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Re: SVG12: Vendor-specific presentation attributes

From: Chris Lilley <chris@w3.org>
Date: Wed, 2 Nov 2005 14:36:38 +0100
Message-ID: <184865969.20051102143638@w3.org>
To: www-svg@w3.org

Hello www-svg,

BH>   http://www.w3.org/TR/2005/WD-SVGMobile12-20050413/struct.html does
BH> not seem to include adequate requirements for vendor-specific
BH> presentation attributes even though these apparently may be defined

We are unable to discover anywhere in the specification that allows a
custom, vendor-specific property to be defined.

BH> and implemented in conforming implementations. Please change the
BH> draft such that either this is not allowed (e.g., only "attributes"
BH> not "properties" may be used for extensions)

This is the current situation. Furthermore, such attributes must be
qualified, if they are on an element which is in the SVG namespace. So,
we believe the specification to already be clear in this regard.

BH>  or such that it is
BH> required that such properties must conform to
BH> http://www.w3.org/TR/CSS21/syndata.html#q4

Although interesting, and perhaps something to consider for a future
specification, such a method would require a means to declare:

- that the attribute is in fact a property
- whether it is inheritable or not
- the value space
- use of percentages
- computed value

We do not plan to add this functionality in this version of the
specification.

Please let us know within two weeks if this explanation does not satisfy
your comment.

-- 
 Chris Lilley                    mailto:chris@w3.org
 Chair, W3C SVG Working Group
 W3C Graphics Activity Lead
 Co-Chair, W3C Hypertext CG
Received on Wednesday, 2 November 2005 13:36:43 GMT

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