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From "Ingmar Kliche" <ingmar.kli...@googlemail.com>
Subject Re: [SCXML] Difficulties with XPath expression on XML attributes
Date Sun, 15 Jul 2007 11:48:30 GMT
Thanks!

- Ingmar.


2007/7/13, Rahul Akolkar <rahul.akolkar@gmail.com>:
>
> On 7/13/07, Ingmar Kliche <ingmar.kliche@googlemail.com> wrote:
> > I have difficuties to select a node using XPath. I use an EMMA XML
> > repesented input:
> >
> > <emma:emma version="1.0"
> >     xmlns:emma="http://www.w3.org/2003/04/emma"
> >     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> >     xsi:schemaLocation="http://www.w3.org/2003/04/emma
> >      http://www.w3.org/TR/2007/WD-emma-20070409/emma.xsd"
> >     xmlns="http://www.example.com/example">
> >   <emma:one-of id="r1" emma:start="1087995961542"
> emma:end="1087995963542">
> >     <emma:interpretation id="int1" emma:confidence="0.75"
> >     emma:tokens="flights from boston to denver">
> >       <origin>Boston</origin>
> >       <destination>Denver</destination>
> >     </emma:interpretation>
> >
> >     <emma:interpretation id="int2" emma:confidence="0.68"
> >     emma:tokens="flights from austin to denver">
> >       <origin>Austin</origin>
> >       <destination>Denver</destination>
> >     </emma:interpretation>
> >   </emma:one-of>
> > </emma:emma>
> >
> > taken from [1]. This EMMA document is parsed into its DOM and passed
> into
> > the engine (attached to the eventdata). Now I'd like to select the
> <origin>
> > out of the first interpretation. I tried to use the following statement:
> >
> > <transition event="emma" xmlns:emma=http://www.w3.org/2003/04/emma
> >
> cond="Data(_eventdata.emma,'/emma:emma/emma:one-of/emma:interpretation[@id='int1']/origin')
> > eq 'Boston'" target="twenty" />
> >
> > I think the XPath itself is correct, but unfortunately the overall
> statement
> > is not a valid JEXL statement anymore (as of the ' around "int1"). How
> > should I select the value of the attribute to make it a valid statement?
> I
> > tried to escape using \ , but it did not work.
> >
> > Any suggestion?
> >
> <snip/>
>
> This nets out to be a JEXL question. It has been asked before a few
> [1],[2],[3],[4] times.
>
> JEXL has no elegant way of doing this (you can store an apostrophe in
> the state machine's root context and then use it in string
> concatenation to get by).
>
> -Rahul
>
> [1]
> http://www.nabble.com/-scxml--Data%28%29-xpath-and-the-syntax-tf1682372.html
> [2]
> http://www.nabble.com/-jexl--How-to-escape-the-Apostrophe-tf1686607.html
> [3] http://www.nabble.com/-Jelly-JEXL--String-concatenation-tf155102.html
> [4]
> http://www.nabble.com/-Jexl--String-Literals-with-Newline-do-not-work-tf4035993.html
>
>
>
> > - Ingmar.
> >
> > [1] http://www.w3.org/TR/emma
> >
>
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