Ilmari Karonen schreef:
URL + MIME type, plus possibly some explanatory text, should really be enough for any CAPTCHA. They're supposed to be pretty self-explanatory anyway.
One could even use "data:" URLs for short in-line CAPTHAs if one wanted.
Text responses (text/plain for SimpleCaptcha and text/tex for MathCaptcha) are currently presented using the 'question' field rather than the 'url' field.
Roan Kattouw (Catrope)