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5. Important Concepts from the W3C RDF V... > 5.1. RDF Vocabulary: Describing the ...

RDF Vocabulary: Describing the Data

The last few chapters have emphasized that the RDF specification is about metadata—data about data. This is a key RDF concept; by creating a domain-neutral specification to describe resources, the same specification can then be used with many different domains but still be processed by the same RDF agents or parsed by the same RDF parsers.

Because of the importance of understanding metadata’s role within RDF, we’ll start by taking a closer look at the concept of metadata, particularly as it’s used in applications today.

Metadata’s Role in Existing Applications

If you’ve worked with any kind of relational database such as Oracle, Sybase, MySQL, or Microsoft’s SQL Server, you’ve used metadata. The way that these database management systems can be used for many different applications, and to store many different types of data, is by using metadata structures.


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