By contrast, searching a document set can result in various, even multiple, correct answers, some of which are more correct than others. For example, if you search for documents that contain one or more of a string of words, some documents might contain more of the words than other documents, and thus be better matches. A specialized technology known as full-text search , solves the problem of searching a document repository. An example of full-text search is the advanced search features of Web sites like Excite. The Verity Text Search DataBlade module extends your Informix database with full-text search.
Boolean search Uses a Boolean expression to find documents that contain specific words.
Phrase search Finds documents that contain a specific phrase. Proximity search Finds documents that contain a specific group of words in any order, in close proximity. Fuzzy search Finds documents that contain slight variations of specific words. Fuzzy searches are also known as pattern searches. Ranking A fuzzy search that ranks results by relevance.