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SVG2 role and RDFa attributes

From: Dr. Olaf Hoffmann <Dr.O.Hoffmann@gmx.de>
Date: Fri, 17 Jan 2014 10:59:12 +0100
To: www-svg@w3.org
Message-Id: <201401171059.12634.Dr.O.Hoffmann@gmx.de>

in the SVG2 draft the role attribute is mentioned, but the definition seems to 
deviate from that of SVG tiny 1.2.
The definition of SVG tiny 1.2 allows to use CURIEs to reference an 
appropriate vocabulary.
The role referenced in SVG2 seems to restrict this to a small set of
values, defined only by ARIA.

If we take into account, that for example SVG has no elements with
semantical meaning for text elements and ARIA does not even mention
role items corresponding to (X)HTML elements (or elements from DAISY,
TEI, LML etc) with semantical meaning, there is currently surely a big
gap for the usage of the role attribute for text in SVG to indicate the 
semantical meaning.
ARIA seems to have almost no role items with semantical meaning for
graphical shapes as well, therefore there might be a need for a specific
vocabulary of graphical structures for some authors as well.

Therefore I suggest to align the definition of role in SVG2 with that of 
SVG tiny 1.2 to have a more useful attribute for SVG. 

In the SVG2 requirements it was accepted to have the RDFa attributes
in SVG2 as well as in SVG tiny 1.2. Currently they still seem to miss.
This could be an alternative to the usage of the role attribute as well,
if present - will this be added as agreed?

Received on Friday, 17 January 2014 09:59:41 UTC

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