Studying evolution of a branch of knowledge by constructing and analyzing its ontology

Authors:
Pavel Makagonov;Alejandro Ruiz Figueroa;Alexander Gelbukh
Affiliations:
Mixteca University of Technology, Oaxaca, México;Mixteca University of Technology, Oaxaca, México;Center for Computing Research, National Polytechnic Institute, Mexico DF
Venue:
NLDB'06 Proceedings of the 11th international conference on Applications of Natural Language to Information Systems
Year:
2006

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Abstract

We propose a method for semi-automatic construction of an ontology of a given branch of science for measuring its evolution in time. The method relies on a collection of documents in the given thematic domain. We observe that the words of different levels of abstraction are located within different parts of a document: say, the title or abstract contains more general words than the body of the paper. What is more, the hierarchical structure of the documents allows us to determine the parent-child relation between words: e.g., a word that appears in the title of a paper is a candidate for a parent of the words appearing in the body of this paper; if such a relation is repeated several times, we register such a parent-child pair in our ontology. Using the papers corresponding to different years, we construct such an ontology for each year independently. Comparing such ontologies (using tree edit distance measure) for different years reveals the trends of evolution of the given branch of science.