There is only a small amount of meta data (DTD definition) required to driv=
e=20
such a system=2E The kind of thing you scribbled may need a few refinements=
=20
but is essentially all that is required=2E In addition to a dynamic invocat=
ion=20
mechanism=2E
If one takes the view that the Object and thus it's serialised form (the=20
XML) IS the message / operation then it all just falls out=2E
As a general point it would be good to see XML become the standard for=20
object serialisation / migration and distributed messaging=2E Consider how=
=20
JINI / distributed services in general could become more open if all the=20
services, and calls were not only described in XML but could be invoked=20
using "XML Messaging"=2E
Graham=2E
gdm@dpsl=2Eco=2Euk
scheme / XML : the instance is the code