Official PDF URLs for X Specs

Markus Kuhn Markus.Kuhn at
Thu Apr 24 12:08:08 PDT 2008

I can read the source code of the latest head or released version of the
X11 spec at

but is there any URL that gives me the corresponding formatted PDF
version for easy reference?

What is the simple and always up-to-date URL that I give to people who I
want to point to the "X Window System Protocol" specification?

All I have found are older versions at

and odd *.PS.gz versions at

but nothing that looks like (nightly) autogenerated PDFs. I think this
would be very useful, and would encourage people to read (and perhaps
even update) these documents more frequently.

Why are there any formatted "hardcopy" *.PS.gz files in git at all?

Are these automatically updated?
If not, who ensures that they are updated?

Why is the archaic PS.gz format used and not the *much* more convenient
and portable PDF? (PDF compresses pages individually, is supported by
many vastly better on-screen viewers with search function, is supported
by widely-used HTTP browser plugins, and comes with a page index for
vastly more efficient HTTP access to individual pages!)


Markus Kuhn, Computer Laboratory, University of Cambridge || CB3 0FD, Great Britain

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