Document type declarations for SMIL?

[murata2makoto]

EPUB media overlay uses a subset of SMIL. Although SMIL has DTDs, EPUB media overlay does not use them. Instead, MO has relied on RELAX NG, Schematron, and NVDL for validation. I thus propose not to allow SMIL DTDs in EPUB. Do people agree?

This issue is to create § B. Allowed External Identifiers as proposed in #1368.

[mattgarrish]

We're using a modified version of the DAISY profile, I believe, so I don't think it's really an option to specify a doctype in media overlay files.

/cc @marisademeglio @danielweck

[marisademeglio]

Media Overlays doesn't reference the DAISY profile, which, as far as I am aware, was never implemented in the real world. MO doesn't specify a baseProfile attribute and doesn't have a DTD. We don't explicitly prohibit a doctype declaration though.

[iherman]

This issue was discussed in a meeting.

• RESOLVED: Merge PR #1368 to address outstanding DTD issues, and close GH issues 1369-1373

View the transcript

Wendy Reid: we had resolutions at the F2F, and further discussions on github
… and came to a happy place
Matt Garrish: #1368
Matt Garrish: where we ended up was…
… we put in an allowance for a specific set of external identifiers that we have put in an appendix
… we have SVG and MathML that are allowed to be used in content docs or in separate files
… and we made a restriction against external entities in the internal DTD subset
… so it prevents some security issues but eases authoring
… so we’ll no longer force people to remove SVG DTDs from tool-generated files
… I’m hoping this is it :)
Ivan Herman: tech comment
… in fact, the changes are such that
… makes possible something that I’m not sure we really use
… I can define as part of an internal entity something that won’t go out to the network
… I’m not sure if this feature is in use
… formal comment
… there was a formal resolution on the previous version; this PR slightly changes that
… can we get a formal resolution to merge, and also close a bunch of issues which were examples of the problem?
Proposed resolution: Merge PR #1368 to address outstanding DTD issues, and close GH issues 1369-1373 (Wendy Reid)
Garth Conboy: +1
Matt Garrish: +1
Ivan Herman: +1
Charles LaPierre: +1
Matthew Chan: +1
Wendy Reid: +1
Brady Duga: +1
George Kerscher: +1
Laura Brady: +1
Bill Kasdorf: +1
Ben Schroeter: +1
Resolution #1: Merge PR #1368 to address outstanding DTD issues, and close GH issues 1369-1373