From Just Solve the File Format Problem
Revision as of 06:22, 7 November 2012 by Dan Tobias (Talk | contribs)
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PDF, portable document format, based on PostScript and originally from Adobe, has many subsets.
As well as the 'full function' ISO 32000-1:2008 (or PDF 1.7) there is also PDF/X, PDF/A, PDF/E, PDF/VT and PDF/UA all of which are ISO specifications.
Unfortunately, ISO is a bunch of stodgy old dinosaurs who think "open standards" means to put standards documents behind an expensive paywall, so there's no current official standard that's freely linkable.
