Re: Namelist continued

Given the unfinished state of the XPath data model, I think you are right. If we ever decide to finish it, we might add language to the effect that '$var' should be considered to match 'var' in the XPath data model.  

As it is, namelist is not useful with XPath. If you can find a way to make it useful in your implementation, feel free to go ahead even if you deviate from the language in the spec. As it stands, the XPath data model is not a standard. 

Jim Barnett
Genesys

> On May 5, 2016, at 12:32 PM, Jon Kerny <jon.kerny@gmail.com> wrote:
> 
> Hi,
> 
> I'm making the final fixes to my scxml interpreter. to make it compliant with the testcase suite. Currently there is only four testcases that fail for xpath, 241, 244, 240 and 354. (240, and 354 uses the strange data/data/data syntax)
> 
> 241 uses $var1 in namelist and of invoke and tries to match to var1 in invoked machine. So from your comments earlier I think that 241 and 244 shall fail for Xpath?
> 
> Thanks again for you great job, and your patient replies.
> 
> /Jon
> 
>> On Sat, Sep 26, 2015 at 6:16 PM, Jon Kerny <jon.kerny@gmail.com> wrote:
>> Hi, 
>> 
>> thanks for the clarification. I think that part of my confusion came from that it wasn't useful in the xpath model and thus it didn't make sense to me, and I felt that there was something I didn't understand.
>> 
>> Thanks.
>> 
>> /Jon
>> 
>>> On Sat, Sep 26, 2015 at 5:58 PM, Jim Barnett <1jhbarnett@gmail.com> wrote:
>>> One further thought on the XPath data model and namelist.   The XPath data model  _could_ be modified to say "for the purposes of passing a namelist into invoke, the namelist attribute '$foo' shall be considered to match <data id="foo"/>.    We didn't do that, because we didn't expect 'namelist' to be useful everywhere. However, the XPath data mode is not part of the final specification, and is thus not a 'standard' at all, so people working with it have some flexibility.
>>> 
>>> - Jim
>>> 
>>>> On 9/26/2015 9:12 AM, Jon Kerny wrote:
>>> 
>>>> HI,
>>>> 
>>>> I saw that there previously has been some discussions about the namelist, and that at least in some parts my questions has been adressed. But I feel that this is quite complicated.
>>>> 
>>>> In my understanding, namelist is a shorthand for param, but this name thing makes it more complicated than param where name is set explicitly in code.
>>>> 
>>>> 
>>>> Here are some examples I'd like to get comments on:
>>>> 
>>>> What would be the names in an Xpath scxml if the following location expressions was used in a namelist?
>>>> 
>>>> $var1
>>>> $var1/children
>>>> $var1/children[last()]
>>>> ancestor::$var1/children[last()]"
>>>> 
>>>> If the target of the invoke/send is an ecmascript scxml with the var1 as a top most id what would the result be?
>>>> 
>>>> If it instead is a xpath scxml what would be the result?
>>>> 
>>>> And in the opposite direction, what would the names of an ecmascript datamodel be for the following location expressions in namelist?
>>>> var1
>>>> var1.children
>>>> var1.children.slice(-1)[0]
>>>> (I don't know how to write something similar to ancestor)
>>>> 
>>>> And what would happen if the target of the invoke/send is an ecmascript scxml with the var1 as a top most id what would the result be?
>>>> 
>>>> If it instead is a xpath scxml what would be the result?
>>>> 
>>>> Best regards,
>>>> 
>>>> Jon
>