Re: Open Container Format and Multiple Renditions

Multiple renditions have not had a ton of uptake in EPUB-land.

The ability to specify more than one rendition is part of EPUB 3.2:
https://w3c.github.io/publ-epub-revision/epub32/spec/epub-ocf.html

However, the rendition selection mechanism from "EPUB Multiple-Rendition
Publications 1.0 (http://www.idpf.org/epub/renditions/multiple/)" is not
included in EPUB 3.2, however it remains a valid auxiliary specification.

Best,
   Garth


On Thu, Jul 26, 2018 at 7:13 AM Adam Sobieski <adamsobieski@hotmail.com>
wrote:

> EPUB 3 Community Group,
>
>
>
> Greetings. The Educational Exercises and Activities Community Group has
> recently launched and is interested in the Open Container Format technology.
>
>
>
> Quoting from the group’s wiki (
> https://www.w3.org/community/exercises-and-activities/wiki/Main_Page):
>
>
>
> “Educational exercises and activities can be composed of hypertext and
> other multimedia files. Educational exercises and activities can also be
> collections of such files in ZIP containers. Both unpackaged and packaged
> scenarios are in scope for this group.
>
>
>
> “ZIP containers for educational exercises and activities could utilize the
> Open Container Format with a new variety of package file.
>
>
>
> “Multiple variants, or renditions, of an educational exercise or activity
> can be provided within a ZIP container. Reasons for so doing include
> portability, accessibility and internationalization. Such variants, or
> renditions, could be described by package files referenced in container.xml
> files, references differentiated via extensible XML attributes or media
> type parameters. Such variants, or renditions, could also be semantically
> interrelated in metadata, e.g. in metadata.xml files.”
>
>
>
> That is, non-mutually-exclusive possibilities for implementing multiple
> variants or renditions in an OCF ZIP container appear to include:
>
>
>
> 1. Multiple renditions can be described via XML attributes on <rootfile>
> elements in container.xml files.
>
> 2. Multiple renditions can be described via media type parameters in the
> value of the media-type attribute on <rootfile> elements in container.xml
> files.
>
> 3. Multiple renditions can be interrelated in metadata.xml files.
>
>
>
> With respect to approach 1, I found EPUB Multiple-Rendition Publications
> 1.0 (http://www.idpf.org/epub/renditions/multiple/). Is this
> recommendation going to be a part of EPUB 3.2 OCF?
>
>
>
> Thank you for any information with respect to multiple variants or
> renditions of content for portability, accessibility and
> internationalization in OCF-based ZIP containers.
>
>
>
>
>
> Best regards,
>
> Adam Sobieski
>
>
>