![]() I found out that JabRef is able to write XMP metadata. If you have just one or two PDFs to edit, this seems to be the perfect tool for you. It also has no batch processing capabilities. Sadly, the interface is not really usable in editing many PDFs in a row. It is basically a graphical user interface for the iText library, which is the same library that also powers the popular command-line tool pdftk. With jPdf Tweak, a Java application (runs under Linux, Windows, Mac OS X), you can edit nearly every PDF metadata and do much more. How to do this with Linux? I recently spent hours investigating this question. What about the simple metadata "author" and "title"? They're often used in desktop search engines and document management tools, so it would be nice to have correct metadata in PDFs (and PS and DjVu files, too). Okay, let's try to forget annotations for a moment. ( image "Emergency Exit" licensed from semanticwebcompany under a Creative Commons Attribution-Noncommercial-Share Alike 2.0 Generic license) General document metadata: author and title If someone knows a solution to this disaster, please tell me! Maybe the right direction is to put the Okular annotations optionally into the XMP stream and add this ability to Evince, too. That's why I'm either writing notes by hand, after printing the PDF, or I'm taking notes in the Tomboy note taking application. This problem is not yet solved even by Adobe: the Acrobat Reader (in it's professional variant) takes annotations in an obscure closed-source format, stored somewhere else than in the PDF itself. I want my metadata to be included in the PDF, in the XMP format. The disadvantage, however, is that I have to stick to one program (Okular) if I use Okular annotations. This has advantages and disadvantages, the advantage being that I can share the PDFs without sharing the annotations. ![]() These annotations are stored in an additional XML file. Maybe you have heard of the KDE application Okular, which allows annotations (Okular works fine under Linux and because of the nature of KDE4, it may even work under Windows and Mac OS X). ![]() Sadly, it is not as comfortable as Evince when it comes to reading PDFs - and in the end I want my notes to be exportable in some open format, so they won't get lost. And there is Xournal, a tablet PC application which is very comfortable when it comes to annotating PDFs. There is Evince, my favourite PDF/PostScript/DejaVu reader, but the project " annotations in Evince" hasn't come very far. There is PDFedit, which is slow and has a horrible user interface, obviously intended to be used to modify technical aspects of PDFs, not for fast annotation. On Linux there is no good system to annotate PDFs. (You might not want to read this if you're not using Linux or if you're not a developer) Today in the series "How to do XYZ with software?": Annotations and other metadata issues
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