    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]...
                        )
                    }
     }