Re: [wsbpel-spec-edit] Re: <until> activity => <repeatUntil> activity?

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

Hi Yaron,

The conflicts are:
(a) tOnAlarm can contain a sub-element of <until> for until-expression
(b) tOnAlarm can also contain an activity, which can be this 
<repeatUntil>/<until> activity.

If we keep the name "until",  the <until> element in the following XML 
fragment will be ambiguous: (is it the activity or the expression?)
------------------------
<onAlarm>
    <until> .... <until>
</onAlarm>
------------------------

You can just get the XSD from our CVS and change the <repeatUntil> back 
to <until> and submit to some XSD processor that detect conflicts
(e.g. http://www.w3.org/2001/03/webdata/xsv) 
(not Xerces-Java)

Then you will see the problem.

And, "repeat until" is a quite common programming language term.

Google yielded the following links:
Pascal:
http://www.taoyue.com/tutorials/pascal/pas3dc.html
Apple Script: 
http://developer.apple.com/documentation/AppleScript/Conceptual/AppleScriptLangGuide/AppleScript.bc.html


Thanks!


Regards,
Alex Yiu




Yaron Y. Goland wrote:

> I don't like the name change and I don't actually see the problem. 
> tOnAlarm is not a normal activity so there should be no conflict. Can 
> you please explain the exact nature of the conflict?
>         Yaron
>
> Alex Yiu wrote:
>
>>
>>
>> Hi Yaron and others,
>>
>> It seems to me there is conflict between <until> from <onAlarm> and the
>> new <until> activity.
>>
>> (Conflict detection ... thanks to W3C XSV and Oracle XDK in Java -
>> Xerces XSD in Java does not do the detection, while Xerces XSD in C does
>> the detection)
>>
>> =========================
>>   <complexType name="tOnAlarm">
>>     <complexContent>
>>       <extension base="bpws:tExtensibleElements">
>>           <sequence>
>>             <choice>
>>               <element name="for" type="bpws:tDuration-expr"/>
>>               <element name="until" type="bpws:tDeadline-expr"/>
>>             </choice>
>>             <element name="repeatEvery" type="bpws:tDuration-expr"
>> minOccurs="0"/>
>>             <group ref="bpws:activity"/>
>>           </sequence>
>>       </extension>
>>     </complexContent>
>>   </complexType>
>> =========================
>>
>> Note: group "activity" can point to a "until" activity.
>>
>> Hence, I would like to suggest to rename the new "until" activity to
>> "repeatUntil".
>>
>> Is that OK with everyone?
>>
>> Thanks!
>>
>>
>>
>> Regards,
>> Alex Yiu
>>
>>
>>
>>
>