Boolean operators In the free search, the following Boolean operators can be used:
AND
→ words separated by AND
must be present; OR
→ at least one of the words separated by OR
must be present; NOT
→ the word preceded by NOT
must not be present; *
(asterisk) → search for sentences containing words whose prefix is equal to the term preceding *
, ex:
decret*
search for decree, decrees, decree, etc; " "
(quotes) → search for the exact phrase between the quotes.
The operators can be combined, eg:
"state aid" AND "service contract"
and you can use parentheses to separate them, eg:
"injunction" AND (opposition OR appeal)