Description of Partnames in Header/Footer
To have the partname in header or footer is a significant thing for identification
of all pages - f o l l o w i n g page 1 - (which indicates it already).
Otherwise it is hard to separate a batch of printouts with different parts.
As best solution I think of a meta-tag (e.g. $:partName:)
created automatically for the list of avaiable meta-tags
during parts were defined - carrying the recent partname.