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Also known as: SKOS
A W3C model for representing concept schemes like taxonomies and thesauri using RDF.
DESCRIPTION
SKOS provides a lightweight, standardized way to represent controlled vocabularies. It models concepts, labels, notes, and relationships like broader, narrower, and related. Based on RDF, SKOS integrates with Linked Data and SPARQL. It supports multilingual labels and semantic interoperability across systems. Organizations publish subject headings and taxonomies using SKOS for reuse. SKOS complements OWL by focusing on knowledge organization rather than complex logical constraints. Tools like PoolParty and Protégé help author SKOS concept schemes.
ALTERNATIVE DEFINITIONS
W3C
SKOS provides a model for expressing the basic structure and content of concept schemes such as thesauri, classification schemes, taxonomies, subject heading systems, and other types of controlled vocabulary.
Stresses coverage of various controlled vocabulary types.
Wikipedia
The Simple Knowledge Organization System (SKOS) is a W3C standard that provides a model for expressing knowledge organization systems via the Resource Description Framework.
Highlights W3C standard status and RDF basis.
RELATED TERMS
RDF Class Hierarchy Value Set Thesaurus Concept Scheme Linked Data SPARQL Knowledge Graph Subject Headings
COMPETING TERMS
RELATIONS
- Broader: Knowledge Organization System
KNOWLEDGE AREAS
Semantic & Knowledge Modeling Data Management
TARGET AUDIENCE
Information Analyst Data Modeler Data Architect Data Steward
EXTERNAL SOURCES
- Wikipedia - Simple Knowledge Organization System
- W3C - SKOS primer and examples
- PoolParty - Vendor overview of SKOS
- W3C - Authoritative SKOS reference
TOP QUESTIONS
What is SKOS used for?
SKOS models controlled vocabularies like taxonomies and thesauri, enabling consistent labeling and relationships between concepts.
Category: Overview
How does SKOS relate to RDF and OWL?
SKOS uses RDF for representation and complements OWL by focusing on concept schemes rather than logical constraints.
Category: Comparison
What are core SKOS properties?
skos:prefLabel, skos:altLabel, skos:broader, skos:narrower, and skos:related are central to concept modeling.
Category: Components
What are common SKOS modeling mistakes?
Misusing broader/narrower vs. related, omitting preferred labels, and neglecting language tags reduce clarity and interoperability.
Category: Mistakes
Why is SKOS relevant for data governance?
It standardizes terminology and relationships, improving metadata consistency and findability across systems.
Category: Relevancy
How does SKOS support multilingual vocabularies?
Labels include language tags, allowing multiple preferred and alternate labels per concept in different languages.
Category: Mechanics
What tools support SKOS authoring?
PoolParty, Protégé, and RDF stores provide SKOS modeling, validation, and publishing capabilities.
Category: Tools
What is a hot topic around SKOS?
Linking SKOS concept schemes to knowledge graphs and schema.org improves discoverability and interoperability.
Category: Topic
How do I start learning SKOS?
Read the W3C SKOS Primer and practice with small concept schemes using an RDF store or Protégé.
Category: Learning