Hi Team,

Consider statements below from CMS111v10:

One of the Initial Population criteria states:

ED Encounter with Decision to Admit
/Constrains the inpatient encounter to having an ED visit with a decision to admit (assessment or order) to inpatient and ED facility location period is not null/
Global."Inpatient Encounter" EncounterInpatient
let LastEDVisit: LastEDEncounter(EncounterInpatient),
AdmitAssessment: "AdmitDecisionUsingAssessment"(EncounterInpatient)
where ( Global."NormalizeInterval" ( AdmitAssessment.relevantDatetime, AdmitAssessment.relevantPeriod ) starts during LastEDVisit.relevantPeriod
or ( "AdmitDecisionUsingEncounterOrder"(EncounterInpatient).authorDatetime during LastEDVisit.relevantPeriod )
)
and exists ( LastEDVisit.facilityLocations Location
where Location.code in "Emergency Department Visit"
and Global."HasEnd" ( Location.locationPeriod )

Functions:
Global.HasEnd(period Interval<DateTime>)
not (
end of period is null
or
end of period = maximum DateTime
)

Questions:

Question #1:
What do we mean by ‘Global."HasEnd" ( Location.locationPeriod )’? Do we need to check enddate of locationPeriod where Location.code in "Emergency Department Visit"?

Question #2:
not (
end of period is null
or
end of period = maximum DateTime
)
As per this expression, what does “end of period = maximum DateTime” indicate?

Request you to assist on above queries urgently as client deliverables are dependent upon it.