[NTG-context] Insertion of a Document I.D.

I want to generate a document i.d. from the .tex source filename and the current date and put it into the footer. This might be possible already, but I could find it by searching the wiki for filename and document it, or rather too much since filename is mainly used for command line parameters, etc. I know the \currentdate will give the current system date part that I can use, but is there any \filename type command for the master filename, so that a document i.d. could be generated automatically. e.g. \filename\currentdate Regards