Working with Sport Schema - SKOS Add-on

The IPTC Sports Schema utilizes a set of RDF, RDFS, and OWL constructs to create a extensible schema. SKOS (short for Simple Knowledge Organisation System) is a popular system for managing knowledge models that contain hierarchy and relationships.

Popular industry tools may utilise SKOS to create and visualise such models. The IPTC Sport Schema team has created an add-on that extends the core Schema so it can be used with such systems.

SKOS Concepts

With the add-on installed, IPTC Sport Schema classes that are either standalone or at the first-level of a class hierarchy will now be a subclasses of skos:Concept.

Concept Example

@prefix rdf:       <> .
@prefix rdfs:      <> .
@prefix skos:      <> .
@prefix sport:     <> .

sport:Agent rdfs:subClassOf skos:Concept .

SKOS Relationships

The IPTC Sport Schema also defines relationship types between classes. Three SKOS relationship types are leveraged here for hierarchy and relations. The IPTC defined relationships will now be a subclass of skso:broader, skos:narrower, or skos:related.

SKOS Relationship Example

@prefix rdf:       <> .
@prefix rdfs:      <> .
@prefix skos:      <> .
@prefix sport:     <> .

sport:eventInCompetition rdfs:subPropertyOf skos:broader .
sport:containsEvent rdfs:subPropertyOf skos:narrower .

Instance-level Data

When creating instance-level data you may want to create a skos:ConceptScheme to attach your concepts. For example, a Concept Scheme such as “Teams” will include teams for a particular competition. A skos:TopConcept pointing to each of your Team instance will allow you to start to build a hierarchical model.

Instance Example

    rdf:type skos:ConceptScheme ;
    rdfs:label "Teams"@en ;
    skos:hasTopConcept <> .


The IPTC Sport Schema utilises simple labelling using rdfs:label. You may want to consider extending functionality in your system to utilise skos:prefLabel or skosxl:prefLabel. The rdfs:label can be copied into one of the SKOS label conventions with a small SPARQL Query as follows:

PREFIX rdfs: <>
PREFIX rdf: <>
PREFIX skos: <>

  ?subject skos:prefLabel ?label .
  ?subject rdfs:label ?label .