Eugene Inseok Chong Souripriya Das George Eadon Jagannathan Srinivasan Supporting Keyword Columns with Ontology-based Referential Constraints in DBMS. 95 2006 conf/icde/2006 ICDE http://doi.ieeecomputersociety.org/10.1109/ICDE.2006.151 db/conf/icde/icde2006.html#ChongDES06