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The Tabulator Extension is an extension for Firefox that provides a human-readable interface for linked data. It is based on the Tabulator, a web-based interface for browsing RDF. Using Tabulator’s outline mode, query views, and back-end code, the Tabulator Extension integrates the browsing of linked data directly into the Firefox browser, making for a more natural and seamless experience when browsing linked data on the Web.

A primary goal of the Tabulator Extension is to explore how linked data could be displayed in the next generation of Web browsers. The Tabulator aims to make linked data human-readable by taking a document and picking out the actual things that the document describes. The properties of these things are the displayed in a table, and then the links in that table can be followed to load more data about other things in other documents.

A link to the latest version of the extension can be found on the Tabulator Extension site: The Tabulator Extension. Moreover, Tabulator is now hosted on addons.mozilla.org. If you download and install from there, it will provide automatic updates through the Firefox Addon Manager.

 

Once the extension file is downloaded, it should automatically install. After restarting Firefox, all documents served as application/rdf+xml and text/n3 (and for a while legacy documents served as text/rdf+n3) will be automatically loaded in the Tabulator’s outline view. It may be necessary to disable other RDF-related extensions that could override the Tabulator’s capture of these documents.

 

For more information, read this article : Tabulator: Exploring and Analyzing linked data on the Semantic Web

Oracle 10g Release 2 / Oracle 11g introduces the industry’s first open, scalable, secure platform to store RDF and OWL data. Based on a graph data model, RDF triples are persisted, indexed and queried, similar to other object-relational data types.

 

Oracle Jena adaptor software implements the well-known Jena Graph and Model APIs. (Jena is an Open Source framework developed by Hewlett-Packard and is available under a BSD-style license; see jena.sf.net for details.) It extends the capabilities of Oracle semantic data management (Oracle 10gR2 RDF and Oracle 11gR1 RDF/OWL) with a set of easy-to-use Java APIs. Enhancements have been done to the server side to accommodate those APIs.

 

Application developers can now use the power of the Oracle 11g Database to design and develop a wide range of semantic-enhanced business applications. Application areas include:

  • Life Sciences: Biological pathway analysis, discovery and enhanced search.
  • Defence & Intelligence: Data and content integration, reasoning and inference.
  • Enterprise Application Integration: Data and systems integration, semantic enterprise integration and semantic web services.
  • CRM/ERP: Supply chain integration, sourcing optimization and customer service automation.

 

Oracle Semantic Technologies Software Documentation

[1] Oracle Semantic Technologies Technical Presentation (PDF)

[2] Oracle RDF Overview

[3] Oracle Database 11gInference Best Practices with RDFS/OWL

[4] Semantic data management on Windows XP and configure semantic web technology support in Oracle 11g.

The Resource Description Framework (RDF) is a W3C Recommendation for the formulation of metadata on the World Wide Web. RDF Schema (RDFS) extends this standard with the means to specify domain vocabulary and object structures. These techniques will enable the enrichment of the Web with machine-processable semantics, thus giving rise to what has been dubbed the Semantic Web.

  

The basic building block in RDF is an subject-predicate-object triple, commonly written as P(S;O). That is, a subject S has an predicate (or property) P with value O. Another way to think of this relationship is as a labeled edge between two nodes: [S] –P–>[O].

  

The RDF data model provides no mechanisms for declaring vocabulary that is to be used. RDF Schema is a mechanism that lets developers define a particular vocabulary for RDF data (such as the predicate hasWritten) and specify the kinds of objects to which predicates can be applied (such as the class Writer). RDFS does this by pre-specifying some terminology, such as Class, subClassOf and Property, which can then be used in application-specific schemata.

 

RDFa was first proposed by Mark Birbeck in the form of a W3C note entitled XHTML and RDF, which was then presented to the Semantic Web Interest Group at the W3C’s 2004 Technical Plenary. RDF/A is a set of attributes used to embed RDF in XHTML. 

 

For more information, watch this video : http://www.youtube.com/watch?v=ldl0m-5zLz4

Moreover, have a look to the  presentation : RDFa – Bridging the Web of Documents and the Web of Data” that will be presented in ISWC2008.