document: Position paper : ontology construction from online ontologies One of the main hurdles towards a wide endorsement of ontologies is the high cost of constructing them . Reuse of existing ontologies offers a much cheaper alternative than building new ones from scratch , yet tools to support such reuse are still in their infancy . However , more ontologies are becoming available on the web , and online libraries for storing and indexing ontologies are increasing in number and demand . Search engines have also started to appear , to facilitate search and retrieval of online ontologies . This paper presents a fresh view on constructing ontologies automatically , by identifying , ranking , and merging fragments of online ontologies .
doc_bio_tags: O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O