Semantic Analyzing Technology of Web Document

Semantic technology can improve the analyzing accuracy of the Web documents.Two semantic technologies are introduced in this paper: concept semantic technology and formalization semantic technology.The concept semanteme based on non-negative matrix factorization is a novel method,which can consider the concept semantic accuracy and the complexity of algorithm.Ontology is a current formalization semantic technology.Ontology-based information systems suffer from the problem of ontology heterogeneity.It introduces the definitions of simplified multielement bounds to find the best approximations of the concepts,and presents the idea for searching the simplified multielement bounds.