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Re: SCXML Variable Scope

From: RJ Auburn <rj@voxeo.com>
Date: Wed, 19 Oct 2005 20:47:36 -0400
Message-Id: <D1F91064-F620-4DBC-B24C-91925CAEC5C7@voxeo.com>
Cc: "Skip Cave" <Skip.Cave@intervoice.com>, <www-voice@w3.org>
To: raxit@phonologies.com

Skip/Sheth:

We are actually just sorting out the specific details of the data  
model for SCXML inside the working group. We do expect to be  
publishing an updated draft soon that shows the direction that we are  
looking at.

     RJ

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



On Oct 19, 2005, at 11:45 AM, Sheth Raxit wrote:

>
> Skip Cave,
>
> I think For SCXML variable scope is implicit.
>
>  State S1 may have Substate S11,s12,s13......,s1n
>     same way SUB_STATE s11 may have further Substate   
> s111,s112,s113,.....,s11n
>
>      and so on......
>
>     So its, Recursive in Nature...And Hard to Fix  numbers of Scope  
> level...
>
>
> (Refer SCXML draft 3.2.1, State...)
> {
> state Defines a sequential substate of the parent state. May occur  
> 0 or more times. Incompatible with the parallel property.
> }
>
> And Implicitly assumed Scope Localization Rule
>
> (i.e. Variable named 'A' of state S1 is available to All the  
> Substates(and Substates of Substates ...) if not explicitly override)
>
>
>
> But If you want to Achieve Same thing lile Vxml...
> then you might have
>
>
>
> State Session1,Session2,Session3.....SessionN
>
> Each Session May Have Further Sub-State(s)...
>
> so STATE Session1 may have Sub-State(s)  (which are Applications)  
> App1,App2,App3,.....,AppN(Applications)
>
>
> Each Application might have Further Sub-State(s) (which are Document)
> So STATE App1 might have Doc1,Doc2,Doc3...,DocN
>
> Each Document might have Further Sub-State(s) (Which are Dialog)
> So STATE Doc1 might have Dlg1,Dlg2,Dlg3...,DlgN
>
>
>
> and Say for Example...in Session1  Variable named 'A' is Declared
> then it should be Also in Scope of All the Sub-State(and All sub- 
> state of sub-state...)
>
> i.e. (Ses1 //Variable 'A'
>          (App1
>              (Doc1
>                   (Dlg1,Dlg2,Dlg3)
>              ,Doc2),
>          app2)
>       );Ses1 ends here...
>
>
> Variable 'A' is Visible in App1,App2,Doc1,Doc2,Dlg1,Dlg2,Dlg3...  
> and all the sub-state of them.
>
> Also if Doc1 has Override the Variable 'A' It would not be  effect
> Doc2...but Affect Dlg1,Dlg2,Dlg3 and all the sub-state of them.
>
>
> Same rules applies to Event-Handler also.
>
> (VoiceXml Scoping is only Example...same way CCXML Scoping may be  
> Described by Adding more Constraint to SCXML )
>
> So As such SCXML is More Generalize,Simple and Flexible.
>
>
> Waiting for Further Response....
>
>
> Regards
> Raxit Sheth
> Systems Software Engineer
> E-mail:Raxit@Phonologies.com
> Tel: +91-22-22029732
> Fax: +91-22-22029728
>
> Phonologies (India) Private Limited
> G-46 Dhanraj Mahal, Chh Shivaji Marg, Mumbai 39. INDIA.
> Ph:+91-22-22029732  Fax:+91-22-22029728 mail@phonologies.com
>
>
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Received on Thursday, 20 October 2005 00:47:46 GMT

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