# Ontologies

Ontologies define the structure of the data that the triplestore can hold. It defines the possible resource classes, the properties these classes may have, and the relation between the different classes as expressed by these properties.

Tracker defines stock ontologies that are ready for use, but also allows developers to define ontologies that are tailored for their use.

Subpages:

Nepomuk – The Nepomuk ontology

Base ontology – Base for defining ontologies

Defining ontologies – Defining Ontologies

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