Are SVG-extensions of CSS usable as part of EPUB style sheets?

[GoogleCodeExporter]

I propose to allow the use of SVG extensions of CSS in EPUB stylesheets 
assuming that we use CSS Namespaces.

Original issue reported on code.google.com by eb2m...@gmail.com on 9 Apr 2011 at 2:42

[GoogleCodeExporter]

The WG is in full agreement regarding this; the ContentDocs draft has been 
worked on to clarify that EPUB CSS Stylesheets are not an expression of 
constraints of what might occur in physical CSS files. Assigning to Matt to 
point out where changes have been made (and add any additional clarifications, 
if needed).

Original comment by markus.g...@gmail.com on 11 Apr 2011 at 8:12

• Changed state: Accepted

[GoogleCodeExporter]

To recap the current spec prose:

CSS namespaces support was added in r2777 (see Section 3.3.8 in Content Docs)

Section 3.1 Content Conformance was earlier revised to state regarding EPUB 
Style Sheets:

It may include constructs not explicitly identified in the EPUB 3 CSS Profile, 
but should be authored so that rendering fidelity does not depend on such 
additional constructs.

This statement was intended to broaden the definition so that constructs (like 
SVG extensions) would not be illegal.

Section 3.2 Reading System Conformance was likewise made more liberal with the 
following addition:

Reading Systems may support additional CSS constructs not explicitly identified 
in the EPUB 3 CSS Profile, and must handle any unsupported constructs as 
defined in [CSS2.1].

The following requirement was also recently added to Section 2.3.4 (SVG) 
Reading System Conformance to flesh out SVG CSS support:

If it has an SVG Viewport, it must support the visual rendering of SVG using 
CSS as defined in Section 6 of [SVG], and it should support all properties 
defined in Appendix N of that specification. In the case of embedded SVG, it 
must also conform to the constraints defined in Embedded SVG and CSS.

Those are the key sections in the specification currently dealing with SVG and 
CSS.

Original comment by mgarrish on 18 Apr 2011 at 11:03

[GoogleCodeExporter]

Thus, there are no statements that the EPUB CSS Profile describes restrictions 
on what is allowed to appear in physical CSS files. Murata, can we close this 
issue, or do you want to see further clarification?

Original comment by markus.g...@gmail.com on 20 Apr 2011 at 10:01

[GoogleCodeExporter]

Closing this issue as we have had no requests for further clarification in 6 
days.

Original comment by markus.g...@gmail.com on 26 Apr 2011 at 6:59

• Changed state: Fixed