writing to xpath string result

Hi,

One thing I've found that would be really helpful for xforms is, given data like:

<foo>
   <bar name="blah">text</bar>
</foo>

and xforms input controls bound to:

/foo/bar
and
/foo/bar@name

to be able to evaluate that xpath expression and write new data to the resulting 
text node or attribute, without having to figure out which one it is (since 
xpath can do that anyway).  Basically, to be able to set the stringValue 
attribute on the result.  The semantics of this, at least for my purposes, would 
be pretty straightforward... it would only need to work for a single-node 
result, and if the expression points to the text node child of an element, it 
can blow away any existing children of the element and replace them with a new 
text node.

Any thoughts on this?

-Brian Ryner
[email protected]