other_boolean_form ::= {collection_name.EXISTS (index) | { cursor_name | cursor_variable_name | :host_cursor_variable_name | SQL }%{FOUND | ISOPEN | NOTFOUND} | expression { relational_operator expression | IS [NOT] NULL | { [NOT] LIKE pattern | [NOT] BETWEEN expression AND expression | [NOT] IN (expression [, expression]... ) } }