| The
"Case-sensitive" and "Search-type" functions are
optional - if you leave them out, the search will default to no
case-sensitivity and exact search, (meaning a search for "TrIPod"
will find "Tripod") and exact search (in which a search for
"Tripod homepages" will
only produce exact matches). A
'Fuzzy' search will call up results with a matching prefix, so if you
search for 'the,', your search will also find "then"
and "thereabouts."
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' |
|