| The text search engine allows queries to be formed from arbitrary
Boolean expressions containing the keywords AND, OR, and NOT, and grouped with
parentheses. For example: |
|
| information retrieval |
finds documents containing 'information' or 'retrieval'
|
|
| information or retrieval |
same as above
|
|
| information and retrieval |
finds documents containing both 'information' and 'retrieval'
|
|
| information not retrieval |
finds documents containing 'information' but not 'retrieval'
|
|
| (information not retrieval) and WAIS |
finds documents containing 'WAIS', plus 'information' but not
'retrieval'
|
|
| web* |
finds documents containing words starting with 'web'
|