Hi, I only made some minor changes: - Inlined the namespace table; - Some minor text changes; - A couple of new comments; - A couple of suggestions for a minimal subset of entries for the undo operation - 3 suggestions to be precise - if people can think of others we can add these to the list. There are a number of NextGrid references in the document which is not surprising as the text came from there - just wondering what the final relationship with NextGrid is going to be. Anyone want to take up the write token? I've unlocked the document but have not been able to do as much as I would have liked to ... Mario +-----------------------------------------------------------------------+ |Mario Antonioletti:EPCC,JCMB,The King's Buildings,Edinburgh EH9 3JZ. | |Tel:0131 650 5141|mario@epcc.ed.ac.uk|http://www.epcc.ed.ac.uk/~mario/ | +-----------------------------------------------------------------------+