While Web services will migrate toward SOAP 1.2 in the near future, the most prevalent Web services technology today is the now deprecated SOAP 1.1. Although there isn't a great deal that has changed between the two revisions, there are some caveats we must be aware of when dealing with SOAP 1.1-based systems. To ensure that the work we've invested in understanding SOAP 1.2 isn't lost on SOAP 1.1 systems, we shall finish our coverage of SOAP with a set of notes that should make our SOAP 1.2 knowledge backwardly compatible with SOAP 1.1.
 These notes are abridged from the SOAP 1.2. Primer document which can be found at: http://www.w3.org/TR/2002/WD-soap12-part0-20020626/