he will choose from the keyword list 1-3 keywords for one PDF
So, if I'm understanding, the list will be used while editing metadata as now occur with the quick edit metadata history list.
This give me the idea to provide an additional list, linked to a external text file the user can choose, accessible from an additional tabsheet in the same quick edit metadata history list panel. Something similar to your idea too?
you have to "registrate" and then take the first file from the top.
the xml is containing the Keywords
You already have the file at your place so open it in a text editor, copy some lines and paste here in a forum message so we all can see it.
I'm not going to develop a filter to parse a specific xml file format, only if more people appear interested in this subject and I manage to develop a versatile xml importer specific to this task of keyword list generation.
My idea is to list an external text file, so you will need to preprocess your specific xml to generate the plain, keywords by line, text file.
This task of xml parse to get a specif tag contents to a text file is a relative easy subject and I'm sure there are many tools already available to do that. If none available, we can easily code a script (javasccript as example) to do the task.