Building of Networks of Natural Hierarchies of Terms Based on Analysis of Texts Corpora

The method of building a network of natural terms hierarchy is proposed which may be regarded as "quasiontology", i.e. the basis for corresponding terminological ontology formation. Natural terms hierarchy network of is based on «significantly informative» text elements, the reference words and phrases. The methodology to identify such terms is given in [1, 2]. The use of such elements can form search images and cover the whole knowledge bases for the further common ontology construction. Reference words and phrases for natural terms hierarchy construction are selected with taking into account the discriminant power. However, one of the properties is not sufficient for the construction of thesauruses and ontologies. Sometimes words with low discriminant power, in particular, the most frequent words of the given subject area (e.g., "Information", "Retrieval", "Search" words in the information retrieval body) are essential for a task that is considered.