How to add copyright information to PDF metadata

Question

The Last(?) Word

I have now accepted @MatthewLeingang's answer. This directs me to the hyperxmp package, which appears to be the simplest solution (for me as a very-end user). The fact that this doesn't work in my  workflow and environment isn't Matthew's fault.

To chase the rest of my problem, which appears to involve a conflict with memoir, readers may be interested in this spin-off question.

Thank you all again for your help.

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Progress Update 1:

First, flouting convention, my sincere thanks to all who have answered or commented (duly upvoted). Special thanks to @diabonas, whose sample PDF does indeed contain a copyright notice.

However, there may be a clue here: while his PDF says this:

PDF Producer: XeTeX 0.9997

mine says this:

PDF Producer: xdvipdfmx (0.7.8)

Now, I'm processing it with XeLaTeX via latexmk, but to keep myself honest, I re-did it with just XeLaTeX, with the same result.

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Progress Update 2:

Here's an MWE that fails, and gives "PDF Producer: xdvipdfmx (0.7.8)":

% !TEX TS-program = XeLaTeX
% !TEX encoding = UTF-8 Unicode
\documentclass{memoir}
\usepackage{lipsum}
\usepackage{hyperref}
\usepackage{hyperxmp}
\hypersetup{
    pdfauthor={Brent Longborough},
    pdftitle={O Hai},
    pdfcopyright=Copyright © 2012 by Brent Longborough. All rights reserved.}
\begin{document}
\lipsum[1]
\end{document}

By just changing the document class to article, we get "PDF Producer: XeTeX 0.9997", and the copyright notice appears!

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Original Question:

Using XeLaTeX. I want to add two pieces of metadata to a PDF: copyrighted status and the copyright notice.

I'm already using hyperref in the document, and I have no special worries about "overheads", only about keeping the workflow simple.

On the principle of "monkey see, monkey do", I tried this to no avail:

\hypersetup{%
    pdfinfo={%
        CopyrightStatus={Copyrighted},
        CopyrightNotice={Copyright © 2012 by Brent Longborough}
        }
    }

So far, I have been unable to find the correct tag names, or to discover even whether I have a chance.

All suggestions are welcome, but I'd especially like a pointer to the book of tag names for PDF metadata.

---

The answers and comments from Martin and EGreg deserve some additional explanation on my part.

My PDF reader is PDF Xchange Viewer from Tracker Software. When I view the Document Properties, and select the "Additional Metadata..." button, a [third] window appears in which there appear a dropdown labelled "Copyright Status:", with options "Unknown", "Copyrighted", and "Public Domain"; and a text box labelled "Copyright Notice:":

So you can see the source of my half-blind groping for metadata tags...

So, I guess what I'm really asking is "What tag names should I be using to fill in these fields?"

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After hacking at the PDF (using @egreg's tip and then the viewer itself), I found the Copyright stuff in some RDF dc: namespace. I have since tried using the hyperxmp package, but without success (nothing shows up in the PDF), and I suspect that may be because it only works for pdfLaTeX.

---

I have also tried @MatthewLeingang's answer, but can confirm that it definitely requires pdfLaTeX, and I really don't want to go back.

Answer 1

As egreg notes, rights information is not part of the document information directory. But it can be included in the document's extensible metadata profile.

Here are two solutions that work with Adobe Acrobat and pdflatex. I don't know if you will see the metadata in the same place as you do with Acrobat; PDF XChange Viewer is a Windows app and I have a Mac so I can't test it.

Also (potential showstopper, wish I had noticed this earlier) neither solutions works with xetex. Perhaps they could be cajoled but that would require patching the package.

xmpincl

1. Make sure you have the xmpincl package. It's in TeX-live.

2. Create a basic XMP file like this:

    <x:xmpmeta xmlns:x="adobe:ns:meta/" x:xmptk="Adobe XMP Core 5.2-c001 63.139439, 2010/09/27-13:37:26        ">
       <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
          <rdf:Description rdf:about=""
                xmlns:xmpRights="http://ns.adobe.com/xap/1.0/rights/">
             <xmpRights:Marked>True</xmpRights:Marked>
          </rdf:Description>
          <rdf:Description rdf:about=""
                xmlns:dc="http://purl.org/dc/elements/1.1/">
             <dc:rights>
                <rdf:Alt>
                   <rdf:li xml:lang="x-default">Copyright (C) 2012 by Brent Longborough.  All rights reserved.</rdf:li>
                </rdf:Alt>
             </dc:rights>
          </rdf:Description>
       </rdf:RDF>
    </x:xmpmeta>

Let's call it copyright.xmp. If you want to grant more rights you can; you just need something more detailed. Creative Commons has a page to help you generate an XMP file.

3. Include this license file in your document like this:

   \documentclass{article}
   \title{My article}
   \author{Brent Longborough}
   \usepackage{xmpincl}
   \includexmp{copyright}
   \usepackage{lipsum}
   
   \begin{document}
   \maketitle
   \lipsum
   \end{document}
   

That's it! When I open the document in Adobe Acrobat I can see the copyright information in the expected place. If I select File > Properties ... and click on "Additional Metadata..." it's there.

hyperxmp

The hyperxmp implements extra document information keys pdfcopyright and pdfcopyrighturl that can be declared in much the same way as \pdfinfo keys. Under the hood it creates the XMP file for you. So you only need a file like this:

\documentclass{article}
\title{My article}
\author{Brent Longborough}
\usepackage{hyperref}
\usepackage{hyperxmp}
\hypersetup{
    pdfauthor={Brent Longborough},
    pdfcopyright={Copyright (C) 2012 by Brent Longborough.  All rights reserved.}
}
\usepackage{lipsum}

\begin{document}
\maketitle
\lipsum
\end{document}

Also doesn't work in xetex, though.

Answer 2

The main reference should be the "PDF Reference book", fourth edition, that on page 714 lists the known entry types for the document information dictionary:

Title, Author, Subject, Keywords, Creator, Producer, CreationDate, ModDate, Trapped

On page 713 it says

Note: Although viewer applications can store custom metadata in the document information dictionary, it is inappropriate to store private content or structural information there; such information should be stored in the document catalog instead (see Section 3.6.1, “Document Catalog”).

However, on page 882 (Appendix E), it says

Note: New keys for the document information dictionary (see Section 10.2.1, “Document Information Dictionary”) or a thread information dictionary (in the I entry of a thread dictionary; see Section 8.3.2, “Articles”) need not be registered.

Not the expected answer, I guess. PDF viewers won't know how to access the information, if they are not programmed to.

EDIT

With Adobe Reader X your keys are recognized:

Answer 3

Your code will work (as egreg points out) and write the keys and their values to the PDF info dict, but I don't know of any standardised keys for this information. You'll probably have better luck with XMP (sorry, Wikipedia is blacked out because of SOPA). There isn't much support for XMP with LaTeX, though.

Answer 4

If you have Perl available and the CPAN module Image::ExifTool installed, you can use

exiftool -@ copyright.txt pdffile.pdf`

where copyright.txt contains something like

-d
%Y
-copyright<Copyright ©$createdate, Brent Longborough

to create a dated copyright entry.

The advantages of this approach are that it can be easily automated and the copyright year is created automatically. Apart from the need to install the tool, the disadvantages are one more file to be maintained (but probably in a shared location) and one extra step when doing things manually.