official pdf reader

[Eric Feliksik]

What is the default pdf reader? I'm running hoary and I see 
ubuntu-desktop depends on both xpdf and gnome-gv, and gnome-gv does not 
depend on xpdf.

I assume gnome-gv is the official one, for now... I understand gnome-gv 
(gnome-ghostview) is frontend to ghostscript, which is for reading 
postscript, but I saw it can read pdf-documents as well.

It can't read 
http://www.pds.ewi.tudelft.nl/~tonino/IN2013/exams/20040622.pdf, 
however: ggv says it's an incorrect format. Well, of course that's 
possible, but xpdf can read it.

So I have 2 questions:

1) Is it correct that gnome-ghostview is the official pdf reader for 
Ubuntu, and that this is the application of the future?

2) Although it can be just said that a malformed pdf is a malformed pdf, 
would anyone (maybe ggv developers) be interested in a pdf (like the on 
of the url) that could be handled in a better way?

Thanks,

Eric