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Ontologies have long been considered the core of semantics as they offer shareable and reusable knowledge about a particular domain. Improving and sharing domain specific knowledge residing in a database is one of the key challenges faced while developing any application. Due to the ever growing amount of data on the Web, it is almost impossible to extract meaningful data and the amount of manual work during creation of ontology poses series of challenges. And researchers are facing challenges such as the unavailability of well-formed databases, domain expert's help for extracting cardinality restrictions and generation of un-resolvable URIs.
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