: Accessing_and_Documenting_Relational_Databases_through_OWL_Ontologieshttp://purl.org/semsur/ Create a prefix for http://purl.org/semsur/ Hit Enter to save Double click to create a prefix | : yearhttp://swrc.ontoware.org/ontology# Create a prefix for http://swrc.ontoware.org/ontology# Hit Enter to save Double click to create a prefix | : SemSur/http://purl.org/ Create a prefix for http://purl.org/ Hit Enter to save Double click to create a prefix |