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The Resource Description Framework (RDF) is a methodology for the description of information, originally developed for describing metadata of IT resources. Today it is used much more generally, often in connection with the sematic web, but also in other applications.
The RDF model represents information as triples in the form of subject-predicate-object.
Database management systems, which are able to store and process such triples, are called RDF stores or triple stores.
RDF stores can be seen as a subclass of graph DBMS, by interpreting the predicate as a connection between subject and object in the above notation. However, RDF stores offer specific methods that go beyond those of the general graph DBMS. For example, SPARQL, an SQL-like query language for RDF data, is supported by most RDF stores.
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