- 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
Notice that the main plan considers applying the corresponding transformer functions to data coming from data repositories.
| Mapping for dbHotels Repository
|
| ALIAS | Mono-Repository Tree
|
| AUX-1
| 
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| AUX-4
| 
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| AUX-7
| 
|
| AUX-10
| 
|
| AUX-13
| 
|
| Mapping for XMLHotels Repository
|
| ALIAS | Mono-Repository Tree
|
| AUX-2
| 
|
| AUX-5
| 
|
| AUX-8
| 
|
| AUX-11
| 
|
| AUX-14
| 
|
| Mapping for WebSearchHotels Repository
|
| ALIAS | Mono-Repository Tree
|
| AUX-3
| 
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| AUX-6
| 
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| AUX-9
| 
|
| AUX-12
| 
|
| AUX-15
| 
|
- Access to data repositories
- Presentation of answer to the user
