In Mac os x would it not make sense to allow not currently open documents to come onto the dock? Why is this not part of the UX?
closed as not constructive by ChrisF, Matt Obee, JohnGB, alexeypegov, Benny Skogberg Mar 17 '13 at 20:06
As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance.If this question can be reworded to fit the rules in the help center, please edit the question.
I may not be fully understanding the question; so, I will try to answer with my interpretations of it.
In a nutshell, you can add individual, unopened files to the Dock - the same way we add just about anything to the Dock - and remove it the same way. However, the primary purpose of the Dock is for Applications and Directories (the Trash being a directory itself) - http://support.apple.com/kb/ht2474 - not individual files (the Dock would/could get very cluttered, very quickly - not good UX).