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Re: Issue:soap:body binding description confusing when use is "literal"

From: Francisco Curbera <curbera@us.ibm.com>
Date: Thu, 9 May 2002 18:03:52 -0400
To: Prasad Yendluri <pyendluri@webmethods.com>
Cc: "WS-Desc WG (Public)" <www-ws-desc@w3.org>
Message-ID: <OF25021B65.6595321B-ON85256BB4.0077305D@pok.ibm.com>

Prasad,

As I recall it, the intended interpretation matches the one you found in
the WSDL yahoo groups list. I think there was some concern at the time with
failing to  fully specify the contents of the body element - as your
interpretation seems to imply.  I have to agree, though, that the whole
element/type issue is ready for a thorough review.

Paco

Prasad Yendluri <pyendluri@webmethods.com>@w3.org on 05/07/2002 07:23:03 PM

Sent by:    www-ws-desc-request@w3.org


To:    "WS-Desc WG (Public)" <www-ws-desc@w3.org>
cc:
Subject:    Issue:soap:body binding description confusing when use is
       "literal"



I tried to look for an issue that might have captured this but, there does
not seem to be any that capture this specific issue. I am hoping that this
would be a simple case of someone on the list giving the correct (and
intended) interpretation of the text in the spec that I draw attention to
below:

"Section 3.5 soap:body (binding)

The soap:body binding element provides information on how to assemble the
different message parts inside the Body element of the SOAP message.


   If the operation style is rpc each part is a parameter or a return value
   and appears inside a wrapper element within the body (following Section
   7.1 of the SOAP specification). The wrapper element is named identically
   to the operation name and its namespace is the value of the namespace
   attribute. Each message part (parameter) appears under the wrapper,
   represented by an accessor named identically to the corresponding
   parameter of the call. Parts are arranged in the same order as the
   parameters of the call.
   If the operation style is document there are no additional wrappers, and
   the message parts appear directly under the SOAP Body element. "

This I understand. However later in the same section we have the following
text.

"If use is literal, then each part references a concrete schema definition
using either the element or type attribute. In the first case, the element
referenced by the part will appear directly under the Body element (for
document style bindings) or under an accessor element named after the
message part (in rpc style). In the second, the type referenced by the part
becomes the schema type of the enclosing element (Body for document style
or part accessor element for rpc style).

The confusing part (to me) here is the last sentence above. What is this
really saying for "document" style? Is this same as a part with the "schema
type" as given by the "type" attribute of the part will appear directly
under the body or something else? That is, this is same as the "element"
case but for the fact the an element of the "type" must appear in the body
as opposed to the element itself (as in the "element" case)?

I have seen people interpret this to mean something radical. E.g. from the
WSDL yahoo groups list (see: http://groups.yahoo.com/group/wsdl/message/753
):

                >So for a document/literal operation the XSD type
referenced by the message
                > part becomes the schema type of the SOAP Body element.
                > Presumably this mean that a document/literal operation
can only reference a single
                > message part that uses the 'type' attribute to refer to
an XSD type? Can
                > the message only have one such type?

This seems to be wrong interpretation of the text (undelined above). Any
comments?

Thanks, Prasad
Received on Thursday, 9 May 2002 18:04:26 GMT

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