Resource Description Framework


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Resource Description Framework

(World-Wide Web, specification, data)
(RDF) A specification being developed in 2000 by the W3C as a foundation for processing meta-data regarding resources on the Internet, including the World-Wide Web.

Resource Description Framework data consists of resources (nodes), and property/value pairs describing the resource. A node is any object which can be pointed to by a URI, properties are attributes of the node, and values can be either atomic values for the attribute, or other nodes. For example, information about a particular web page (a node), might include the property "Author". The value for the Author property could be either a string giving the name of the author, or a link to a resource describing the author.

Resource Description Framework only specifies a mechanism for encoding and transferring meta-data. It does not specify what that meta-data should, or can be. RDF does not, for example, define an "Author" attribute. Sets of properties are defined within RDF Vocabularies (or Schemas). Anynone can create an RDF schema, describing a specialized set of properties, by creating a resource, referenced by the Schema URI, which provides a human- and machine-understandable definition of the schema's properties. The description of a node may include properties defined in different schemas. The properties within a resource description are associated with a certain schema definition using the XML namespace mechanism. Schemas currently being developed include a content screening system modeled after PICS, and a bibliographic vocabulary, such as the Dublin Core Initiative.

http://w3c.org/RDF/.

W3C Resource Description Framework-RDF Model and Syntax Specification.
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Resources--such as web ontology language (OWL), resource description framework schema (RDFS), and SPARQL, a resource description framework (RDF) query language--that are needed to structure and search information are presented.
Among detailed topics are knowledge organization systems and ontologies, the resource description framework, ontologies for representing ontologies, the ideal ontology discovery tool, approaches to building an ontology, interrogating ontologies for re-use, and the practical development of ontologies.
This includes four main types, from oldest to newest: tabular or flat file data, relational data, meta-markup (such as XML), and resource description framework (RDF).
An RDF query language is a computer language, specifically a query language for databases, able to retrieve and manipulate data stored in Resource Description Framework format.
They cover terminology and basic concepts; structured metadata in XML; authoring and validating XML; and metadata crosswalks; XML, transformations, and resource description framework (RDF) XML.
Most popular traditional Ontology representation languages for knowledge representation in Semantic Web are CycL DOGMA (Developing Ontology-Grounded Methods and Applications), F-Logic (Frame Logic), KIF (Knowledge Interchange Format), Ontolingua based on KIF, KL-ONE, KM programming language, LOOM (ontology), OCML (Operational Conceptual Modelling Language), OKBC (Open Knowledge Base Connectivity), PLIB (Parts LIBrary), RACER, DAML+OIL, Ontology Inference Layer (OIL), Web Ontology Language (OWL), Resource Description Framework (RDF), RDF Schema, and SHOE (5).
He then describes the elements of the semantic web, the resource description framework (RDF), the RDF in taxonomy and ontology, the web ontology language and its validation, rela-world applications such as Swoogle and Friend of a Friend, the transition from web services to semantic web services, upper ontologies, web service descriptions, and search engines.
It is based on the Resource Description Framework (RDF), which integrates a variety of applications using XML for syntax and URIs for naming.
The two most important technologies for developing the Semantic Web are eXtensible Markup Language and the Resource Description Framework.
A "History" file, consisting of metadata stored in Resource Description Framework (RDF) format, that is updated with each significant event in the system (for example, when an item is updated or a bitstream changed).
Peter Alesso and research engineer Craig Smith, Developing Semantic Web Services presents the complete Language Pyramid of Web markup languages, including Resource Description Framework (RDF), Web Ontology Language (OWL) and OWL-Services (OWL-S), along with numerous examples and software demos.
The World Wide Web Consortium have announced final approval of two key Semantic Web technologies, the revised Resource Description Framework (RDF) and the Web Ontology Language (OWL).

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