Wanting to setvalue in xforms:repeat

>
> I have an instance that looks like:
>
>  <xforms:instance id="program-definition-instance">
>              <programs xmlns="">
>                  <program>
>                      <title/>
>                      <categories xmlns="">
>                          <category>
>                              <title/>
>                              <items>
>                                  <item>
>                                      <label/>
>                                      <value/>
>                                  </item>
>                              </items>
>                              <category-index>0</category-index>
>                              <section-index>0</section-index>
>                          </category>
>                      </categories>
>                  </program>
>              </programs>
>          </xforms:instance>
>
> I have a bunch of programs and categories in this instance. What I want to so
> is iterate through the instance and set the category-index and the
> section-index (to what doesn't matter).  So I tried nested <xforms:repeat>’s
> but have not been able to setvalue within the repeat. I tried doing this inside
> a trigger but I got a message indicating repeats are not allowed inside an
> action (and putting the action inside the repeats didn’t work either).
>
> Am I missing something obvious?
>
> Any help or pointers would be most welcome!
>
> Thanks,
> Mike.
>
>
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>