Constraint Descriptor : hl7ips3154 (type: ERROR, kind: Cardinality)

Constraint : hl7ips3154

Constraint Name
hl7ips3154 (type: ERROR, kind: Cardinality)
Constraint Class
IPSProblemEntry
Package
hl7ips
Description
In IPS Problem Entry, /hl7:observation[hl7:templateId/@root='2.16.840.1.113883.10.22.4.8']/hl7:entryRelationship[hl7:observation/hl7:templateId/@root='2.16.840.1.113883.10.22.4.20']/hl7:observation/hl7:templateId[@root='2.16.840.1.113883.10.22.4.20'] SHALL contain at most ONE hl7:templateId[@root='2.16.840.1.113883.10.22.4.20']
OCL 
self.entryRelationship.observation.templateId->select((not root.oclIsUndefined()) and root='2.16.840.1.113883.10.22.4.20')->size()<2