Elucidation of human behaviour in electronic enviroments is vital for managerial and marketing purposes, resource allocation, and design of efficient and user friendly WEB based platforms and services.The article presents a novel formalism allowing effective extraction and examination of human behavioral patterns at elementary and more complex levels. The approach was applied to extraction and analysis of knowledge workers browsing behavior on a large corporate intranet. Several relevant behavioral characteristics of knowledge workers have been revealed. We demonstrated also user classification and projections to various observation domains which enable further knowledge discovery about user browsing attributes.