| + |
A leading plus sign indicates that this word must be present in search returned. |
| - |
A leading minus sign indicated that this word must not be present in any search returned. |
| >< |
The two operators are used to change a word's contribution to the relevance value that is assigned to a search. the > operator increases the contribution and the < operator decreases it. |
| () |
Parentheses are used to group words into subexpressions. Parenthesized groups can be nested. |
| ~ |
A leading tilde acts as a negation operator, causing the word's contribution to the search relevance to be negative. It's useful for making noise words. A result that contains such a word is rated lower than others, but is not excluded altogether, as it would be with the - operator . |
| " |
A phrase that is enclosed within a double quote (" ") characters matches only results that contain the phrase literally, as it was typed. |
