Ontologies, taxonomies, thesauri:learning from texts
Christopher A. Brewster, Yorick Alexander Wilks · Aston Publications Explorer (Aston University) · 2004
The use of ontologies as representations of knowledge is widespread but their construction, until recently, has been entirely manual. We argue in this paper for the use of text corpora and automated natural language processing methods for the construction of ontologies. We delineate the challenges and present criteria for the selection of appropriate methods. We distinguish three major steps in ontology building: associating terms, constructing hierarchies and labelling relations. A number of methods are presented for these purposes ut we conclude that the issue of data-sparsity still is a major challenge. We argue for the use of resources external tot he domain specific corpus. 1 1