- From: Sebastian Zartner via GitHub <sysbot+gh@w3.org>
- Date: Thu, 01 Sep 2016 07:36:40 +0000
- To: public-svg-issues@w3.org
> We had decided to match the CSS definition of `<length>` with the
one exception that in a presentation attribute, only, a unitless
number is always allowed as an alternative to a length or an angle.
That is defined in the [value syntax
section](https://svgwg.org/svg2-draft/types.html#syntax) (after
Annotation 1, starts "When a presentation attribute…").
This makes it hard to get to know the correct syntax and makes it even
incorrect insofar that `<length>` values still link to the CSS Values
and Units Module instead of the SVG definition.
I suggest to introduce new types for those values, e.g.
`<length-number>` and `<angle-number>` similar to [how Values and
Units did it for percentage
values](https://drafts.csswg.org/css-values-3/#typedef-length-percentage)
and additionally make use of the `<*-percentage>` values where
appropriate.
So, e.g. the [syntax for the `x` and `y` attributes of text
elements](https://svgwg.org/svg2-draft/text.html#TextElementXAttribute)
might then look like this:
[[ <length-percentage> | <length-number> ]+ ]#
or even
[ <length-percentage-number>+ ]#
Sebastian
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Received on Thursday, 1 September 2016 07:36:52 UTC