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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
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.