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Re: [css3-speech] square brackets group

From: Daniel Weck <daniel.weck@gmail.com>
Date: Sat, 11 Dec 2010 00:29:55 +0000
Message-Id: <4F641C4E-41F8-47DA-B756-34719BBD9DD6@gmail.com>
To: www-style@w3.org, Bjoern Hoehrmann <derhoermi@gmx.net>
FYI, the issue is now filed into the tracking system:

http://www.w3.org/Style/CSS/Tracker/issues/150

/Dan

On 10 Dec 2010, at 23:51, Daniel Weck wrote:

>
>
> On 10 Dec 2010, at 23:09, Bjoern Hoehrmann wrote:
>> Yes, but if you consider square brackets to represent grouping,  
>> then the
>> examples in the draft do not match the grammar, `voice-family: male  
>> 2`
>> for instance is not valid because <age> is not optional but omitted  
>> in
>> the example. However, it would match if you read (some of the) square
>> brackets to represent optionality. I do agree that the Working Group
>> does not seem to have addressed my comment yet.
>
>
> The <age> and <number> fields of the "voice-family" CSS 3 Speech  
> property [1] were added to the fields specified by CSS 2.1 Aural  
> style sheets [2].
>
> There seems to be a typo in the CSS 3 grammar indeed, as the  
> examples are correct (they are backward compatible with the CSS 2.1  
> notation).
>
> I would suggest the following errata (line breaks for clarity, "xxx"  
> is the exact duplicate of line #2):
>
> ----------------
> [xxx,]*
> [[<specific-voice> | [<age>? <generic-voice>]] <number>?]
> | inherit
> ----------------
>
> ...but actually I am questioning the use of the <number>  
> discriminator based on a <specific-voice>. I can understand the  
> selection logic based on a <generic-voice>, but I am not sure how  
> the "preferred variant" heuristics can apply to a specific voice  
> instance. Therefore I hereby present the errata of the errata:
>
> ----------------
> [xxx,]*
> [<specific-voice> | [<age>? <generic-voice> <number>?]]
> | inherit
> ----------------
>
> Comments welcome.
> Regards, Daniel
>
> [1]
> http://www.w3.org/TR/css3-speech/#voice-family
>
> [2]
> http://www.w3.org/TR/CSS21/aural.html#propdef-voice-family
Received on Saturday, 11 December 2010 00:30:31 GMT

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