[whatwg] Conformance checking of missing alternative content for images

Jukka K. Korpela jkorpela at cs.tut.fi
Tue Aug 21 23:16:35 PDT 2012

2012-08-22 3:43, Ian Hickson wrote:

> [...] the
 > argument is that WYSIWYG editor implementors will be pressured into 
> their tools output conforming content by people who don't understand the
> subtlties of this thread, based purely on validator output.

To which extent do people pressure WYSIWYG editor implementors into 
that, who are these people, and is there evidence of the pressure being 
successful? How often have they made implementors generate alt="" for 
unknown images, instead of something appropriate like alt="(an image)"?

> A user converting 100,000 PDFs to HTML isn't going to be entering
> alternative texts for each image.

Such bulk conversions can be useful for many purposes, but the results 
are not accessible and do not conform to good HTML authoring rules. 
There is no reason to prevent validators from saying this, in their own 

Take the example of converting one non-HTML document with images to HTML 
format. Should the result of an automatic converter that generates <img> 
tags without alt attributes be considered as valid as the result of 
human conversion with alt attributes added or semi-automatic conversion 
(where a human is prompted for entering alt texts)?


More information about the whatwg mailing list