this measure incorporates a library for participation.  The library is NCQA_Common v4.7

First - I'm working with Bryn Rhodes on this logic and testing.  The problem does not occur on Bryn's test system.

The issue is that more than one payer type should be able to satisfy the logic we've specified for participation periods, as long as the time period specified is met.

Bryn wrote this function for participation in period

arguments list: 

collapse ( Participation P
let I: P.participationPeriod
intersect ParticipationPeriod
where P.participationPeriod overlaps ParticipationPeriod
return all Interval[ToDate(start of I), predecessor of ( ToDate(
end of I
)+ 1 day
)]
)