DV_ORDINAL

There is no transformation into FHIR directly, DV_ORDINAL describes:

A data type that represents integral score values, e.g. pain, Apgar values, etc, where there is:

a) implied ordering, b) no implication that the distance between each value is constant, and c) the total number of values is finite; d) integer values only.

CodeableConcept

CodeableConcept to DV_ORDINAL

An option is to use Coding here. However, the mapping requires context information, such as the value of the coding, which is not provided by the Coding itself. Therefore, the mapping relies on the model representing the same, with the value coded as part of the ordinal.

FHIRpath Cardinality Comment openEHR Cardinality Comment

coding.code

0..n

symbol

1..1

requires manual mapping!

-

value

1..1

has to be maintained by the archetype itself

This will require a manual mapping, since DV_ORDINALS are modeled as local term_sets.

Example

{
     "coding": [
       {
         "system": "https://somecoding.com",
         "code": "resp4",
         "display": "Respiratory system SOFA score 4"
       }
     ],
     "text": "PaO₂/FiO₂ 300-399 mmHg"
   }
 "_type" : "DV_ORDINAL",
              "symbol" : {
                "_type" : "DV_CODED_TEXT",
                "value" : "PaO₂/FiO₂ 300-399 mmHg",
                "defining_code" : {
                  "_type" : "CODE_PHRASE",
                  "terminology_id" : {
                    "_type" : "TERMINOLOGY_ID",
                    "value" : "local"
                  },
                  "code_string" : "at0002"
                }
              },
              "value" : 4 # part of the archetype