<data type="string">
<documentation xml:lang="en" xml:space="preserve">A query
The syntax is as follows (described in terms of [CSS grammar](https://www.w3.org/TR/CSS21/grammar.html)):
query
: feature*
;
feature
: '(' S* IDENT S* [ ':' S* value ]? ')' S*
;
value
: string | integer | IDENT
;
</documentation>
<param name="pattern">^\s*(\(\s*[_a-zA-Z][_a-zA-Z0-9-]*(\s*:\s*([_a-zA-Z][_a-zA-Z0-9-]*|'[^']*'|"[^"]*"|0|-?[1-9][0-9]*))?\s*\)\s*)*$</param>
</data>