| Operator | |
|---|
| + | The word is mandatory in all text returned. |
| - | The word cannot appear in any text returned. |
| < | The word that follows has a lower relevance than other words, although text containing it will still match |
| > | The word that follows has a higher relevance than other words. |
| () | Used to group words into subexpressions. |
| ~ | The word following contributes negatively to the relevance of the text (which is different to the '-' operator, which specifically excludes the word, or the '<' operator, which still causes the word to contribute positively to the relevance of the text. |
| * | The wildcard, indicating zero or more characters. It can only appear at the end of a word. |
| " | Anything enclosed in the double quotes is taken as a whole (so you can match phrases, for example). |