A Keyword-Based on Semantic Web Search Engine
Web search engines have become one of the most helpful tools for obtaining useful information from the Internet. The most popular search engines cannot produce satisfactory Web search results. Web search engine is a crawler-based indexing and retrieval system for the semantic Web, i.e., for Web documents in RDF or OWL. It extracts metadata for each discovered document and computes relations between documents. The documents are also indexed by an information retrieval system which can use keywords to find relevant documents and to compute the similarity among a set of documents. One of the properties computed for each semantic Web document is its rank, a measure of the documents importance on the semantic Web.