【71-75】websql is a sql-like （71） language for extracting information from the web. its capabilitiesforperforming navigation of web （72） make it a useful tool for automating several web-relatedtasksthatrequire the systematic processing of either all the links in a （73）， all the pages that canbereachedfrom a given url through （74） that match a pattern， or a combination of both. websql alsoprovidestransparent access to index servers that can be queried via the common （75）interface.
