Web Focused Crawling based on Ontology

To retrieve information from web we use Google, Yahoo and MSN which are more famous search engines. Search engine is one tool to locate into on the www. It search for and identifies items in database with reference to keywords entered by user (where we get relevant data also which is not exact what we which is time consuming).For web crawling we use focused crawler which based on ontology architecture. Focused crawler search for web pages having more page rank for user requirement. Where ontology is a specification about domain. It is a part of artificial intelligence. Also web pages on site are liked with ontology structure. In pepper we use Focused Crawler and Ontology for exact service related site.