SW Search: Swoogle

I found a semantic web search engine names swoogle (Semantic Web Ontology) lately. It's interesting that you can consume the search service using the provided web service API and admit own links to semantic web documents.

Swoogle crawl the World Wide Web for a special class of web documents called Semantic Web documents, which are written in RDF. Currently, it provides the following services to the following services:

• search Semantic Web ontologies
• search Semantic Web instance data
• search Semantic Web terms, i.e., URIs that have been defined as classes and properties
• provide metadata of Semantic Web documents and support browsing the Semantic Web. (Please refer to Li Ding et. al., Finding and Ranking Knowledge on the Semantic Web, ISWC'04 for details)
• archive different versions of Semantic Web documents

Currently, Swoogle only indexes some metadata about Semantic Web documents. It neither stores nor searches all triples in an Semantic Web documents as a triple store.