1-example-valueset-with-extension.json

{
  "resourceType": "ValueSet",
  "id": "VSPHQ9",
  "meta": {
    "profile": [
      "http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-valueset"
    ]
  },
  "url": "http://hl7.org/fhir/uv/sdc/ValueSet/VSPHQ9",
  "name": "VSPHQ9",
  "status": "draft",
  "description": "The answer list for questions addressing the frequency in which patient reports experiencing behaviors that are assessed in the PHQ-9 Questionnaire.",
  "immutable": true,
  "compose": {
    "include": [
      {
        "system": "http://hl7.org/fhir/uv/sdc/CodeSystem/CSPHQ9",
        "concept": [
          {
            "extension": [
              {
                "url": "http://hl7.org/fhir/StructureDefinition/ordinalValue",
                "valueDecimal": 0
              }
            ],
            "code": "Not-at-all",
            "display": "Not at all"
          },
          {
            "extension": [
              {
                "url": "http://hl7.org/fhir/StructureDefinition/ordinalValue",
                "valueDecimal": 1
              }
            ],
            "code": "Several-days",
            "display": "Several days"
          },
          {
            "extension": [
              {
                "url": "http://hl7.org/fhir/StructureDefinition/ordinalValue",
                "valueDecimal": 2
              }
            ],
            "code": "More than half the days",
            "display": "More than half the days"
          },
          {
            "extension": [
              {
                "url": "http://hl7.org/fhir/StructureDefinition/ordinalValue",
                "valueDecimal": 3
              }
            ],
            "code": "Nearly every day",
            "display": "Nearly every day"
          }
        ]
      }
    ]
  }
}

2-current-expansion.json

{
  "resourceType": "ValueSet",
  "url": "http://hl7.org/fhir/uv/sdc/ValueSet/VSPHQ9",
  "status": "active",
  "compose": {
    "include": [ {
      "system": "http://hl7.org/fhir/uv/sdc/CodeSystem/CSPHQ9",
      "concept": [ {
        "extension": [ {
          "url": "http://hl7.org/fhir/StructureDefinition/ordinalValue",
          "valueDecimal": 0
        } ],
        "code": "Not-at-all",
        "display": "Not at all"
      }, {
        "extension": [ {
          "url": "http://hl7.org/fhir/StructureDefinition/ordinalValue",
          "valueDecimal": 1
        } ],
        "code": "Several-days",
        "display": "Several days"
      }, {
        "extension": [ {
          "url": "http://hl7.org/fhir/StructureDefinition/ordinalValue",
          "valueDecimal": 2
        } ],
        "code": "More than half the days",
        "display": "More than half the days"
      }, {
        "extension": [ {
          "url": "http://hl7.org/fhir/StructureDefinition/ordinalValue",
          "valueDecimal": 3
        } ],
        "code": "Nearly every day",
        "display": "Nearly every day"
      } ]
    } ]
  },
  "expansion": {
    "identifier": "9f671ee2-62db-4966-83e8-646e52b2fbf7",
    "timestamp": "2023-03-10T22:21:49+00:00",
    "total": 4,
    "offset": 0,
    "contains": [ {
      "system": "http://hl7.org/fhir/uv/sdc/CodeSystem/CSPHQ9",
      "code": "Not-at-all",
      "display": "Not at all"
    }, {
      "system": "http://hl7.org/fhir/uv/sdc/CodeSystem/CSPHQ9",
      "code": "Several-days",
      "display": "Several days"
    }, {
      "system": "http://hl7.org/fhir/uv/sdc/CodeSystem/CSPHQ9",
      "code": "More than half the days",
      "display": "More than half the days"
    }, {
      "system": "http://hl7.org/fhir/uv/sdc/CodeSystem/CSPHQ9",
      "code": "Nearly every day",
      "display": "Nearly every day"
    } ]
  }
}

3-desired-expansion.json

{
  "resourceType": "ValueSet",
  "url": "http://hl7.org/fhir/uv/sdc/ValueSet/VSPHQ9",
  "status": "active",
  "compose": {
    "include": [ {
      "system": "http://hl7.org/fhir/uv/sdc/CodeSystem/CSPHQ9",
      "concept": [ {
        "extension": [ {
          "url": "http://hl7.org/fhir/StructureDefinition/ordinalValue",
          "valueDecimal": 0
        } ],
        "code": "Not-at-all",
        "display": "Not at all"
      }, {
        "extension": [ {
          "url": "http://hl7.org/fhir/StructureDefinition/ordinalValue",
          "valueDecimal": 1
        } ],
        "code": "Several-days",
        "display": "Several days"
      }, {
        "extension": [ {
          "url": "http://hl7.org/fhir/StructureDefinition/ordinalValue",
          "valueDecimal": 2
        } ],
        "code": "More than half the days",
        "display": "More than half the days"
      }, {
        "extension": [ {
          "url": "http://hl7.org/fhir/StructureDefinition/ordinalValue",
          "valueDecimal": 3
        } ],
        "code": "Nearly every day",
        "display": "Nearly every day"
      } ]
    } ]
  },
  "expansion": {
    "identifier": "9f671ee2-62db-4966-83e8-646e52b2fbf7",
    "timestamp": "2023-03-10T22:21:49+00:00",
    "total": 4,
    "offset": 0,
    "contains": [ {
        "extension": [ {
          "url": "http://hl7.org/fhir/StructureDefinition/ordinalValue",
          "valueDecimal": 0
        } ],
        "system": "http://hl7.org/fhir/uv/sdc/CodeSystem/CSPHQ9",
        "code": "Not-at-all",
        "display": "Not at all"
      }, {
        "extension": [ {
          "url": "http://hl7.org/fhir/StructureDefinition/ordinalValue",
          "valueDecimal": 1
        } ],
        "system": "http://hl7.org/fhir/uv/sdc/CodeSystem/CSPHQ9",
        "code": "Several-days",
        "display": "Several days"
      }, {
        "extension": [ {
          "url": "http://hl7.org/fhir/StructureDefinition/ordinalValue",
          "valueDecimal": 2
        } ],
        "system": "http://hl7.org/fhir/uv/sdc/CodeSystem/CSPHQ9",
        "code": "More than half the days",
        "display": "More than half the days"
      }, {
        "extension": [ {
          "url": "http://hl7.org/fhir/StructureDefinition/ordinalValue",
          "valueDecimal": 3
        } ],
        "system": "http://hl7.org/fhir/uv/sdc/CodeSystem/CSPHQ9",
        "code": "Nearly every day",
        "display": "Nearly every day"
      } ]
  }
}

Note: in the desired expansion the ordinalValue extension exists in the expansion.