NameRequiredExtensibleCandidatePreferredExampledoco
.. Condition
... implicitRules
... Slices for extension
.... extension:age_at_diagnosis
.... extension:age_at_onset
... modifierExtension
... clinicalStatus Condition Clinical Status Codes
... verificationStatus ConditionVerificationStatus
... category Problem Type - IPS Problem Type (LOINC)
... severity Condition/DiagnosisSeverity
.... coding
..... system
..... code Severity Value Set
..... display
...... Slices for extension
....... extension:translation
.... text
... code Problems - IPS
... bodySite SNOMEDCTBodyStructures
.... coding
..... system
..... code
..... display
...... Slices for extension
....... extension:translation
.... text
... subject
.... reference
.... identifier
... Slices for onset[x]
.... onset[x]:onsetDateTime

doco Documentation for this format