Save an attribute of a drop-down list item

[fenxp free fr]

When you save a Diagram with format .Dia uncompressed,
the value of a item of an drop-down list is saved as an integer.
This is an example:

<dia:attribute name="type">
   <dia:enum val="0"/>
</dia:attribute>

Is that possible to save the value of the attribute instead of the value of the
index ?

I would like to have a thing of this kind:

<dia:attribute name="type">
   <dia:string>#Normal step#</dia:string>
</dia:attribute>


 -- Alex