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Semantic Web Stack - Wikipedia, the free encyclopedia
The Semantic Web Stack is an illustration of the hierarchy of languages, where each layer exploits and uses capabilities of the layers below. It shows how technologies that are standardized for Semantic Web are organized to make the Semantic Web possible. It also shows how Semantic Web is an extension (not replacement) of classical hypertext web. As shown in the Semantic Web Stack, the following languages or technologies are used to create Semantic Web .
Resource Description Framework (RDF): Concepts and Abstract Synt
The Resource Description Framework (RDF) is a framework for representing information in the Web. RDF Concepts and Abstract Syntax defines an abstract syntax on which RDF is based, and which serves to link its concrete syntax to its formal semantics. It also includes discussion of design goals, key concepts, datatyping, character normalization and handling of URI references.
RDF/XML Syntax Specification (Revised)
The Resource Description Framework ( RDF ) is a general-purpose language for representing information in the Web. This document defines an XML syntax for RDF called RDF/XML in terms of Namespaces in XML , the XML Information Set and XML Base . The formal grammar for the syntax is annotated with actions generating triples of the RDF graph as defined in RDF Concepts and Abstract Syntax . The triples are written using the N-Triples RDF graph serializing format which enables more precise recording of the mapping in a machine processable form. The mappings are recorded as tests cases, gathered and published in RDF Test Cases .Abstract The Resource Description Framework (RDF) is a general-purpose language for representing information in the Web. This specification describes how to use RDF to describe RDF vocabularies.
RDF Vocabulary Description Language 1.0: RDF Schema
Abstract This is a specification of a precise semantics, and corresponding complete systems of inference rules, for the Resource Description Framework (RDF) and RDF Schema (RDFS). RDF is an assertional language intended to be used to express propositions using precise formal vocabularies, particularly those specified using RDFS [ RDF-VOCABULARY ], for access and use over the World Wide Web, and is intended to provide a basic foundation for more advanced assertional languages with a similar purpose.
RDF Semantics
Copyright © 2004 W3C ® ( MIT , ERCIM , Keio ), All Rights Reserved. W3C liability , trademark , document use and software licensing rules apply. One of the deliverables specified in Charter of the RDF Core Working Group is: a set of machine-processable test cases corresponding to technical issues addressed by the Working Group . This document describes the test cases that fulfill that deliverable but it does not contain the test cases themselves. The test cases are available at http://www.w3.org/2000/10/rdf-tests/rdfcore/ . The RDF Interest Group and other members of the RDF community have identified issues/ambiguities in the [ RDFMS ] Specification and the [ RDF-SCHEMA ] Candidate Recommendation.
RDF Test Cases
The Resource Description Framework (RDF) is a language for representing information about resources in the World Wide Web. This Primer is designed to provide the reader with the basic knowledge required to effectively use RDF. It introduces the basic concepts of RDF and describes its XML syntax. It describes how to define RDF vocabularies using the RDF Vocabulary Description Language, and gives an overview of some deployed RDF applications. It also describes the content and purpose of other RDF specification documents. 1.