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A metadata standard is a requirement which is intended to establish a common understanding of the meaning or semantics of the data, to ensure correct and proper use and interpretation of the data by its owners and users. To achieve this common understanding, a number of characteristics, or attributes of the data have to be defined, also known as metadata.〔International Organization for Standardization and the International Electromechanical Commission (ISO/IEC) (2003), Information Technology - Metadata Registries - Part 3: Registry metamodel and basic attributes, ISO/IEC 11179-3:2003(E), International Organization for Standardization, Geneva〕 == Metadata == Metadata is often defined as ''data about data''.〔Duval, E. (2001), Metadata Standards, What, Who & Why, Journal of Universal Computer Science, 7(7), 591-601, Springer〕〔Cabinet Office (2006), e-Government Metadata Standard Version 3.1, e-Government Unit, London〕 It is “structured information that describes, explains, locates, or otherwise makes it easier to retrieve, use or manage an information resource”, especially in a distributed network environment like for example the internet or an organization.〔De Carvalho Moura, A.M., Machado Campos, M.L., Barreto, C.M. (1998), A survey on metadata for describing and retrieving Internet resources, World Wide Web, 1, (4), 221-240, Kluwer Academic Publishers〕 A good example of metadata is the cataloging system found in libraries, which records for example the author, title, subject, and location on the shelf of a resource. Another is software system knowledge extraction of software objects such as data flows, control flows, call maps, architectures, business rules, business terms, and database schemas. Metadata is usually categorized in three types:〔Lambe, P. (2007), Organising Knowledge: Taxonomies, Knowledge and Organisational effectiveness, Chandos Publishing, Oxford〕〔 *Descriptive metadata describes an information resource for identification and retrieval through elements such as title, author, and abstract. *Structural metadata documents relationships within and among objects through elements such as links to other components (e.g., how pages are put together to form chapters). *Administrative metadata helps to manage information resources through elements such as version number, archiving date, and other technical information for purposes of file management, rights management and preservation. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Metadata standard」の詳細全文を読む スポンサード リンク
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