Retrieve the name, location and room rate for hotels with a room rate equals to
$200
[Name Location Price] of (AND hotel (FILLS Price 200))
DL query ==> Mappings
DL query ==> Multi-repository mappings
Multi-repository mappings ==> several mono-repository mappings
Access to data repositories
Mono-repository mappings ==> queries in Local Query Language (LQL)
Execution of LQL queries
Access data using wrappers
Applying transformer functions
Obtaining final answer using an auxiliar database
Presentation of answer to the user
Name
Location
Price
Mercure
Berlin, Germany
200
Ritz
London, England
200
After accessing the International Accommodation Ontology the user is not
satisfied with the answer. For this reason ask for
more data expanding the query to other
ontologies.