Voicexml how to store input into a global variable

I'm creating a voicexml appliacation.

I want to store an user input into a global variable.

I wondered, the input should be stored in the fieldvar. shouldn't it? After I tried it with this, i tried to store it in an global variable:

<assign name="myvar" expr="'myinput'"/>

but somehow it didn't work. I used value expr="var" as expr.

<?xml version="1.0" encoding="UTF-8"?> 
<vxml xmlns="http://www.w3.org/2001/vxml" 
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
  xsi:schemaLocation="http://www.w3.org/2001/vxml 
   http://www.w3.org/TR/voicexml20/vxml.xsd"
   version="2.0">


<var name="myProdukt" />


<form id="test">

<field name="var">
<prompt bargein="true" bargeintype="hotword" >Sagen Sie ein Produkt</prompt>

<grammar root="main" version="1.0" xml:lang="de-DE">

  <rule id="main" scope="public">
    <one-of>
      <item> p1 </item>
      <item> p2 </item>
      <item> p3 </item>
      <item> p4   </item>
    </one-of>
  </rule>

</grammar>



<filled>
<assign name="myProdukt" expr="<value expr="var"/>"/>
</filled>

</field>


</form>

<<!--[...] Here i want to use the input.-->

</vxml>

thanks in advance

---------------EDIT:

now i used this:

<filled>
test
<assign name="myProdukt" expr="var" />
</filled>

I only changed that. The Applications says "test" but then there is an error.

It isn'T allowed to use "var" instead I used an other name :-)

Solution

Did you try a simple assignment of field var to the variable myProdukt like so ?

<filled>
    <assign name="myProdukt" expr="var"/>
</filled>

Which would be fine except that according to Section 5.1, Variables and Expressions of the Voice XML specification:

VoiceXML variables, including form item variables, must not contain ECMAScript reserved words.

So, you'll need to rename the field var to something that is not a reserved word in ECMAscript, say productSelection:

<field name="productSelection"> 
    <!-- .. prompt, grammar as before .. -->
    <filled>
        <assign name="myProdukt" expr="productSelection"/>
    </filled>
</field>