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Re: Comments from PFWG on CSS3 Speech Module

From: James Craig <jcraig@apple.com>
Date: Wed, 26 Oct 2011 22:18:41 -0700
Cc: Janina Sajka <janina@rednote.net>, www-style@w3.org, Bert Bos <bert@w3.org>, List WAI Liaison <wai-liaison@w3.org>, List WAI PF <w3c-wai-pf@w3.org>
Message-id: <E8F586B5-BB94-4CA2-8884-8361B5D84C23@apple.com>
To: Daniel Weck <daniel.weck@gmail.com>

On Oct 16, 2011, at 4:25 PM, Daniel Weck wrote:

> Hello,
> there is an analogy between the volume levels that apply within the context of the "aural box model" defined by the CSS Speech specification, and the visibility of elements within the traditional CSS box model. In the visual world, invisible elements still
> occupy an area within the rendering space (i.e. the content is missing but the "box" is allocated nonetheless).
> Authors can use 'display:none' to properly "remove" content, and there is a similar feature in CSS3 Speech to properly deactivate an element within the aural dimension.
> Note that the 'silent' feature is compatible with the SSML model, and that one of the CSS-Speech design goals is to equip authors with mechanisms to represent equivalent SSML content (as best as possible).
> As for use-cases, the 'silent' value may be useful for fully fading volume levels in and out, or for authoring spoken text with "fill-in the blanks" empty spans. I am sure that are other valuable and creative usages though. :)
> Does this address your concerns?

I'm still not entirely convinced if this will be useful in the context of a screen reader, but I can see how this would be more useful, given the context of a talking book.
Received on Thursday, 27 October 2011 05:19:10 UTC

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