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Re: Question on SCXML algorithm

From: Kazuyuki Ashimura <ashimura@w3.org>
Date: Tue, 18 May 2010 15:39:59 +0900
Message-ID: <4BF2363F.4060101@w3.org>
To: Jim Barnett <Jim.Barnett@alcatel-lucent.com>
CC: ENGELMANN Bruce <Bruce.ENGELMANN@3ds.com>, www-voice@w3.org
Yes, the seventh draft of SCXML was published on May 13th, though
there was some trouble with the W3C server and we couldn't send out
an announcement for that until today.

Sorry for the inconvenience.  I'll send out an announcement shortly.

Kazuyuki


Jim Barnett wrote:
> Bruce,
> 
> It looks like you have come across a bug in the algorithm that has been 
> fixed in the latest working draft, which was published just last week.  
>   Let us know if this version fixes your problem:  
> http://www.w3.org/TR/scxml/
> 
>  
> 
> Please let us know about you experience with the spec.  We have tried to 
> keep SCXML from being voice-specific, and are very interested in 
> non-voice applications.
> 
>  
> 
> -          Jim
> 
>  
> 
> *From:* www-voice-request@w3.org [mailto:www-voice-request@w3.org] *On 
> Behalf Of *ENGELMANN Bruce
> *Sent:* Monday, May 17, 2010 5:58 PM
> *To:* www-voice@w3.org
> *Subject:* Question on SCXML algorithm
> 
>  
> 
> Hello,
> 
>  
> 
> I am the CTO of DS SIMULIA Corporation. I am looking at adopting SCXML 
> for a controller for multiphysics simulation – a far cry from the voice 
> applications which reference SCXML. I am very excited about the emerging 
> standard as Haral state charts are quite useful for some of our 
> applications.
> 
>  
> 
> I have a question on the “Algorithm for SCXML Interpretation from the 
> Working Draft 29 document. In procedure addStatesToEntry, when 
> evaluating the block isCompoundState(s), there is a call to 
> getDefaultInitialState(s). I cannot find this function defined in the 
> document. Presumably it returns a single value of a state id. However, 
> in my understanding of SCXML that the target of the sole transition of 
> an <initial> element can be any decendant (not necessarily direct) of 
> the composite state. If the composite state has parallel grandchildren 
> then can’t there be multiple targets within that parallel region? If so, 
> then how do I interpret getDefaultInitialState(s) in the algorithm.
> 
>  
> 
> It may be my lack of understanding of SCXML but I sure would appreciate 
> some help here. I am very excited from what I see so far and this seems 
> very applicable to our domain. I would be glad to update you on our 
> progress in the future.
> 
>  
> 
> Thanks for your help in advance.
> 
>  
> 
> Bruce
> 
>  
> 
>  
> 
> /Cordialement / Best regards,/
> 
> ------------------------------------------------------------------------
> 	
> 
> *Bruce ENGELMANN
> **/SIMULIA Product Dev & Research
> /*/Office: +1 401276 4460
> Bruce.ENGELMANN@3ds.com <mailto:Bruce.ENGELMANN@3ds.com>
> /*Dassault Systèmes I www.3ds.com <http://www.3ds.com>*
> 
> Visit us at: *www.simulia.com <http://www.simulia.com>*
> /SIMULIA - Dassault Systemes Simulia Corp. 166 Valley Street - 
> 02909-2499 PROVIDENCE - United States/
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-- 
Kazuyuki Ashimura / W3C Multimodal & Voice Activity Lead
mailto: ashimura@w3.org
voice: +81.466.49.1170 / fax: +81.466.49.1171
Received on Tuesday, 18 May 2010 06:41:18 GMT

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