flowchart LR subgraph "(URL)" id1(("subject")) end subgraph "(URL or literal)" id2(("object")) end id1 --"predicate/has some property with (URL)"--> id2

In RDF, the use of URLs allows for disambiguation of the terms:

  • URLs provide global uniqueness.

  • URLs can be looked up which can provide additional context (such as descriptions and additional information) and thereby may help reduce ambiguity.

To model data in RDF, the appropriate URLs must exist:

  • You can use existing vocabularies.

  • You can create your own vocabulary.