wsbpel-comment message

Subject: non-XML format message (soap with attachment)

From: "Jingfeng Li" <bpel.oasis.brook@gmail.com>
To: wsbpel-comment@lists.oasis-open.org
Date: Thu, 25 Jan 2007 15:50:59 +0800

In the current version of the spec, it implies that the message is XML
format.
The "validate" can be used to perform the validation checking of the XML
format
message.

But, what happens if the message is a soap with attachment? For example, how
to check its format, or do something like query some part of its?