Each PERSON OBSERVATION

K	must be made within one and only one CARE SPELL
	must be observed by one and only one CARE PROFESSIONAL
	or must be observed by one and only one PERSON
	must be classified by one and only one OBSERVATION VALUE TYPE
	must be made within one and only one SERVICE
	may be required by one and only one CARE ISSUE
	may be of relevance to one and only one CARE ISSUE
	may be act as one or more CARE ISSUE