[tex-live] [pdftex] PDF 1.5 by default in TL 2010
joseph.wright at morningstar2.co.uk
Wed Jan 13 21:29:01 CET 2010
On 13/01/2010 20:11, Reinhard Kotucha wrote:
> > What 1.5 features are you talking about precisely? I'm not sure the ones
> > used in microtype.pdf are really standard 1.5... did you verify?
> As far as I understand the 1.5 spec, layers (OCG groups) were
> introduced in 1.5. This is what microtype.pdf is using. You can
> verify if you open the layers panel in a recent AR.
Quite true, and possibly shown only by Acrobat/Reader (for example,
Preview on Mac OS X doesn't seem to manage these). However, such
features are not relevant to the discussion about the default output
from TeX Live, as this type of thing does not appear simply by switching
from PDF-1.4 to PDF-1.5.
The key question is whether the features (essentially the compression
stuff) that does appear on adding
to a document which gives a fully-functional result without them.
Documents which use \special's, etc., to introduce PDF features directly
are going to potentially fail whether TeX Live produces PDF-1.4 or
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