wsbpel message
[Date Prev]
| [Thread Prev]
| [Thread Next]
| [Date Next]
--
[Date Index]
| [Thread Index]
| [List Home]
Subject: Issue - 110 - Issues with the Pattern Attribute
- From: ws-bpel issues list editor<peter.furniss@choreology.com>
- To: wsbpel@lists.oasis-open.org
- Date: Wed, 24 Mar 2004 20:07:34 +0000
This issue has been added to the wsbpel issue list.
The issues list is posted as a Technical Committee document to the
OASIS WSBPEL TC pages
on a regular basis. The current edition, as a TC document, is the most recent document
with the title in the
"Issues" folder of the WSBPEL TC document list
- the next posting will include this issue.
The list editor's working copy, which will normally include an issue when it is announced, is available at
this constant URL.
Issue - 110 - Issues with the Pattern Attribute
Status: open
Area: Syntax and validation
Date added: 24 Mar 2004
Submitter: Yaron Y. Goland
Date submitted: 24 March 2004
Description: Section 10.2 of the specification currently says:
Finally, in the case of invoke, when the operation invoked is
synchronous request/response, a pattern attribute is used to indicate
whether the correlation applies to the outbound (request) message, the
inbound (response) message, or both. These ideas are explained in more
detail in the context of the use of correlation in the rest of this
example.
There are several issues this text raises about the pattern attribute:
- The pattern attribute is intended to deal with request/response
patterns but such patterns are not required to be synchronous. It is
legal in WSDL 1.1 to define a request/response operation that bind to an
asynchronous binding. I realize that the intent was probably to say that
the behavior within BPEL (as opposed to on the wire) is synchronous but
in that case the distinction needs to be made clear.
- I consistently get confused about what in versus out means. Why not
use names that more closely match the WSDL names? E.g. something like
"request | response | both"? I would extend this change to the
inputvariable and outputvariable attributes renaming them
responseVariable and requestVariable.
- The text in the referenced paragraph has caused confusion because
it implies that the pattern attribute is only needed on correlation sets
on request/response invokes. But we also require its use on one-ways.
Ideally we would make the pattern attribute illegal on correlation sets
defined on one-way Invokes and mandatory on correlation sets used on
request/response Invokes. I realize that we probably can't express that
restriction in XML Schema but, if so, we shouldn't allow XML Schema's
limitations stop us from doing the right thing for our users.
Changes: 24 Mar 2004 - new issue
To comment on this issue, please follow-up to this announcement on the
wsbpel@lists.oasis-open.org list (replying to this message should automatically send your message to that list), or ensure
the subject line as you send it starts "Issue - 110 - [anything]" or is a reply
to such a message.
To add a new issue,
see the issues procedures document (but the address for new issue submission is the sender of this announcement).
[Date Prev]
| [Thread Prev]
| [Thread Next]
| [Date Next]
--
[Date Index]
| [Thread Index]
| [List Home]