> In Peter's hierarchy :
>
> <interpGrp id="ip04" type="petrarchan elements">
>>>   <interpGrp id="ip041" type="External motives">
>>>     <interpGrp id="ip0411" type="Praise of the lady">
>>>       <interp id="ip04111" value="Physical and spiritual
>>> perfection, described in  hyperbolical/>
>>>       ...
>>>     </interpGrp>
>>>     ...
>>>   </interpGrp>
>>>   ...
>>> </interpGrp>
>
> what if I want to use "External motives" as a target for a @ana attribue ?
> I guess I have to insert a
> <interp value="External motives"> inside the <interpGrp type="External
> motives">
>
> Am I right ?

This wouldn't work, because then at the lowest group level (here: Praise
of the lady') you'd have to insert an interp element that would be at the
same level as the interp's that are members of that group. So what we did
was point at the interpGrp: ana="#ip041".

I'm not quite comfortable with this, as what was stored in the value
attribute on interp we stored in the type attribute of the interpGrp. What
you would want to have (in P4 terms) is another value attribute on
interpGrp, or (in P5 terms) a desc subelement.