Semantically Based Clinical TCM Telemedicine Systems by Allan K. Y. Wong Jackei H. K. Wong Wilfred W. K. Lin Tharam S. Dillon & Elizabeth J. Chang

Author:Allan K. Y. Wong, Jackei H. K. Wong, Wilfred W. K. Lin, Tharam S. Dillon & Elizabeth J. Chang
Language: eng
Format: epub
Publisher: Springer Berlin Heidelberg, Berlin, Heidelberg

(reproduced from http://​www.​w3schools.​com/​rdf/​rdf_​dublin.​asp)

Conceptually the elements in Simple Dublin Core could be construed as predefined “data types”. In contrast, the XML has only one data type “string”. After the original 15 elements specification, refinement of the Dublin Core Metadata Element Set (DCMES) continued. Additional terms were identified by working groups in the Dublin Core Metadata Initiative (DCMI) and judged by the DCMI Usage Board to be in conformance with principles of good practice for the qualification of Dublin Core metadata elements.

RDF element refinements narrow its meaning, and a refined element shares the meaning of the unqualified element but with a more restricted scope. In addition to element refinements, Qualified Dublin Core includes a set of recommended encoding schemes, designed to aid the interpretation of an element value. The schemes include controlled terms and formal notations or parsing rules. A value expressed using an encoding scheme may thus be a token selected from a controlled vocabulary, or a string formatted in accordance with a formal notation. For example, “2008-03-10” can be used as the standard expression of a date. DCMI also maintains a small, general vocabulary recommended for use within the element Type. This vocabulary currently consists of 12 terms. In effect, the refinement is a standardization process. An example of RDF and XML namespace is shown below. An XML namespace is used to unambiguously identify the schema for the Dublin Core terms by pointing to the definitive Dublin Core resource that defines the corresponding semantics. In this example, RDF is nested inside XML—the two are interoperable.

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