SOAP, for some reason empathizes the multi-hop paradigm. I don't really understand its importance. Any thoughts?
For example, SOAP Message Transmission Optimization Mechanism says -
Use of the Abstract SOAP Transmission Optimization Feature is a hop-by-hop contract between a SOAP node and the next SOAP node in the SOAP message path, providing no mandatory convention for optimization of SOAP transmission through intermediaries.
<hop sequence="1" address="http://address1" />
<hop sequence="2" address="http://address2" />
<hop sequence="3" address="smtp://address3" />
<hop sequence="4" address="someotherprotocol://address4" />
just made that up
Is there a standard for this? Or is this provider-specific, i.e. the way to do it is different for Sun and IBM (for example)?