|xapi:closelyRelatedNaturalLanguageTerm||A property used to connect the xAPI term to a specific sense, or meaning, in natural language that is very closely related. The sense will be identified with Wordnet, a carefully constructed ontology that aids in word sense disambiguation, which has been used with many different languages.||owl:ObjectProperty||skos:relatedMatch||skos:Concept||wordnet:Synset|
|skos:definition||A property borrowed from SKOS that is used to provide a plain text definition or description for a resource.||owl:AnnotationProperty||skos:note|
|skos:inScheme||A property borrowed from SKOS that relates a concept (for example a verb) to a concept scheme in which it is included. Verbs and Activity Types should be in a concept scheme (vocabulary) and are connected using this property.||owl:ObjectProperty||skos:ConceptScheme|
|skos:prefLabel||A property borrowed from SKOS that is used to provide the preferred lexical label for a resource, in a given language.||owl:AnnotationProperty||rdfs:label|
|xapi:referencedBy||A property used to connects an xapi:Verb not directly maintained by the controlled vocabulary author to a vocabulary that is reusing and referencing the term.||owl:ObjectProperty||skos:inScheme||skos:ConceptScheme|
|skos:scopeNote||A note that helps to clarify the meaning and/or the use of a concept.||owl:AnnotationProperty||skos:note|
|xapi:thirdPartyLabel||A property used by people who did not create the original verb, but would like to offer an alternative label for it.||owl:AnnotationProperty||skos:altLabel||Inherited from skos:altLabel|
Figure 7. Table of recommended properties for xAPI Vocabulary datasets.