Optional
_expressionOptional
_humanHuman description of constraint
Optional
_keyTarget of 'condition' reference above
Optional
_requirementsWhy this constraint is necessary or appropriate
Optional
_severityerror | warning
Optional
_sourceReference to original source of constraint
Optional
_xpathXPath expression of constraint
Optional
expressionFHIRPath expression of constraint
Optional
extensionAdditional content defined by implementations
Human description of constraint
Optional
idUnique id for inter-element referencing
Target of 'condition' reference above
Optional
requirementsWhy this constraint is necessary or appropriate
error | warning
Optional
sourceReference to original source of constraint
Optional
xpathXPath expression of constraint
FHIRPath expression of constraint