search, World Web Wide, uncertainty, relevance, index, crawler

An analyse of contemporary situation in the area of webpage searching with an emphasis on identification of possible sources uncertainty and an analyse of their coverage is a basic contents of this report. The report attends to the construction of search engine, to the construction of search indexes, to methods of evaluation of relevance webpages and to the identification of reasons which can lead to an effort to treat an uncertainties and identifications of places and processes where possible sources of uncertainties can occur. This paper contains the proposed model, which is now being tested through LFLC.