+1 for @svg:points. In spite of Sebastian's concerns about DTDs and
.xsd, I think this is the most elegant and standards-based approach.

On Wed, Mar 31, 2010 at 3:01 AM, Conal Tuohy <[log in to unmask]> wrote:
> On Wed, 10 Mar 2010 19:38:29 +0000, Sebastian Rahtz
> <[log in to unmask]> wrote:
>
>>On 10 Mar 2010, at 19:09, Martin Holmes wrote:
>>
>>>
>>> The simple answer is that all we need is @svg:points, added to
>>> att.coordinated.
>>>
>>
>>
>>ah, that's a nice idea. So we arrange it so that you get an extra
>>attribute if some sort of SVG module is loaded.
>
> I like this idea too. It's the simplest suggestion we've had so far which
> deals minimally with Martin's users' requirements. As Martin suggested, this
> isn't about adding an SVG drawing to the zone (which can be done in TEI
> already), with a coloured border, etc; it's actually more like a "clipping
> path" in the sense that it's a path which outlines an area of interest.
>
> The @path should be constrained (in the prose of the guidelines, at least -
> possibly also in schematron) to fall entirely within the bounding box. It
> should be defined to have the "SVG Points" data type:
> http://www.w3.org/TR/SVG/shapes.html#PointsBNF and including the semantics
> that it's a closed shape.
>
> If a need ever arose for zones with smooth curves, or for "compound" shapes
> (i.e. shapes with "holes" in them), we could add yet another attribute
> (@path, I'd suggest) with SVG's "path data" data-type:
> http://www.w3.org/TR/SVG/paths.html#PathData
>
> Finally, I think the rectangular bounding box co-ordinates should remain
> mandatory even when the optional @points (or @path) attribute is present.
> The reason is that they support base-line functionality for
> facsimile-enabled TEI processors. Of course theoretically a bounding box
> could be computed from the @points (or @path) attribute, but I tend to think
> we should require the TEI-encoding software to do this, so that we don't
> make it any harder to write software to display facsimile TEI.
>



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| John A. Walsh
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