1.2 - Datatype Ontology Version 1.2


  1. QUDT version 1.1 - Quantities, Units, Dimensions and Types Ontologies and Vocabularies [Catalog Example]
  2. QUDT Schema v2.0
  3. QUDT SCHEMA Dimension v2.0
  4. QUDT SCHEMA Science v2.0
  5. QUDT SCHEMA Quantity v2.0
  6. QUDT Unit Vocabularies v2.0 (multiple domains)
  7. QUDT Quantity Vocabularies v2.0 (multiple domains)


  1. oeGOV - Ontologies and Vocabularies of democracy and the US Government
  2. U.S. Constitution Ontology [Turtle File]
  3. FEA Ontologies
  4. NIEM Ontologies and Vocabularies
  5. DoDAF Ontologies

Industry Classification Codes

  1. NAICS 2007 Industry Classification Vocabulary (NAICS) [Turtle File]
  2. SIC Standard Industrial Classificaton [Turtle File]
  3. GICS(R) Industry Codes
  4. TRBC Classification Codes

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