“Metadata” is a certain type of data that hold some key information about a file. When considering the file’s integrity, they’re not always terribly important (they are sometimes!). For instance, when you click on an audio file in a music manager, it shows you a lot of data about it such as the Artist, Album name, Year, Genre, Comments etc. It’s the metadata of that audio file that holds those information.
So even if the meta data is somewhat corrupted, most of the time the audio should work but metadata has few varieties and depending on the file’s type, the importance of the metadata has a major role to play sometimes.
PDF files too uses its own metadata type for inserting data such as Author, Publisher, Copyright data, restricting copying the text or setting the permissions (these type of metadata has a major role to play concerning a file’s integrity)etc.
Now most of the time you can use a PDF manipulator like PDF Chain for editing (including splitting) metadata. But since it’s more than a metadata editor and if all you want is something quite simple and dedicated only for that task, then you can try “GPDFtool”.
But please remember that, currently this utility only supports French language. So no English version available. Now I too don’t know the first thing about French (I can barely speak English :/) but because this utility is so simple and intuitive even though I don’t know any French, yet within like few minutes I got used to it!.
It also integrates into the Nautilus file manager’s context menu so you can open PDF files directly from it.
Main features …
*. Currently there are no “debs” packages. But you can just double click on the executable file to run it. Or if you use Nautilus as your file manager, then you’ll love its Nautilus Script which makes the whole thing a hell lot easier.
*. Reads and shows you the metadata of a PDF file: Creator, Title, Producer, Author, Created date, Keywords, Subject etc (and editing them).
*. Manually add new fields (if PDF doesn’t have an author property for instance).
*. Shows you a basic structure of the PDF file (bookmarks, pages, Titles, Chapters etc).
*. Adjust “security” or permissions of a PDF file such as: Change Owner, enable/disable copying the content, change the printing quality, enable/disable modifying the content, ModifyAnnotations etc.
*. A “log” output.
*. And finally save the new PDF file in a different location.
If interested you can run it in Ubuntu easily (works in 11.10 Oneiric Ocelot, 11.04 Natty Narwhal, 10.10 and should also work in 10.04 and other older versions too I think) by following the below procedure.
1. Now this tool actually uses a PDF manipulating library called PDFtk and we have to install it first. For that please use the below command.
sudo apt-get install pdftk
2. Now that’s done please visit this GPDFTool forum page (it’s created by an Ubuntu French forum contributor called “AnsuzPeorth”) and get the file first. It’s in French and if you can’t find it easily, then please get it from this Googlecode page (it’s compressed).
3. Then open that file and extract the content somewhere (let’s say in your “Home” folder for instance).
4. Now go into that folder and double click on the file named “go_GPDFTool.sh”. When asked simply choose “Run” and it should open the GPDFtool. That’s it!.
For those who use Nautilus …
However I recommend that you also install the Nautilus script since it lets you right click on any PDF file and edit its metadata. For that, once inside that folder, you’ll see another folder called “nautilus-script”.
5. Now go inside of that folder and double click on the file named “install_nautillus-script.sh”. When asked choose “Run in Terminal” and it’ll automatically install that script and exit the Terminal window. That’s it.
Let’s hope the developer releases an English version in the future as well (big thanks goes to “AnsuzPeorth” for creating the app). That’s it.