hypermedia affordances

To build on an analogy from Donald Norman, if XML�were analogous to a highway and XML spec creators (or MicroXML spec creators for that matter) analogous to highway (HyWay?�:-)�designers and engineers, then asking these to add affrodances for hypermedia would be like asking the highway designers to design the roadsigns too. The roadsigns are affordances which are certainly appropriate to a highway but including them in the highway design itself (the XML or MicroXML spec(s) by analogy) is inappropriate and best left to specialists. These specialists would take full account of the design of the road and�their work is pretty much determined by that design but they don't expect the raod design to include the roadsigns too. It's not for XML (or MicroXML) to include the hypermedia�affordances: The affordances are best�added by specialist affordance designers.