Constraint Descriptor : hl7ips2129 (type: ERROR, kind: Cardinality)

Constraint : hl7ips2129

Constraint Name
hl7ips2129 (type: ERROR, kind: Cardinality)
Constraint Class
IPSEntryAllergyOrIntolerance
Package
hl7ips
Description
In IPS Allergy or Intolerance, /hl7:observation[hl7:templateId/@root='2.16.840.1.113883.10.22.4.1']/hl7:entryRelationship[hl7:observation/hl7:templateId/@root='2.16.840.1.113883.10.22.4.21']/hl7:observation/hl7:templateId[@root='2.16.840.1.113883.10.22.4.21'] SHALL contain at most ONE hl7:templateId[@root='2.16.840.1.113883.10.22.4.21']
OCL 
self.entryRelationship.observation.templateId->select((not root.oclIsUndefined()) and root='2.16.840.1.113883.10.22.4.21')->size()<2