f:Observation
subject: minimum cardinality of 'subject' is 1
effective[x]: minimum cardinality of 'effective[x]' is 1
f:Observation/f:category
id: maximum cardinality of 'id' is 1
coding: minimum cardinality of 'coding' is 1
text: maximum cardinality of 'text' is 1
f:Observation/f:category/f:coding
id: maximum cardinality of 'id' is 1
system: minimum cardinality of 'system' is 1
system: maximum cardinality of 'system' is 1
version: maximum cardinality of 'version' is 1
code: minimum cardinality of 'code' is 1
code: maximum cardinality of 'code' is 1
display: maximum cardinality of 'display' is 1
userSelected: maximum cardinality of 'userSelected' is 1