The Dublin Core metadata standard is a simple yet effective element set for describing a wide range of networked resources. The Dublin Core standard includes two levels: Simple and Qualified. Simple Dublin Core comprises fifteen elements; Qualified Dublin Core includes an additional element, Audience, as well as a group of element refinements (also called qualifiers) that refine the semantics of the elements in ways that may be useful in resource discovery. The semantics of Dublin Core have been established by an international, cross-disciplinary group of professionals from librarianship, computer science, text encoding, the museum community, and other related fields of scholarship and practice. Source: Understanding Metadata: Using Dublin Core, By Dianne Hillman, Dublin Core Metadata Initiative.
Another way to look at Dublin Core is as a "small language for making a particular class of statements about resources". Source: Understanding Metadata: Using Dublin Core, By Dianne Hillman, Dublin Core Metadata Initiative.
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