Testing templates / reusable widgets; responsibility for 3rd party content

[sajkaj]

Detlev Fischer on October 14 commented on:
[https://w3c.github.io/wcag/conformance-challenges/#challenge-3-3rd-party-content](Challenge #3)
It can also provide / mandate user input templates (e.g. define a meaningful heading, require alt text of uploaded images) to constrain the well-formedness of user-generated content to some degree? Most of the issues
coming from this corner seem comparatively minor compared to faults with navigation, with dynamic widgets / focus handling, form markup & error handling etc.
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For third parties in terms of advertisers, the site owner can publish and enforce entry criteria (e.g. "we only accept ad animation no longer than 5 secs OR a control to stop it"). My guess is that it is profit
interests, not technical limitations, that may stop site owners from imposing such third-party content rules.
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Alastair Campbell on October 14 commented:
I think the guidelines need to stay neutral about what entity would be responsible, all they can evaluate is whether the interface for the user is accessible. In the UK/EU responsibility comes from the
legislation/regulations, the guidelines are the measure.
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Jake Abma on October 15 commented:
is it always up to third parties? Great example is the BBC which provides accessibility guidance for third parties they MUST follow or otherwise be excluded.
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Alastair Campbell on October 15 commented:
That is to be encouraged, but some locations have laws that define it, so we shouldn't.

[sajkaj]

Merged into 943