Passolo 2016 XML Parser - can I have a composite ID made up from the value of an attribute, plus some literal text?

If my XML source is this:

<element id="fred" label="translate this label" description="translate this description"/>

I can add these 2 data elements to the parser no problem:
element/attribute::label
element/attribute::description

But I'd like the first entry to have an ID of "fred_label" and the second entry to have an ID of "fred_description".

I'm not sure if this is possible but it would help if it was.
Regards
Mark