WebSQL is a SQLlike （）language for extracting information from the weB.Its capabilities for performing navigation of web （）make it a useful tool for automating several webrelate dtasks that require the systematic processing of either all the links in a （）， all the pages that can be reached from a given URL through （）that match a pattern， or a combination of both.WebSQL also provides transparent access to index servers that can be queried via the Common（）Interface.