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6. Creating an RDF Vocabulary > 6.4. Formalizing the Vocabulary with RDFS

Formalizing the Vocabulary with RDFS

Formally defined RDFS schemas aren’t required for all RDF documents, but the schema approach guarantees that a particular RDF document is semantically and syntactically consistent across implementations.

RDFS defines which vocabulary elements are classes and which are properties. In addition, RDFS also matches a property with a specific element, as well as defining the range for each property. This is particularly helpful when defining properties that contain a range of elements, such as the pstcn:movementType property in the last section. RDFS also documents the type of literal that each property can reference—whether the property value is a string or a number, such as an integer.


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