Re: [wsbpel] Issue 103 - Good Idea!

[Maciej Szefler <mbs@fivesight.com>]

So what is the logic of keeping the different forms of the from-spec if 
the single expression from-spec does the job?

-maciej
On Fri, 12 Mar 2004 13:41:46 -0800, Alex Yiu <alex.yiu@oracle.com> wrote:

>
> Hi all,
>
> [After a morning of meeting, back online ... :-) ]
>
> Yes, I agree with Ron.
> We may not want to overload expression, like $var/a/b/c, as the 
> assignment target.
> I tend to believe that we still want to:
> (1) keep both expression and query in from-spec
> (2) keep query in to-spec
> (3) allow the usage of $var in expression
>
> Danny ... if we pass issue 11 (assume we go for insertBefore and 
> appendChild), the to-spec for  insertBefore and appendChild will be the 
> same. The only change is: expression in from-spec now can use $var
>
> E.g.:
> <appendChild>
>    <from expression="$fooVar/abc/def" />
>    <to variable="barVar" query="/ghi/jkl" />
> </appendChild>
>
> the expression would be appended as as the last child under "/ghi/jkl". 
> And, "/ghi/jkl" are existing nodes.
>
> IMHO, XPath location path used in query or expression will always point 
> to existing nodes, even after / if Issue 11 is passed.
>
>
>
> Thanks!
>
>
>
> Regards,
> Alex yiu
>
>
>
>
> Ron Ten-Hove wrote:
>
>> Danny van der Rijn wrote:
>>
>>> maybe i just don't know XPATH well enough, but if $var/a/b/c doesn't 
>>> exist,
>>> can it be the target of an assign?
>>>
>>>
>> XPath 1.0 expressions turn into node-sets, booleans, numbers, or 
>> strings (and do so without side effects). They don't turn into 
>> positional references. $var/a/b/c doesn't make sense as the target of 
>> an <assign> activity, from the XPath point of view.
>>
>> -Ron
>>
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>
>
>
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-- 
Maciej Szefler [mbs(a)fivesight.com] [+1-312-432-0556x226]