I think I need more flexibility than what document variables offer, but maybe I'm wrong.
The way I understand document variables is that one externally defined value is inserted at the document variables place, such as the author's name or so.
What I require is the ability to select upon insertion of the field/document variable one or more values from a list of keywords and to store these in the document. What is more, there may be multiple keyword lists and also some free-text fields.
The process should be easy enough so that a document editor can also maintain the associated metadata through Word.

Perhaps I would have to develop a plugin that opens a form where the metadata is captured and which then stores the metadata in a field/document variable.
Would that be a feasible approach?

thanks
Kurt