DOIAbstract
Metadata is structured information that describes, explains, locates, or otherwise makes it easier to retrieve, use, or manage an information resource (NISO, 2004). The commonly seen definition in the literature of metadata, however, is "data about data". Purists disagree with this generic definition, and argue that the definition varies depending upon the type of metadata we are talking about. They offer the definition "data about the containers of data" for Structural metadata and "data about data content" or "content about content" for Descriptive metadata
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