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Metadata (Greek meta "over" and Latin data "information", literally "data about data") are data that describe other data. Generally, a set of metadata describe a single set of data, called a resource.

Metadata are of special interest in various fields of computer science, e. g. information retrieval and the semantic web. Although many consider them a powerful tool to bridge the semantic gap, they are criticized severely by others.

Definitions


The term was introduced intuitively, i.e. without exact definition. Because of that today there is a whole variety of definitions. The most common one is the literal translation:
  • Metadata are data on data.

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500 Metadata Developer Central - Netscape

A Web Hub for Developing Administrative Metadata for Electronic Resource Management - News, links to documents and projects, and a mailing list.

Advanced Meta Data Architecture - David Marco. Architectural challenges that arise with implementing a meta data repository that requires more advanced functionality.

Agricultural Metadata Element Set Project - The AgMES project promotes the use of metadata in description of all document-like information objects in the domain of agriculture. It is an extension of the Dublin Core element set.

CanCore - Official home for documents, presentations and other resources related to the Canadian Core Learning Object Metadata Application Profile. The CanCore Profile is intended to facilitate the interchange of records describing educational resources and the discovery of these resources both in Canada and beyond its borders.

Digital Libraries: Metadata Resources - IFLA collection of Internet metadata resources.
Meta Description: [ IFLA collection of Internet metadata resources. ]

500 EServer TC Library: Metadata - A collection of more than 65 rated, reviewed online resources in metadata cataloguing.

EuroCRIS CERIF Task Group - Task Group maintaining and developing Common European Research Information Format Metadata and database format. First published and supported by European Commission for research and scientific data sharing and exchange.

FASTER - Describes a metadata project focused on creating an easy-to-use and flexible tool for access to official and other statistical data.
Meta Description: [ Simon Musgrave introduces two social science data archives, NESSTAR and FASTER ]

Index Data - Specializes in the design and development of advanced software for information management and retrieval applications. Uses Z39.50, Dublin Core and XML.

404 IWBase - This is an interconnected network of distributed repositories of proof and explanation meta information.

Metacrap - Cory Doctorow's seven arguments against metadata.

Metadata : Why should we care? - By Kathleen Forsythe and Diana Brooking. University of Washington.
Meta Description: [ Page redirect ]

Metadata Architecture and Application Team (MAAT) - Includes MAAT news, introduction, activities, and metadata resources.

Metadata at W3C - Metadata research at the World Wide Web Consortium.

Metadata projects, resources, workshops - European Commission: Telematics for Libraries.

Metadata Research Center (MRC) - The University of North Carolina School of Information and Library (SILS) Metadata Research Center has been established to advance research in the area of metadata, semantics and ontologies.

Metadata Standards and Information Analysis - Surveys several metadata standards with the assumption that surveying the models that can serve as a basis for the metadata standards.

Metadata.Net Home Page - Resources from the Distributed Systems Technology Center (DSTC).

MetaMap - An annotated Scalable Vector Graphic showing metadata standards, sets, and initiatives.

National Curriculum Metadata Standard - Description and documentation of the metadata standard for the National Curriculum for England.

Public Broadcasting Metadata Dictionary (PBCore) - Designed to provide for television, radio and Web activities a standard way of describing and using data. This allows content to be more easily retrieved and shared.
Meta Description: [ PBCore is a Metadata & Cataloging Resource for Public Broadcasters & Associated Communities ]

Recordkeeping Metadata Standard for Commonwealth Agencies - This standard describes the metadata that the National Archives of Australia recommends should be captured in the recordkeeping systems used by Commonwealth government agencies. The text of the standard is available in html, pdf, and downloadable as a zip file.

Resource Guide to Metadata - Reference to metadata standards for scientific, research, and education information. Site describes ontologies for science.

500 SMBmeta - Designed to help small- and medium-sized businesses provide information to search engines and directories in an open and distributed way. Includes documentation and source code.

SSD (Simple Storefront Distribution) - A web content distribution method used by E-Commerce websites to share catalog data in a format easily interpreted by computer software. SSD is an XML 1.0 based markup language modeled after the RSS 2.0 specification.
Meta Description: [ SSD (Simple Storefront Distribution) is a web content distribution method used by E-Commerce websites to share catalog data in a format easily interpreted by computer software. ]

Technical standards for electronic bibliographic data/metadata - Subset of the Cataloguer's Toolbox. URNs, SICI, DOI, Z39.50, TEI, RDF, and Dublin Core.

500 The MetaWeb Project - The aim of the Metadata Tools and Services project - known as MetaWeb - is to develop indexing services, user tools, and metadata element sets in order to promote the use of, and exploitation of metadata on the Internet.

The Publishing Requirements for Industry Standard Metadata (PRISM) Specification - Defines an XML metadata vocabulary for managing, aggregating, post-processing, multi-purposing and aggregating magazine and mainstream journal content. PRISM is defined by a working group of IDEAlliance, a publishing industry association.

UKOLN Metadata - Resources from the UK Office for Library and Information Networking

University of Queensland: An Introduction to Metadata - Detailed explanation of metadata, schema and elements, in a FAQ format. Includes related links.

404 WebMonkey: Metadata, Mark II - Jason Cook's article about some independent technologies such as GeoURL, SMBmeta, Dublin Core, RDF, and FOAF.

What is Metadata? - Alexandria Digital Library

XML: Metadata For the Rest of Us. - By Jeffery Veen. Wired Magazine. Includes an interview with Tim Bray.

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