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Re: [CCXML] Reg execution of subsequent elements after an event is encountered for current element in <transition> - [cc] - ISSUE-614

From: RJ Auburn <rj@voxeo.com>
Date: Thu, 23 Jul 2009 11:44:59 -0400
Cc: www-voice@w3.org, W3C Voice Browser Working Group <w3c-voice-wg@w3.org>
Message-Id: <EF0FC954-6285-46B9-B60A-E8BCA62142E8@voxeo.com>
To: Rajesh N <rajeshn@huawei.com>
Rajesh:

We added language to section 9 that covers this exact situation:

> Once selected, an object representing the event being processed is  
> created at transition scope, and the elements inside the  
> <transition> are executed in document order. If an ECMAScript  
> evaluation error occurs during the execution of an element within a  
> <transition>, error.semantic MUST be raised for that element, and  
> successive elements within that <transition> MUST NOT be executed;  
> Note that while an element that references an invalid connection,  
> dialog, or conference identifier also causes the platform to raise  
> error.semantic, these scenarios MUST NOT terminate execution of the  
> <transition> in which that element is contained.
>

Please let us know if you have any additional questions about this  
question.

Best regards,

	RJ

---
RJ Auburn
CTO, Voxeo Corporation
tel:+1-407-418-1800

On Jul 16, 2009, at 10:06 AM, RJ Auburn wrote:

> Rajesh:
>
> This is being tracked as ISSUE-614. We will be reviewing this item  
> on the ccxml conference call today.
>
>
> 	RJ
>
> ---
> RJ Auburn
> CTO, Voxeo Corporation
> Chair, Editor and Chair, CCXML, VBWG, W3C
>
> On Jul 2, 2009, at 9:25 AM, Rajesh N wrote:
>
>> Hi,
>>
>> I have a doubt regarding the continuation of processing of  
>> subsequent elements in a <transition>, after one of the elements  
>> has encountered an error.
>>
>> Example:
>> <transition event=”connection.connected”>
>>    <log expr=”’In transition for connection.connected event’”/>
>>    <dialogstart src=”BAD_ECMA_EXPR” />
>>    <assign name=”state0” expr=”’dialog_Active’”/ 
>> >                                  //assume state0 is the state  
>> variable
>> </transition>
>>
>> In this case, evaluation of “src” attribute for <dialogstart> leads  
>> to an error.semantic event. Once the interpreter posts this event,  
>> should it continue to execute the next element <assign> in the  
>> transition?
>>
>> I felt that the paragraph describing the “continue / do not  
>> continue” part for event handling in the CCXML specification was a  
>> bit ambiguous. (Section 9.1 Overview – event handling). As per my  
>> understanding, the interpreter should not execute the next element  
>> in situations like (a) if the evaluation of an attribute of the  
>> current element fails or (b) if the interpreter fails in any of its  
>> internal processing related to the current element.
>>
>> The above given snippet is an example of (a).  An example of  
>> situation (b) could be say, if <accept> tag is encountered when the  
>> connection state is not ALERTING (ex: in a transition for  
>> connection.connected) – This may lead to interpreter posting  
>> error.connection.wrongstate event
>>
>> I think it may be more clearly described in the specification as  
>> to, under which all conditions shall the interpreter continue to  
>> execute subsequent elements. Is it that the interpreter can  
>> continue to execute next element if it is able to process all  
>> attributes of the current element without error and perform the  
>> necessary actions to request the platform to realize the required  
>> operation?
>>
>> Thanks
>> Rajesh
>
>
>
>
Received on Thursday, 23 July 2009 15:45:43 GMT

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