When I try to consume a non Mendix webservice that uses a CDATA tag I run into problems. From this post (https://forum.mendix.com/link/questions/7350) it seems that Mendix escapes CDATA when using custom bodies. I might be wrong here but in my opinion this is a bug and Mendix should not touch the characters in the CDATA tag.
From other forum post it seems I am not the only one struggling with the CDATA tag (try searching on CDATA to see all the posts) so I would be nice if this tag gets full support from Mendix.
Regards,
Ronald