One thing I have problems with is that symbols in arc-f don't have the most obvious string representation: e.g. (string 'type) ==> "<arc>type", (string 'atype) ==> "<User>atype". This gives me quite a few troubles while developing artk (http://github.com/stefano/artk/) because it heavily relies on the string representation of symbols to make a bridge between Arc and the TCL interpreter. As a consequence I have to use a lot the 'unpkg function.
