, XML archives implement special handling for
name-value pairs by overriding this function template for name-value pairs.  
This replaces the default name-value pair handling, which is just to throw away the name,
with one appropriate for XML which writes out the start of an XML tag with the correct object name.
<p>
The second argument must be part of the function signature even though it is not used.
Its purpose is to be sure that code is portable to compilers which fail to correctly
implement partial func