https://bugs.documentfoundation.org/show_bug.cgi?id=95328

--- Comment #3 from [email protected] ---
(In reply to V Stuart Foote from comment #2)
> First thought was to close as wontfix, and still leaning that direction.
> 
> Our current Poppler driven Hybrid PDF is generated as PDF 1.4 and is
> sufficient, and yes it appends our source ODF to PDF. It is not attached to
> the document, but that feature of PDF comes in at PDF 1.7 with ISO 32000-1
> compliance.

Last half sentence is not factually correct. The feature to attach files to a
PDF was specified in PDF-1.3 for the first time. See table 169, item
"FileAttachments" on page 390 of the Adobe version of the PDF-1.7 spec
(filename "PDF32000_2008.pdf").

> Believe our Poppler integration is capable of generating that level of PDF,
> but suspect it would  would require a lot of work.

I do not think so. It should be no more difficult than the current
("proprietary") implementation that is used by OpenOffice and LibreOffice.

(There may be other arguments which could be made in favor of keeping it as it
is, and make sure no other application could extract the embedded ODT source
file. But I haven't heard any so far...)

> However, other than this issue of reworking our Hybrid PDF, more pressing
> compliance issues of producing accessible PDF/A-1a and PDF/UA (ISO 14289-1)[
> bug 45636 ] probably already require a more complete implementation of ISO
> 32000-1 and production of PDF 1.7 level documents.

* PDF/UA: Nes, that requires support for PDF-1.7.

* PDF/A-1a: No PDF/A-1b (basic) and /A1-a (advanced) both even *forbid* to use
any new features beyond PDF-1.4 and up to -1.7. They *require* limitation to
PDF-1.4 features (and have a few other feature requirements and prohibition of
features).

However, to produce a PDF/UA does not require to support *ALL* features which
have been introduced and defined in between and up to 1.4 and 1.7. It is just
so that if you want to make a compliant PDF/UA, you'll have to support *some*
of the new features, which in turn means you have to declare it as a PDF-1.7
file.

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