Community
Participate
Working Groups
The OCF (Open Container Format) specification (http://idpf.org/epub/20/spec/OCF_2.0.1_draft.doc) states that one can add multiple publications to one EPUB. For instance an OEBPS (aka EPUB) and one PDF. Or two OEBPS publications in different languages. While the current API does handle this – the Ant task does not. This should be implemented as the only other way of doing this would be through the API.
The Ant task syntax should be backwards compatible so both the new and the old format should be allowed. For instance: <epub> ... ops content </epub> and <epub> <ops> ... ops content </ops> <file name="content.pdf" type="application/pdf"/> </epub>
Moving to new EPUB component.
Apparently most reading systems have issues with this feature so for practical reasons it makes little sense to investigate it further. There may be changes or additions to the EPUB specification at a later stage in which case this issue can be revisited. See https://groups.google.com/d/topic/epubcheck/QLeWFm9bn04/discussion Resolving as WONTFIX.
Closing - no further work will be done on this for EPUB 2.x at least.