Semantic-based data integration model applied to heterogeneous medical information system

In this paper, we apply semantic web-based technologies to integrate heterogeneous data from medical information system, and design a heterogeneous data integration model, which combines Mediator/Wrapper framework with ontology, using OGSA-DAI as data accessing middleware. Mediator provides uniform query interface, decomposes user queries based on the mapping relations between global ontology and local ontologies. Wrapper receives subqueries and...