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XML namespace

   Also found in: Wikipedia 0.04 sec.

XML namespace

A method for identifying XML elements and attributes that have the same name, but different meanings. For example, ADDRESS is a tag that can be used to identify totally different data elements such as "street address" and "IP address."

An XML Namespace is a Prefix
An XML namespace uses a URL as a prefix in front of the "local name." The combination of URL and local name makes the element or attribute name unique. The URL is used only as a way to create a unique prefix and does not have to resolve to a real page on the Internet. However, a document may be stored where the URL points that provides information about the namespace (see RDDL).



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An additional major metadata development has been the employment of W3C's XML Schemas and XML Namespaces to combine metadata elements from different domains/namespaces into "application profiles" or metadata schemas that have been optimized for a particular application.
XML namespaces leverage tags created from other developers even if they have the same name.
A NIST scientist provided MPEG-7 schema and sub-schema validation for the ISO/IEC multimedia description scheme; MPEG-7 sub-schemas included description definition language, visual, audio, and W3C 1998 XML Namespace.
 
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