The @perf attribute on the <tech> elements is data.enumerated, but its valDesc clearly says "The IDREFS are derived from the xml:id attribute on a performance element," so it should be one-to-infinity data.pointers. The parallel @perf on <move> already is data.pointers.
There might also be a case for creating an attribute class att.performance.
Sounds entirely plausible to me. Go green.
Agreed. Assigning to Martin to change to data.pointer. This change is backwards compatible enough in existing processing models.
Completed in rev 12589. Closing the ticket.