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DOAP: Description of a Project. C Opens Data on the Web with SPARQL. Powerful Technology for Querying Distributed and Diverse Data Contact Americas, Australia -- Ian Jacobs, <ij@w3.org>, +1.718.260.9447 or +1.617.253.2613 Contact Europe, Africa and the Middle East -- Marie-Claire Forgue, <mcf@w3.org>, +33.492.38.75.94 Contact Asia -- Yasuyuki Hirakawa <chibao@w3.org>, +81.466.49.1170 -- 15 January 2008 -- W3C announced today the publication of SPARQL, the key standard for opening up data on the Semantic Web.

C Opens Data on the Web with SPARQL

"Trying to use the Semantic Web without SPARQL is like trying to use a relational database without SQL," explained Tim Berners-Lee, W3C Director. There are already 14 known implementations of SPARQL, many of which are open source. SPARQL Overcomes Traditional Query Language Limitations of Local Searches, Single Formats Many successful query languages exist, including standards such as SQL and XQuery. The goal of the Semantic Web is to enable people to share, merge, and reuse data globally. Intro to the Semantic Web. Views Datasource. Views Datasource is a set of plugins for Drupal Views for rendering content in a number of shareable, reusable formats based on XML, JSON and XHTML.

Views Datasource

These formats allow content in a Drupal site to be easily used as data sources for Semantic Web clients and web mash-ups. Views Datasource plugins output content from node lists created in the Drupal Views interface in a variety of formats - XML data documents using schemas like OPML and Atom, RDF data documents using a vocabulary like FOAF, JSON data documents in a format like Exhibit JSON, and XHTML data documents using a microformat like hCard. Views Datasource can be thought of as a userland complement to the work going on in the Services and RDF APIs as a site operator only needs to know Views to be able to create datasources in the different formats. The project consists of 4 Views style plugins (and related row plugins): Swoogle Semantic Web Search Engine.

Tim Berners-Lee Says the Time for the Semantic Web is Now - Read. In an hour long interview posted today about the Semantic Web, W3C Director Tim Berners-Lee says all the pieces are in place to move full steam ahead and realize the potential of a world of structured, machine readable data.

Tim Berners-Lee Says the Time for the Semantic Web is Now - Read

Available as a part of the Talking with Talis semantic web podcast series, the interview (listen here) is summarized on interviewer Paul Miller's new ZDNet blog dedicated to the semantic web. A full transcript is available here. It's an important conversation and a good introduction to what the semantic web is. Also notable is the way that Berners-Lee sees Semantics and Data Portability as very related. Some highlights are excerpted below. My standard explanation of the value of the Semantic Web is this: Once our software is capable of deriving meaning from web pages it looks at for us, then there's a whole lot of work that will already be done, allowing our human, creative minds to reach new heights.

On the topic of challenges still faced, Berners-Lee said: RDF-Gravity. Sunil Goyal, Rupert Westenthaler {sgoyal, rwestenthaler}@salzburgresearch.at Salzburg Research, Austria Download RDF Gravity RDF Gravity (v1.0): Click here to launch the online demo (~10 MB download).


IsaViz Overview. News IsaViz and Java 1.6 (2007-10-21) IsaViz 2.x is not compatible with Java 1.6 or later.

IsaViz Overview

It is recommended to download IsaViz 3.0 which does work with any version of Java. An alpha release is available (see Download section), which should be as stable as IsaViz 2.1 except for the new, still under development, Fresnel and FSL features. IsaViz and GraphViz (2007-05-23) IsaViz 2.x is not compatible with GraphViz 2.10 or later. Several bugs have been fixed in the FSL engines for Jena, Sesame and the visual FSL debugger embedded in IsaViz. Fresnel in IsaViz (2006-05-19) IsaViz 3.0 now supports Fresnel lenses and several elements of the Core Format Vocabulary. What Is RDF. What Is RDF by Joshua Tauberer | Pages: 1, 2, 3 Triples for Knowledge RDF provides a general, flexible method to decompose any knowledge into small pieces, called triples, with some rules about the semantics (meaning) of those pieces.

What Is RDF

The foundation is breaking knowledge down into a labeled, directed graph. Each edge in the graph represents a fact, or a relation between two things. The edge in the example from the node vincent_donofrio labeled starred_in to the node the_thirteenth_floor represents the fact that actor Vincent D'Onofrio starred in the movie "The Thirteenth Floor. " The six documents composing the RDF specification tell us two things. Most of the abstract model of RDF comes down to four simple rules: A fact is expressed as a Subject-Predicate-Object triple, also known as a statement. You've seen statements already. Entities are named by Uniform Resource Identifiers (URIs), and this provides the globally unique, distributed naming system we need for distributed knowledge.