I have nodes with attributes named like "flgHomeTown", "flgCity", that
will have either a value of 1 or 0.  I need to match a list of nodes
where the corresponding flg attribute is = 1.  So:

<root>
 <Fields>
   <Field flg="flgHomeTown">
   <Field flg="flgCity">
 </Fields>
 <data>
   <row flgHomeTown="0" flgCity="1"/>
 </rdata>
</root>

<result>
<Field flg="flgCity"/>
</result>

Where I am having troubles is for the data/row attributes, matching
this named attribute to the attribute value from Feilds/Field flg.
I've tried: