Namedoco
.. Patient
... Slices for extension
.... extension:birthplace
.... extension:date_of_admission
.... extension:recorded_sex_at_birth
.... extension:cause_of_death
.... extension:vital_status
... identifier
.... use
.... type
..... coding
...... system
...... code
.... value
... name
.... Slices for extension
..... extension:dataAbsentReason
...... value[x]
... Slices for deceased[x]
.... deceased[x]:deceasedBoolean
.... deceased[x]:deceasedDateTime

doco Documentation for this format