Web 3.0 is generally defined as Semantic Web technologies that run or are embedded within large-scale Web applications, writes Jim Hendler, assistant dean for information technology at Rensselaer Polytechnic Institute. He points out that 2008 was a good year for Web 3.0, based on the healthy level of investment in Web 3.0 projects, the focus on Web 3.0 at various conferences and events, and the migration of new technologies from academia to startups. Hendler says the past year has seen a clarification of emerging Web 3.0 applications. "Key enablers are a maturing infrastructure for integrating Web data resources and the increased use of and support for the languages developed in the World Wide Web Consortium (W3C) Semantic Web Activity," he observes.
The application of Web 3.0 technologies, in combination with the Web frameworks that run the Web 2.0 applications, are becoming the benchmark of the Web 3.0 generation, Hendler says. The Resource Description Framework (RDF) serves as the foundation of Web 3.0 applications, which links data from multiple Web sites or databases. Following the data's rendering in RDF, the development of multisite mashups is affected by the use of uniform resource identifiers (URIs) for blending and mapping data from different resources. Relationships between data in different applications or in different parts of the same application can be deduced through the RDF Schema and the Web Ontology Language, facilitating the linkage of different datasets via direct assertions. Hendler writes that a key dissimilarity between Web 3.0 technologies and artificial intelligence knowledge representation applications resides in the Web naming scheme supplied by URIs combined with the inferencing in Web 3.0 applications, which supports the generation of large graphs that can prop up large-scale Web applications.
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