The lack of uniformity in Web documents, and the sheer volume of Web data make conventional information retrieval techniques inadequate for management of Web data. Now comes Web Community, essentially a set of Web-based documents with consistent logical structure. The authors explain how to construct and analyze Web communities, introduce and explain the necessary algorithms, and examine successful existing applications. This book provides researchers and students in information retrieval and Web search with all the necessary basics and methods to create and understand Web communities, and adapt the samples provided for to new designs and implementations.