What is function calc_quality() for?

Question

What is that for?

        function calc_quality($content, $format)
        {
            if ($format=='html')
                return 1.0;
            elseif ($format=='')
                return 0.8;
            else
                return 0;
        }

Answer 1

Found it at http://www.question2answer.org/modules.php?module=viewer

calc_quality($content, $format) should return a numerical value indicating your viewer's ability to render the supplied $content in $format, as retrieved from Q2A's database. You should return 1.0 to indicate perfect ability, and 0.0 for complete inability. For each piece of content, the viewer module returning the highest value will be used.