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Under Annotation I expect some information on PDF-Annotations, not about software that can edit or import PDFs to annotate. Are PDF-annotations vector or pixel or both? How are highlights stored or why does highlighing not work with scanned documents but with scanned documents plus OCR? Do I need PDF/1.7 or does PDF/1.3 support all of this?-- (talk) 17:30, 9 August 2013 (UTC)

--> look at XFDF (talk) 10:55, 24 August 2013 (UTC)

It seems that ISO 32000-2 had been cancelled[edit]

See Trilemma2 (talk) 20:15, 12 August 2013 (UTC)

This is a rather old comment, but afaict the standard has not been canceled, in fact it's in draft as of 16 July 2016; see: ISO 32000-2.2. Mcswell (talk) 17:08, 2 November 2015 (UTC)

Conversion problem[edit]

I never understood why a text PDF cannot be simply saved from PDF reader as RTF file that can be edited by virtually any word processor. OK, 3rd party apps can do this, but the result is not exactly the same as the original. Mazarin07 (talk) 23:23, 21 September 2013 (UTC)

Full function PDF[edit]


"Full function PDF" looks non-English. Is it actually used in any source or is it an invention of an editor?

Best regards,
Codename Lisa (talk) 06:14, 21 October 2013 (UTC)

  • On the page VII of ISO 32000 (freely published by Adobe) is the following sentence: "ISO 32000 is an ISO standard for the full function PDF; the following standards are for more specialized uses. PDF/X (ISO 15930) is now the industry standard ..."[1] Leonard Rosenthol from Adobe also calls ISO 32000 as an "ISO PDF umbrella" - for PDF/A, PDF/X, PDF/E, PDF/UA (subsets of the full PDF specification).[2] -- (talk) 07:51, 21 October 2013 (UTC)

256-bit AES and Mac Preview[edit]

Would it be worth mentioning that PDF encrypted with 256-bit AES (e.g., by Pro Xi) cannot be opened by Mac Preview? JDAWiseman (talk) 18:39, 14 December 2013 (UTC)

Hi. If the opposite was true, it would have been worth mentioning. Best regards, Codename Lisa (talk) 04:54, 15 December 2013 (UTC)


According to HP's help forums, it seems that the HP printer languages PCLm and PCLmS are PDF1.7 with embedded fonts? If this is so should it appear in this article? -- (talk) 12:18, 4 January 2014 (UTC)

Heading "Standardized subsets of PDF" is wrong?[edit]

Surely this heading is wrong? I mean, PDF/A is not a subset of PDF; and neither is PDF/E. Are we stuck with the word "subset" for some historical reason, or could it be changed to something more meaningful such as "application"? MarcMFresko (talk) 14:27, 12 June 2015 (UTC)

Nope. PDF/A and PDF/E are, in fact, strict subsets of PDF. That is, they restrict the use of PDF features and do not add any features that PDF itself does not contain. Duff Johnson (talk) 22:53, 2 January 2018 (UTC)

External links modified[edit]

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Too technical.[edit]

Frankly, we don't need terms like "lossy" and "lossless" in this article. That's for a tech manual, not an encyclopedia. There are other such brain-busters as well. Yours in Wikidom, your friend, BeenAroundAWhile (talk) 12:36, 28 October 2016 (UTC)

A different person then writes:
actually this is valuable information. lossless data encoding or data compression means that the replication is as the original. This reminds me of truetype fonts which are vector descriptions of letters. I can imagine a person making a PDF where thay want to only use lossless compression
— Preceding unsigned comment added by (talk) 00:17, 17 December 2016 (UTC)

What is the future of PDF?[edit]

PDF has been around since the late-1990's. Is obsolescence in the future? While it remains a mainstream data format, will PDF still be readable 100 years from now? --2600:6C48:7006:200:D84D:5A80:173:901D (talk) 00:12, 19 March 2018 (UTC)

Take a look at this "Five visions of a PDF future". and "PDF Association".. PDF Association purpose is keeping PDF relevant. There are "3D PDF"., U3D as well as many available conversions anything to PDF. This article needs improving in my opinion as some sections to bring out more ISO standardization, possibly future as you mentioned and organize sections better. Gpeja (talk) 05:33, 27 August 2018 (UTC)

Requested move 8 April 2018[edit]

The following is a closed discussion of a requested move. Please do not modify it. Subsequent comments should be made in a new section on the talk page. Editors desiring to contest the closing decision should consider a move review. No further edits should be made to this section.

The result of the move request was: moved as requested. Dekimasuよ! 02:09, 15 April 2018 (UTC)

Portable Document FormatPDF – Per WP:COMMONNAME. feminist (talk) 02:49, 8 April 2018 (UTC)

  • Support PDF redirects there anyway, so there's no harm done.ZXCVBNM (TALK) 03:19, 8 April 2018 (UTC)
  • Support Obvious and should have been so since. –Ammarpad (talk) 15:00, 8 April 2018 (UTC)

The above discussion is preserved as an archive of a requested move. Please do not modify it. Subsequent comments should be made in a new section on this talk page or in a move review. No further edits should be made to this section.

How is pdf considered an open format since you need to pay for the spec ?[edit]

Maybe this needs to be clarified. E.g. open format? PDF-3200-2008:yes, PDF-3200-2008:no, or reference should be provided which should explain that a format can be considered open even if the maintainer requires paying for licensing usage of the spec.

In Open_format the first reference free_file_format states: "Thus, open format should refer to any format that is published for anyone to read and study but which may or may not be encumbered by patents, copyrights or other restrictions on use."

I don't think current PDF-2.0 meets the abbove requirement: "..published for anyone to read and study.."

My opinion is that current version of PDF is not an open format.

Furthermore in the absense of a document granting royalty-free rights to implementors (e.g. like in the old spec: ISO32000-1PublicPatentLicense ), specific mention on whether the format is free should be made in the article.

— Preceding unsigned comment added by Wikipiuser (talkcontribs) 08:37, 4 October 2018 (UTC)

PDF <2.0 is an open format, but 2.0 is not. I do however find it a little amusing that the spec is itself a PDF, creating a self-referential situation where you need to already have software that can understand PDF in order to read about how to understand it... (talk) 05:19, 24 March 2019 (UTC)


The section Conversions just provides a random and incomplete list of file formats. Most (all?) of these conversions will cause some loss of information, so they are not different from conversions in regards to any other file format. This whole section seems like a hidden advertisement for PDFTron. --Peter (talk) 15:45, 18 October 2019 (UTC)

We should include searchable PDF in this sction. There are lots of searchable PDF software converting images to searchable PDFs.