Semantic Web & RDF

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Sioc-project.org | Semantically-Interlinked Online Communities. vCard | Strategies for Building Semantic Web Applications. The latest vCard Ontology for describing People and Organisations now includes a JSON-LD example.

vCard | Strategies for Building Semantic Web Applications

An Ontology for vCards ( ) is hosted at W3C and maintained by Harry Halpin and Norm Walsh. Representing vCard Objects in RDF (W3C Member Submission 20 January 2010) has the following additional comments Team Comment on "Representing vCard Objects in RDF" Submission hCard Microformat and VCard: See also - Portable Contacts ( ) See also - Nepomuk, these are the ontologies in use at dev.nepomuk.semanticdesktop.org and partly at nepomuk.kde.org: Index of /hhalpin/homepage. Introducing Linked Data And The Semantic Web. Next: Introducing Graph Data What is Linked Data and the Semantic Web and what is all the hype about?

Introducing Linked Data And The Semantic Web

Principally, the Semantic Web is a Web 3.0 web technology - a way of linking data between systems or entities that allows for rich, self-describing interrelations of data available across the globe on the web. In essence, it marks a shift in thinking from publishing data in human readable HTML documents to machine readable documents. That means that machines can do a little more of the thinking work for us. What Does This Mean How It Does It Differ From The Web As It Is Today? Publications of the W3C Semantic Web Activity. This page lists the latest versions of all W3C Recommendatations and Notes that have been published by the various Semantic Web Activity Groups or relevant Incubator Groups.

Publications of the W3C Semantic Web Activity

For a more complete lists of specifications, including older, obsolete versions and drafts, see the general page on W3C documents. See also the list of translations for RDF, GRDDL, RDFa, RDB2RDF, SPARQL, OWL, POWDER, PROV, and RIF You may want to look at the collection of SW Case Studies and Use Cases to see how organizations are using these technologies today. Resource Description Framework (RDF) Resource Description Framework (RDF) Semantic technologies.

RDF Vocabulary Description Language 1.0: RDF Schema. Abstract The Resource Description Framework (RDF) is a general-purpose language for representing information in the Web.

RDF Vocabulary Description Language 1.0: RDF Schema

This specification describes how to use RDF to describe RDF vocabularies. This specification defines a vocabulary for this purpose and defines other built-in RDF vocabulary initially specified in the RDF Model and Syntax Specification. Publications of the W3C Semantic Web Activity. This page lists the latest versions of all W3C Recommendatations and Notes that have been published by the various Semantic Web Activity Groups or relevant Incubator Groups.

Publications of the W3C Semantic Web Activity

For a more complete lists of specifications, including older, obsolete versions and drafts, see the general page on W3C documents. See also the list of translations for RDF, GRDDL, RDFa, RDB2RDF, SPARQL, OWL, POWDER, PROV, and RIF You may want to look at the collection of SW Case Studies and Use Cases to see how organizations are using these technologies today. Resource Description Framework (RDF) A Direct Mapping of Relational Data to RDF. Status of this Document This section describes the status of this document at the time of its publication.

A Direct Mapping of Relational Data to RDF

Other documents may supersede this document. A list of current W3C publications and the latest revision of this technical report can be found in the W3C technical reports index at.

Ontology

R2RML: RDB to RDF Mapping Language. This document describes R2RML, a language for expressing customized mappings from relational databases to RDF datasets.

R2RML: RDB to RDF Mapping Language

Such mappings provide the ability to view existing relational data in the RDF data model, expressed in a structure and target vocabulary of the mapping author's choice. R2RML mappings are themselves RDF graphs and written down in Turtle syntax. R2RML enables different types of mapping implementations. Processors could, for example, offer a virtual SPARQL endpoint over the mapped relational data, or generate RDF dumps, or offer a Linked Data interface. 1 Introduction.