W3C MarkUp Validator Feedback

Please collect links to feedback on the MarkupValidator here. Please add proper titles to URI-only links.

Usability

Add MIME-type suggestion field

Planning

Write the MarkupValidator/Roadmap, and with every item how people can help

New Features

provide a "try your valid content with the ..... MIME-type"-link (so basically providing a sort of proxy, cause webservers sometimes serve content with wrong MIME-type, SVG content being an example)

Here's some PHP-code that serves valid SVG with the image/svg+xml MIME-type, otherwise giving the validator result:

<?php 
if ($url!=""){
        $error=1;
        $reportURL="http://validator.w3.org/check?uri=".urlencode($url);
        $feedback=file_get_contents($reportURL);
        $valid_svg='2 class="valid">This Page Is Valid SVG 1.1!</';
        if (substr_count($feedback,$valid_svg)==1){
                if (substr_count($feedback,"Warning")==0){
                        if (substr_count($feedback,"Error")==0){
                                header("Content-type: image/svg+xml");
                                echo(file_get_contents($url));
                                $error=0;
                        }
                }
        }
        if ($error!=0) header("Location: $reportURL"); /* When the non-perfect W3C-validator doesn't like it: "no SVG for you!" */
}else{
        header("Content-type: text/html");
        echo('
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
        <head>
                <title>SVG MIME proxy</title>
                <style type="text/css">
                        body{
                                text-align:center;
                        }
                </style>
        </head>
        <body>
                <h3>your URL?</h3>
                <form method="GET" action="">
                        <input type="text" name="url" value="http://" size="50"><br>
                        <input type="submit" value="go serve this as image/svg+xml">
                </form>
        </body>
</html>
');
}
?>

which is running at http://svgopen.steltenpower.com/2004/svgproxy.php, also callable through bookmarklet: javascript:location.href=("http://svgopen.steltenpower.com/2004/svgproxy.php?url="+escape(location.href));

provide a "make the URL end with .svg to force IE to recognize it as such"-link

PHP-code

<?php 
if ($url!=""){
        $len=strlen($url);
        if (substr($url,($len-4))!=".svg"){
                if (substr_count($url,"?")>0) $url.="&";
                else $url.="?";
                $url.="IEloves=.svg";
        }
        $proxyURL="http://svgopen.steltenpower.com/2004/svgproxy.php?url=".urlencode($url);
        header("Location: $proxyURL");
}else{
        header("Content-type: text/html");
        echo('
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
        <head>
                <title>SVG in IE</title>
                <style type="text/css">
                        body{
                                text-align:center;
                        }
                </style>
        </head>
        <body>
                <h3>your URL?</h3>
                <form method="GET" action="">
                        <input type="text" name="url" value="http://" size="50"><br>
                        <br>
                        <input type="submit" value="go make IE recognize this as SVG">
                </form>
        </body>
</html>
');
}
?>

which is running at http://svgopen.steltenpower.com/2004/SVGinIE.php, also callable through bookmarklet: javascript:location.href=("http://svgopen.steltenpower.com/2004/SVGinIE.php?url="+escape(location.href));

provide a "try your valid SVG content in a webstarted Squiggle"-link in case of SVG content
- A webstarted Squiggle is now available at http://arc.mcc.id.au/batik-nightly/, also callable through bookmarklet: javascript:location.href=("http://arc.mcc.id.au/batik-nightly/webstart/squiggle.pl?uri="+escape(location.href));
provide a "try your valid SVG content as PNG, PDF, etc"-link in case of SVG content
- similar to http://www.ionicsoft.com/demo/svg.jsp
...