University of Texas at Arlington
The vision of the semantic web is to create a web of data with well-defined meaning. Most data in the current web is managed by relational databases. Thus, it is imperative for the semantic web community to offer easily implemented solutions to bridging relational database content and RDF. Direct mappings means to use the SQL schema to create an OWL ontology and use it to represent the data in RDF. Direct mapping methods have an advantage that they are, intrinsically, automated. If a SQL-schema was created using contemporary model-driven software engineering tools, the resulting OWL ontology can be semantically rich.