Re: [wsbpel] Issue - 111 - Proposal For Vote

[Alex Yiu <alex.yiu@oracle.com>]

Hi Chris,

+1 to your reminder of adding Frank Leymann's suggestion as well.

Maybe, I can provide another potentially friendly amendent to address Frank Leyman's concern. Just a simple change from "MAY" to "MUST" can be misunderstood (as those optional element MUST be used).

FROM:
------------------------------------
The contents of an extensibleActivity element MUST be a single element that MAY have BPEL's standard-attributes and standard-elements defined on it.
------------------------------------

TO:
------------------------------------
The contents of an <extensionActivityWrapper> element MUST be a single element that MUST be compatible with the syntax of a BPEL activity, which has optional standard-attributes and standard-elements defined on.
------------------------------------

Chris, I hope that is good enough to you. :-)


BTW, regarding to your XSD suggestion, there may be a few of things that will not work. Because, the complex type extension your mentioned is actually a "NO-OP" extension. That is:
<element name="extensibleActivity" type="bpws:tExtensibleActivity"/>
is effectively equivalent to:
<element name="extensibleActivity" type="bpws:tActivity"/>

That is:  <extensibleActivity> is EXACTLY like <empty> but with just another element name.

That means it does not allow people to add any new sub-elements or attributes under "extensibleActivity". That will give us a lot of restriction in terms of syntax design. Particularly, we may be forced to use global attribute declaration.


Thanks!


Regards,
Alex Yiu




Chris Keller wrote:

Hi Yaron,

I like Frank Leymann's suggestion of changing the MAY to MUST in "MAY have
BPEL's standard...".  Couldn't we enforce that with a schema definition like
the following?

<element name="extensibleActivity" type="bpws:tExtensibleActivity"/>

<complexType name="tExtensibleActivity">
   <complexContent>
       <extension base="bpws:tActivity"/>
   </complexContent>
</complexType>


And then based on the 92.* rules you can either process the contents of the
extensible activity or you can't.
 
- Chris

-----Original Message-----
From: Yaron Y. Goland [mailto:ygoland@bea.com] 
Sent: Wednesday, May 25, 2005 3:27 PM
To: wsbpeltc
Subject: [wsbpel] Issue - 111 - Proposal For Vote

I re-raise my original proposal - 
http://lists.oasis-open.org/archives/wsbpel/200503/msg00188.html

		Yaron


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