Swoogle is a search engine for Semantic Web documents. It extracts metadata for each discovered document, and computes relations between documents.
Discovered documents are also indexed by an information retrieval system which can use either character N-Gram or URIrefsas keywords to find relevant documents and to compute the similarity among a set of documents. One of the interesting properties we compute is rank, a measure of the importance of a Semantic Web document.
Swoogle makes use of a system of crawlers to root out RDF and Html documents with RDF content concerning all things having to do with this new vogue the semantic web. Swoogle figures out what’s meaningful about these docs and indexes all this data in its database. Furthermore, it extracts relational data between and amongst documents, for easier search and organization.