an existing CCL field, a raw PQF string or a local limit. Leading string
determines type; either <literal>ccl:</literal> for CCL field,
<literal>rpn:</literal> for PQF/RPN, or <literal>local:</literal>
an existing CCL field, a raw PQF string or a local limit. Leading string
determines type; either <literal>ccl:</literal> for CCL field,
<literal>rpn:</literal> for PQF/RPN, or <literal>local:</literal>