- Query Edition
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.
