I have: \setvariables [Book] [ title={My title}, subtitle={My subtitle}, author={First Author, Second Author and Third Author}, ] \setupinteraction [ title=\getvariable{Book}{title}, subtitle=\getvariable{Book}{subtitle}, author=\getvariable{Book}{author}, keyword={keyword1, keyword2, keyword3}, ] and this yields (in acroread 9): Title: My title Author: "First Author, Second Author and Third Author" Subject: My subtitle Keywords: keyword1 keyword2 keyword3 So, quotation marks (" ") get put around the author; The subtitle becomes the subject; and adding the trailing comma after keyword={}, indeed removes the {} but also removes the explicit commas. Alan