Web Content Mining, Web Structure Mining, and Web Usage Mining. Web content mining is the process of extracting knowledge from the content of documents or their descriptions. Finally, web usage mining, also known as Web Log Mining, is the process of extracting interesting patterns in web access logs. Web Content Mining Web content mining is an automatic process that goes beyond keyword extraction. The usual approach to exploit known structure in documents is to use wrappers to map documents to some data model.
Techniques using lexicons for content interpretation are yet to come.
Web can reveal more information than just the information contained in documents. For example, links pointing to a document indicate the popularity of the document, while links coming out of a document indicate the richness or perhaps the variety of topics covered in the document. This can be compared to bibliographical citations. When a paper is cited often, it ought to be important. By means of counters, higher levels cumulate the number of artifacts subsumed by the concepts they hold.