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...A major feature of this full-fledged tool is the ability to produce structured ontologies with deeper hierarchies by exploiting both the database schema and the stored data.
RDBToOnto can be exploited to produce RDF Linked Data.
It can also be used to generate highly accurate RDB-to-RDF mapping rules (for D2RQ Server and Triplify).
Triplify provides a building block for the semantification of Web applications. Triplify is a small plugin for Web applications, which converts database content into RDF or JSON feeds and provides a Linked Data interface.