document: Factal : integrating deep web based on trust and relevance We demonstrate `` Factal '' -- a system for integrating deep web sources . Factal is based on the recently introduced source selection method `` SourceRank '' ; which is a measure of trust and relevance based on the agreement between the sources . SourceRank selects popular and trustworthy sources from autonomous and open collections like the deep web . This trust and popularity awareness distinguishes Factal from the existing systems like Google Product Search . Factal selects and searches active online databases on multiple domains . The demonstration scenarios include improved trustworthiness , relevance of results , and comparison shopping . We believe that by incorporating effective source selection based on the SourceRank , Factal demonstrates a significant step towards a deep-web-scale integration system .
doc_bio_tags: O O O B I O O O O O O O O O O O O O O O B I O O O O O O O O O B I O O B O O O O O O O O O O O O O O O O O O B O O O O O O O O O O O O B I O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O B I O O O B O O O O O O O O O O O O