Abstract
The paper is to solve how to map OWL information model to database which is very important for sharing information. First, relatively complete and exact mapping rules with the consideration of OWL syntax and semantics is designed. Then, the mapping system from OWL to relational database is implemented based on Jena using Java. Finally, the mapping system is tested by some OWL examples. The mapping rules in this paper are lossless and canonical, and every element in OWL can be stored in the database. The mapping system is advanced, simply operable and robust.