Functional features:
Component databases are mediated by a RDF/OWL ontology. Queries are defined upon the ontology and rewritten into SQL queries to dynamically retrieve data from data sources which might have heterogeneous logic structures or physical properties.
A visualized semantic mapping tool is developed to facilitate defining mapping and transforming data from relational data structures to RDF/OWL ontologies. New database could be dynamically added and registered into the system.
The system provides an interactive interface to allow users to browse the ontologies and construct semantic queries against ontologies. Semantic search and navigation are also well-implemented.
Technical features: