Section 3.2 (Bindings) [1] states:

“Insertion of an XKMS message into the SOAP message structure must not alter namespace prefixes, or use of default namespaces, within the XKMS message. Any change in these encodings will likely break an XML Signature internal to the XKMS messages due to the use of QNames and namespace prefixes. The implementer must insure that prefix values used with the SOAP namespaces http://www.w3.org/2003/05/soap-envelope (SOAP 1.2) and http://schemas.xmlsoap.org/soap/envelope/ (SOAP 1.1) do not conflict with prefixes used in the XKMS message.”

I read this to suggest some form of ‘prefix-collision’, which I do not understand.  Is the intent is to make XKMS prefixes unique vs. soap prefixes, why?  How can a resolved URI of a prefix within the XKMS message created any issue with the soap:Envelope, soap:Body, or soap:Header.

[1] http://www.w3.org/TR/xkms2-bindings/#XKMS_2_0_Section_3_2