If you are looking at using the cXML protocol handler you might want to look at maintaining it or extending it. If so you should look to the cXML user guides which published the message formats and patterns for the cXML messages. You can find the latest at the cXML download site. http://cxml.org/files/downloads.html

You will find the latest there so you should refer to them there. But I’ve found a few over time so providing a link so you can see some of the different versions so you can download them from my share.

• cXML User Guide version 1.2.031
  • August 2016
  • https://1drv.ms/b/s!AjyKH96OSFD9gQV68Au8wWrXnfHN
• cXML User Guide version 1.2.028
  • July 2015
  • https://1drv.ms/b/s!AjyKH96OSFD9gQRBVVrdrLgEMX5O
• cXML User Guide version 1.2.025
  • April 2014
  • https://1drv.ms/b/s!AjyKH96OSFD9gQL6Wi_i4NiXoEYQ
• cXML User Guide version 1.1
  • June 2000
  • https://1drv.ms/b/s!AjyKH96OSFD9gQP22n33o6FszdkI
• cXML User Guide version 1.0
  • August 1999
  • https://1drv.ms/b/s!AjyKH96OSFD9gQAg-Ifb9IIYpqy6

As well one of the solution guides published by Ariba is handy reference to cXML. You can find a copy here

• cXML Solutions Guide version 1.2.021
  • January 2011
  • https://1drv.ms/b/s!AjyKH96OSFD9gQEtfZNfU3Uv6KJY

Cheers

Lachlan