problem w/ trying to use xxforms variable in help w/ for attr

> I get the following error when I use a variable in an xforms:help element
> that has a for attribute:
> Undeclared variable in a standalone expression: $atrName
> <xforms:repeat
> nodeset="xxforms:sort(instance('data')/query/PCIAudit/@*[not(name() =
> 'nodeID') and not(name() = 'parents') and not(name() = 'contentdata') and
> not(matches(name(),'parent-.*ID')) and not(name() = 'ID')],name())">
>                 <xxforms:variable name="atrName" select="name()" />
>                 <xhtml:tr class="{if (position() mod 2 = 0) then 'even' else
> 'odd'}">
>
>                   <xhtml:td style="text-align: right;" width="30%">
>                     <xforms:input ref="." id="bob">
>                       <xforms:hint ref="instance('types')//type[@typeID =
> concat('PCIAudit.',$atrName)]/hint" />
>                       <xforms:alert ref="instance('types')//type[@typeID =
> concat('PCIAudit.',$atrName)]/alert" />
>                     </xforms:input>
>                   </xhtml:td>
>                   <xhtml:td>
> this line works fine
>                     <xforms:output value="instance('types')//type[@typeID =
> concat('PCIAudit.',$atrName)]/help" />
> this line throws the error
>                     <xforms:help for="bob">
>                       <xforms:output value="instance('types')//type[@typeID
> = concat('PCIAudit.',$atrName)]/help" />
>                     </xforms:help>
>                   </xhtml:td>
>                 </xhtml:tr>
>               </xforms:repeat>
> doing it this way will also throw the error
> <xforms:help for="bob" ref="instance('types')//type[@typeID =
> concat('{@nodeSet}.',$atrName)]/help"/>
>
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