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Dublin Core is an information classification method commonly used in libraries. The Dublin Core standard has an XML Schema that defines how to describe this type of information using XML. Dublin Core effectively catalogues information and makes it easy to modify, query, and use. Dublin Core's current use in information description and definition makes the Semantic Web a reality. pass

Dublin Core is an information classification method commonly used in libraries. The Dublin Core standard has an XML Schema that defines how to describe this type of information using XML. Dublin Core effectively catalogues information and makes it easy to modify, query, and use.

Dublin Core's current use in information description and definition makes the Semantic Web a reality. By using a uniform standard to describe data and, more importantly, a well-designed and proven solution to describe data in other XML documents in detail, information can be exchanged and compared efficiently between different sources.

The Dublin Core specification has its own schema, but its purpose is to embed larger XML documents, using XML namespaces to define DC elements needed to describe other data in the document. As an example, read Listing 10 to see how the DC taxonomy can be used in an RDF XML schema to describe the content of an RDF entity, such as a website. To do this, you can extend the structure in the previous RDF schema example.

listing 10. DC taxonomy is used in RDF XML schema to describe the content of RDF entities

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Listing 10 uses DC elements to add description, subject, publisher, copyright, and identifier information to categorize RSS feeds.

The complete Dublin Core Metadata Elements Set consists of 15 metadata elements.

Title Creator Subject Description Publisher Contributor Date Type Format Identifier Source Language Relation Coverage Rights

This provides a wide range of descriptive information.

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