{

"resourceType": "StructureDefinition",
"id": "valueset-expand-group",
"extension": [
  {
    "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
    "valueCode": "vocab"
  },
  {
    "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
    "valueInteger": 1
  }
],
"url": "http://hl7.org/fhir/StructureDefinition/valueset-expand-group",
"version": "4.0.1",
"name": "expand-group",
"status": "draft",
"date": "2019-11-01T09:29:23+11:00",
"publisher": "HL7",
"description": "This extension declares a group of concepts that is generated into the ValueSet.expansion.contains hierarchy when the expansion is generated for a UI. THere is no inherent assigned meaning to the hierarchy; it is used to help the user navigate the concepts. Each group has a display and/or a code, and a list of members, which are either concepts in the value set, or other groups (by code).",
"fhirVersion": "4.0.1",
"mapping": [
  {
    "identity": "rim",
    "uri": "http://hl7.org/v3",
    "name": "RIM Mapping"
  }
],
"kind": "complex-type",
"abstract": false,
"context": [
  {
    "type": "element",
    "expression": "ValueSet.compose.include"
  }
],
"type": "Extension",
"baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension",
"derivation": "constraint",
"snapshot": {
  "element": [
    {
      "id": "Extension",
      "path": "Extension",
      "short": "Defines a hierarchy structure (when in UI mode)",
      "definition": "This extension declares a group of concepts that is generated into the ValueSet.expansion.contains hierarchy when the expansion is generated for a UI. THere is no inherent assigned meaning to the hierarchy; it is used to help the user navigate the concepts. Each group has a display and/or a code, and a list of members, which are either concepts in the value set, or other groups (by code).",
      "comment": "Note that there are inter-relationships between concept status/properties and the way the groups are built; these are described and documented in the (value set hierarchical example)[d.html]. Note that this extension should be ignored when the expansion is not generated for UI.",
      "min": 0,
      "max": "*",
      "base": {
        "path": "Extension",
        "min": 0,
        "max": "*"
      },
      "condition": [
        "ele-1"
      ],
      "constraint": [
        {
          "key": "ele-1",
          "severity": "error",
          "human": "All FHIR elements must have a @value or children",
          "expression": "hasValue() or (children().count() > id.count())",
          "xpath": "@value|f:*|h:div",
          "source": "http://hl7.org/fhir/StructureDefinition/Element"
        },
        {
          "key": "ext-1",
          "severity": "error",
          "human": "Must have either extensions or value[x], not both",
          "expression": "extension.exists() != value.exists()",
          "xpath": "exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])",
          "source": "http://hl7.org/fhir/StructureDefinition/Extension"
        }
      ],
      "isModifier": false
    },
    {
      "id": "Extension.id",
      "path": "Extension.id",
      "representation": [
        "xmlAttr"
      ],
      "short": "Unique id for inter-element referencing",
      "definition": "Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
      "min": 0,
      "max": "1",
      "base": {
        "path": "Element.id",
        "min": 0,
        "max": "1"
      },
      "type": [
        {
          "extension": [
            {
              "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
              "valueUrl": "string"
            }
          ],
          "code": "http://hl7.org/fhirpath/System.String"
        }
      ],
      "isModifier": false,
      "isSummary": false,
      "mapping": [
        {
          "identity": "rim",
          "map": "n/a"
        }
      ]
    },
    {
      "id": "Extension.extension",
      "path": "Extension.extension",
      "slicing": {
        "discriminator": [
          {
            "type": "value",
            "path": "url"
          }
        ],
        "description": "Extensions are always sliced by (at least) url",
        "rules": "open"
      },
      "short": "Additional content defined by implementations",
      "definition": "May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.",
      "comment": "There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.",
      "alias": [
        "extensions",
        "user content"
      ],
      "min": 0,
      "max": "*",
      "base": {
        "path": "Element.extension",
        "min": 0,
        "max": "*"
      },
      "type": [
        {
          "code": "Extension"
        }
      ],
      "constraint": [
        {
          "key": "ele-1",
          "severity": "error",
          "human": "All FHIR elements must have a @value or children",
          "expression": "hasValue() or (children().count() > id.count())",
          "xpath": "@value|f:*|h:div",
          "source": "http://hl7.org/fhir/StructureDefinition/Element"
        },
        {
          "key": "ext-1",
          "severity": "error",
          "human": "Must have either extensions or value[x], not both",
          "expression": "extension.exists() != value.exists()",
          "xpath": "exists(f:extension)!=exists(f:*[starts-with(local-name(.), \"value\")])",
          "source": "http://hl7.org/fhir/StructureDefinition/Extension"
        }
      ],
      "isModifier": false,
      "isSummary": false,
      "mapping": [
        {
          "identity": "rim",
          "map": "n/a"
        }
      ]
    },
    {
      "id": "Extension.extension:code",
      "path": "Extension.extension",
      "sliceName": "code",
      "short": "Underlying code from the system",
      "definition": "A reference to a code from the include.system that defines the meaning associated with the group. Note that including the code in this extension does not include the code in the value set; if the code is intended to be in the value set, it must be listed directly as well.",
      "comment": "If there is no code, the group purely exists for display, and has no underlying meaning.",
      "min": 0,
      "max": "1",
      "base": {
        "path": "Element.extension",
        "min": 0,
        "max": "*"
      },
      "type": [
        {
          "code": "Extension"
        }
      ],
      "constraint": [
        {
          "key": "ele-1",
          "severity": "error",
          "human": "All FHIR elements must have a @value or children",
          "expression": "hasValue() or (children().count() > id.count())",
          "xpath": "@value|f:*|h:div",
          "source": "http://hl7.org/fhir/StructureDefinition/Element"
        },
        {
          "key": "ext-1",
          "severity": "error",
          "human": "Must have either extensions or value[x], not both",
          "expression": "extension.exists() != value.exists()",
          "xpath": "exists(f:extension)!=exists(f:*[starts-with(local-name(.), \"value\")])",
          "source": "http://hl7.org/fhir/StructureDefinition/Extension"
        }
      ],
      "isModifier": false,
      "isSummary": false
    },
    {
      "id": "Extension.extension:code.id",
      "path": "Extension.extension.id",
      "representation": [
        "xmlAttr"
      ],
      "short": "Unique id for inter-element referencing",
      "definition": "Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
      "min": 0,
      "max": "1",
      "base": {
        "path": "Element.id",
        "min": 0,
        "max": "1"
      },
      "type": [
        {
          "extension": [
            {
              "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
              "valueUrl": "string"
            }
          ],
          "code": "http://hl7.org/fhirpath/System.String"
        }
      ],
      "isModifier": false,
      "isSummary": false,
      "mapping": [
        {
          "identity": "rim",
          "map": "n/a"
        }
      ]
    },
    {
      "id": "Extension.extension:code.extension",
      "path": "Extension.extension.extension",
      "slicing": {
        "discriminator": [
          {
            "type": "value",
            "path": "url"
          }
        ],
        "description": "Extensions are always sliced by (at least) url",
        "rules": "open"
      },
      "short": "Extension",
      "definition": "An Extension",
      "min": 0,
      "max": "0",
      "base": {
        "path": "Element.extension",
        "min": 0,
        "max": "*"
      },
      "type": [
        {
          "code": "Extension"
        }
      ],
      "constraint": [
        {
          "key": "ele-1",
          "severity": "error",
          "human": "All FHIR elements must have a @value or children",
          "expression": "hasValue() or (children().count() > id.count())",
          "xpath": "@value|f:*|h:div",
          "source": "http://hl7.org/fhir/StructureDefinition/Element"
        },
        {
          "key": "ext-1",
          "severity": "error",
          "human": "Must have either extensions or value[x], not both",
          "expression": "extension.exists() != value.exists()",
          "xpath": "exists(f:extension)!=exists(f:*[starts-with(local-name(.), \"value\")])",
          "source": "http://hl7.org/fhir/StructureDefinition/Extension"
        }
      ],
      "isModifier": false,
      "isSummary": false
    },
    {
      "id": "Extension.extension:code.url",
      "path": "Extension.extension.url",
      "representation": [
        "xmlAttr"
      ],
      "short": "identifies the meaning of the extension",
      "definition": "Source of the definition for the extension code - a logical name or a URL.",
      "comment": "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
      "min": 1,
      "max": "1",
      "base": {
        "path": "Extension.url",
        "min": 1,
        "max": "1"
      },
      "type": [
        {
          "code": "uri"
        }
      ],
      "fixedUri": "code",
      "isModifier": false,
      "isSummary": false,
      "mapping": [
        {
          "identity": "rim",
          "map": "N/A"
        }
      ]
    },
    {
      "id": "Extension.extension:code.value[x]",
      "path": "Extension.extension.value[x]",
      "short": "Value of extension",
      "definition": "Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/extensibility.html) for a list).",
      "min": 1,
      "max": "1",
      "base": {
        "path": "Extension.value[x]",
        "min": 0,
        "max": "1"
      },
      "type": [
        {
          "code": "code"
        }
      ],
      "constraint": [
        {
          "key": "ele-1",
          "severity": "error",
          "human": "All FHIR elements must have a @value or children",
          "expression": "hasValue() or (children().count() > id.count())",
          "xpath": "@value|f:*|h:div",
          "source": "http://hl7.org/fhir/StructureDefinition/Element"
        }
      ],
      "isModifier": false,
      "isSummary": false,
      "mapping": [
        {
          "identity": "rim",
          "map": "N/A"
        }
      ]
    },
    {
      "id": "Extension.extension:display",
      "path": "Extension.extension",
      "sliceName": "display",
      "short": "Display for the group",
      "definition": "The description for the group (goes in ValueSet.expansion.contains.dispaly). All groups need a display; this can only be omitted if there is a code that can be used to determine the display.",
      "min": 0,
      "max": "1",
      "base": {
        "path": "Element.extension",
        "min": 0,
        "max": "*"
      },
      "type": [
        {
          "code": "Extension"
        }
      ],
      "constraint": [
        {
          "key": "ele-1",
          "severity": "error",
          "human": "All FHIR elements must have a @value or children",
          "expression": "hasValue() or (children().count() > id.count())",
          "xpath": "@value|f:*|h:div",
          "source": "http://hl7.org/fhir/StructureDefinition/Element"
        },
        {
          "key": "ext-1",
          "severity": "error",
          "human": "Must have either extensions or value[x], not both",
          "expression": "extension.exists() != value.exists()",
          "xpath": "exists(f:extension)!=exists(f:*[starts-with(local-name(.), \"value\")])",
          "source": "http://hl7.org/fhir/StructureDefinition/Extension"
        }
      ],
      "isModifier": false,
      "isSummary": false
    },
    {
      "id": "Extension.extension:display.id",
      "path": "Extension.extension.id",
      "representation": [
        "xmlAttr"
      ],
      "short": "Unique id for inter-element referencing",
      "definition": "Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
      "min": 0,
      "max": "1",
      "base": {
        "path": "Element.id",
        "min": 0,
        "max": "1"
      },
      "type": [
        {
          "extension": [
            {
              "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
              "valueUrl": "string"
            }
          ],
          "code": "http://hl7.org/fhirpath/System.String"
        }
      ],
      "isModifier": false,
      "isSummary": false,
      "mapping": [
        {
          "identity": "rim",
          "map": "n/a"
        }
      ]
    },
    {
      "id": "Extension.extension:display.extension",
      "path": "Extension.extension.extension",
      "slicing": {
        "discriminator": [
          {
            "type": "value",
            "path": "url"
          }
        ],
        "description": "Extensions are always sliced by (at least) url",
        "rules": "open"
      },
      "short": "Extension",
      "definition": "An Extension",
      "min": 0,
      "max": "0",
      "base": {
        "path": "Element.extension",
        "min": 0,
        "max": "*"
      },
      "type": [
        {
          "code": "Extension"
        }
      ],
      "constraint": [
        {
          "key": "ele-1",
          "severity": "error",
          "human": "All FHIR elements must have a @value or children",
          "expression": "hasValue() or (children().count() > id.count())",
          "xpath": "@value|f:*|h:div",
          "source": "http://hl7.org/fhir/StructureDefinition/Element"
        },
        {
          "key": "ext-1",
          "severity": "error",
          "human": "Must have either extensions or value[x], not both",
          "expression": "extension.exists() != value.exists()",
          "xpath": "exists(f:extension)!=exists(f:*[starts-with(local-name(.), \"value\")])",
          "source": "http://hl7.org/fhir/StructureDefinition/Extension"
        }
      ],
      "isModifier": false,
      "isSummary": false
    },
    {
      "id": "Extension.extension:display.url",
      "path": "Extension.extension.url",
      "representation": [
        "xmlAttr"
      ],
      "short": "identifies the meaning of the extension",
      "definition": "Source of the definition for the extension code - a logical name or a URL.",
      "comment": "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
      "min": 1,
      "max": "1",
      "base": {
        "path": "Extension.url",
        "min": 1,
        "max": "1"
      },
      "type": [
        {
          "code": "uri"
        }
      ],
      "fixedUri": "display",
      "isModifier": false,
      "isSummary": false,
      "mapping": [
        {
          "identity": "rim",
          "map": "N/A"
        }
      ]
    },
    {
      "id": "Extension.extension:display.value[x]",
      "path": "Extension.extension.value[x]",
      "short": "Value of extension",
      "definition": "Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/extensibility.html) for a list).",
      "min": 1,
      "max": "1",
      "base": {
        "path": "Extension.value[x]",
        "min": 0,
        "max": "1"
      },
      "type": [
        {
          "code": "string"
        }
      ],
      "constraint": [
        {
          "key": "ele-1",
          "severity": "error",
          "human": "All FHIR elements must have a @value or children",
          "expression": "hasValue() or (children().count() > id.count())",
          "xpath": "@value|f:*|h:div",
          "source": "http://hl7.org/fhir/StructureDefinition/Element"
        }
      ],
      "isModifier": false,
      "isSummary": false,
      "mapping": [
        {
          "identity": "rim",
          "map": "N/A"
        }
      ]
    },
    {
      "id": "Extension.extension:member",
      "path": "Extension.extension",
      "sliceName": "member",
      "short": "Codes or other groups in this group",
      "definition": "One of more codes that identify codes in the expansion or other groups.",
      "comment": "A group without a code can be included by giving it an id and using #[id] in place of the code.",
      "min": 1,
      "max": "*",
      "base": {
        "path": "Element.extension",
        "min": 0,
        "max": "*"
      },
      "type": [
        {
          "code": "Extension"
        }
      ],
      "constraint": [
        {
          "key": "ele-1",
          "severity": "error",
          "human": "All FHIR elements must have a @value or children",
          "expression": "hasValue() or (children().count() > id.count())",
          "xpath": "@value|f:*|h:div",
          "source": "http://hl7.org/fhir/StructureDefinition/Element"
        },
        {
          "key": "ext-1",
          "severity": "error",
          "human": "Must have either extensions or value[x], not both",
          "expression": "extension.exists() != value.exists()",
          "xpath": "exists(f:extension)!=exists(f:*[starts-with(local-name(.), \"value\")])",
          "source": "http://hl7.org/fhir/StructureDefinition/Extension"
        }
      ],
      "isModifier": false,
      "isSummary": false
    },
    {
      "id": "Extension.extension:member.id",
      "path": "Extension.extension.id",
      "representation": [
        "xmlAttr"
      ],
      "short": "Unique id for inter-element referencing",
      "definition": "Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
      "min": 0,
      "max": "1",
      "base": {
        "path": "Element.id",
        "min": 0,
        "max": "1"
      },
      "type": [
        {
          "extension": [
            {
              "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
              "valueUrl": "string"
            }
          ],
          "code": "http://hl7.org/fhirpath/System.String"
        }
      ],
      "isModifier": false,
      "isSummary": false,
      "mapping": [
        {
          "identity": "rim",
          "map": "n/a"
        }
      ]
    },
    {
      "id": "Extension.extension:member.extension",
      "path": "Extension.extension.extension",
      "slicing": {
        "discriminator": [
          {
            "type": "value",
            "path": "url"
          }
        ],
        "description": "Extensions are always sliced by (at least) url",
        "rules": "open"
      },
      "short": "Extension",
      "definition": "An Extension",
      "min": 0,
      "max": "0",
      "base": {
        "path": "Element.extension",
        "min": 0,
        "max": "*"
      },
      "type": [
        {
          "code": "Extension"
        }
      ],
      "constraint": [
        {
          "key": "ele-1",
          "severity": "error",
          "human": "All FHIR elements must have a @value or children",
          "expression": "hasValue() or (children().count() > id.count())",
          "xpath": "@value|f:*|h:div",
          "source": "http://hl7.org/fhir/StructureDefinition/Element"
        },
        {
          "key": "ext-1",
          "severity": "error",
          "human": "Must have either extensions or value[x], not both",
          "expression": "extension.exists() != value.exists()",
          "xpath": "exists(f:extension)!=exists(f:*[starts-with(local-name(.), \"value\")])",
          "source": "http://hl7.org/fhir/StructureDefinition/Extension"
        }
      ],
      "isModifier": false,
      "isSummary": false
    },
    {
      "id": "Extension.extension:member.url",
      "path": "Extension.extension.url",
      "representation": [
        "xmlAttr"
      ],
      "short": "identifies the meaning of the extension",
      "definition": "Source of the definition for the extension code - a logical name or a URL.",
      "comment": "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
      "min": 1,
      "max": "1",
      "base": {
        "path": "Extension.url",
        "min": 1,
        "max": "1"
      },
      "type": [
        {
          "code": "uri"
        }
      ],
      "fixedUri": "member",
      "isModifier": false,
      "isSummary": false,
      "mapping": [
        {
          "identity": "rim",
          "map": "N/A"
        }
      ]
    },
    {
      "id": "Extension.extension:member.value[x]",
      "path": "Extension.extension.value[x]",
      "short": "Value of extension",
      "definition": "Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/extensibility.html) for a list).",
      "min": 1,
      "max": "1",
      "base": {
        "path": "Extension.value[x]",
        "min": 0,
        "max": "1"
      },
      "type": [
        {
          "code": "code"
        }
      ],
      "constraint": [
        {
          "key": "ele-1",
          "severity": "error",
          "human": "All FHIR elements must have a @value or children",
          "expression": "hasValue() or (children().count() > id.count())",
          "xpath": "@value|f:*|h:div",
          "source": "http://hl7.org/fhir/StructureDefinition/Element"
        }
      ],
      "isModifier": false,
      "isSummary": false,
      "mapping": [
        {
          "identity": "rim",
          "map": "N/A"
        }
      ]
    },
    {
      "id": "Extension.url",
      "path": "Extension.url",
      "representation": [
        "xmlAttr"
      ],
      "short": "identifies the meaning of the extension",
      "definition": "Source of the definition for the extension code - a logical name or a URL.",
      "comment": "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
      "min": 1,
      "max": "1",
      "base": {
        "path": "Extension.url",
        "min": 1,
        "max": "1"
      },
      "type": [
        {
          "extension": [
            {
              "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
              "valueUrl": "uri"
            }
          ],
          "code": "http://hl7.org/fhirpath/System.String"
        }
      ],
      "fixedUri": "http://hl7.org/fhir/StructureDefinition/valueset-expand-group",
      "isModifier": false,
      "isSummary": false,
      "mapping": [
        {
          "identity": "rim",
          "map": "N/A"
        }
      ]
    },
    {
      "id": "Extension.value[x]",
      "path": "Extension.value[x]",
      "short": "Value of extension",
      "definition": "Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/extensibility.html) for a list).",
      "min": 0,
      "max": "0",
      "base": {
        "path": "Extension.value[x]",
        "min": 0,
        "max": "1"
      },
      "type": [
        {
          "code": "base64Binary"
        },
        {
          "code": "boolean"
        },
        {
          "code": "canonical"
        },
        {
          "code": "code"
        },
        {
          "code": "date"
        },
        {
          "code": "dateTime"
        },
        {
          "code": "decimal"
        },
        {
          "code": "id"
        },
        {
          "code": "instant"
        },
        {
          "code": "integer"
        },
        {
          "code": "markdown"
        },
        {
          "code": "oid"
        },
        {
          "code": "positiveInt"
        },
        {
          "code": "string"
        },
        {
          "code": "time"
        },
        {
          "code": "unsignedInt"
        },
        {
          "code": "uri"
        },
        {
          "code": "url"
        },
        {
          "code": "uuid"
        },
        {
          "code": "Address"
        },
        {
          "code": "Age"
        },
        {
          "code": "Annotation"
        },
        {
          "code": "Attachment"
        },
        {
          "code": "CodeableConcept"
        },
        {
          "code": "Coding"
        },
        {
          "code": "ContactPoint"
        },
        {
          "code": "Count"
        },
        {
          "code": "Distance"
        },
        {
          "code": "Duration"
        },
        {
          "code": "HumanName"
        },
        {
          "code": "Identifier"
        },
        {
          "code": "Money"
        },
        {
          "code": "Period"
        },
        {
          "code": "Quantity"
        },
        {
          "code": "Range"
        },
        {
          "code": "Ratio"
        },
        {
          "code": "Reference"
        },
        {
          "code": "SampledData"
        },
        {
          "code": "Signature"
        },
        {
          "code": "Timing"
        },
        {
          "code": "ContactDetail"
        },
        {
          "code": "Contributor"
        },
        {
          "code": "DataRequirement"
        },
        {
          "code": "Expression"
        },
        {
          "code": "ParameterDefinition"
        },
        {
          "code": "RelatedArtifact"
        },
        {
          "code": "TriggerDefinition"
        },
        {
          "code": "UsageContext"
        },
        {
          "code": "Dosage"
        },
        {
          "code": "Meta"
        }
      ],
      "constraint": [
        {
          "key": "ele-1",
          "severity": "error",
          "human": "All FHIR elements must have a @value or children",
          "expression": "hasValue() or (children().count() > id.count())",
          "xpath": "@value|f:*|h:div",
          "source": "http://hl7.org/fhir/StructureDefinition/Element"
        }
      ],
      "isModifier": false,
      "isSummary": false,
      "mapping": [
        {
          "identity": "rim",
          "map": "N/A"
        }
      ]
    }
  ]
},
"differential": {
  "element": [
    {
      "id": "Extension",
      "path": "Extension",
      "short": "Defines a hierarchy structure (when in UI mode)",
      "definition": "This extension declares a group of concepts that is generated into the ValueSet.expansion.contains hierarchy when the expansion is generated for a UI. THere is no inherent assigned meaning to the hierarchy; it is used to help the user navigate the concepts. Each group has a display and/or a code, and a list of members, which are either concepts in the value set, or other groups (by code).",
      "comment": "Note that there are inter-relationships between concept status/properties and the way the groups are built; these are described and documented in the (value set hierarchical example)[d.html]. Note that this extension should be ignored when the expansion is not generated for UI.",
      "min": 0,
      "max": "*",
      "isModifier": false
    },
    {
      "id": "Extension.extension:code",
      "path": "Extension.extension",
      "sliceName": "code",
      "short": "Underlying code from the system",
      "definition": "A reference to a code from the include.system that defines the meaning associated with the group. Note that including the code in this extension does not include the code in the value set; if the code is intended to be in the value set, it must be listed directly as well.",
      "comment": "If there is no code, the group purely exists for display, and has no underlying meaning.",
      "min": 0,
      "max": "1",
      "type": [
        {
          "code": "Extension"
        }
      ]
    },
    {
      "id": "Extension.extension:code.extension",
      "path": "Extension.extension.extension",
      "max": "0"
    },
    {
      "id": "Extension.extension:code.url",
      "path": "Extension.extension.url",
      "type": [
        {
          "code": "uri"
        }
      ],
      "fixedUri": "code"
    },
    {
      "id": "Extension.extension:code.value[x]",
      "path": "Extension.extension.value[x]",
      "min": 1,
      "type": [
        {
          "code": "code"
        }
      ]
    },
    {
      "id": "Extension.extension:display",
      "path": "Extension.extension",
      "sliceName": "display",
      "short": "Display for the group",
      "definition": "The description for the group (goes in ValueSet.expansion.contains.dispaly). All groups need a display; this can only be omitted if there is a code that can be used to determine the display.",
      "min": 0,
      "max": "1",
      "type": [
        {
          "code": "Extension"
        }
      ]
    },
    {
      "id": "Extension.extension:display.extension",
      "path": "Extension.extension.extension",
      "max": "0"
    },
    {
      "id": "Extension.extension:display.url",
      "path": "Extension.extension.url",
      "type": [
        {
          "code": "uri"
        }
      ],
      "fixedUri": "display"
    },
    {
      "id": "Extension.extension:display.value[x]",
      "path": "Extension.extension.value[x]",
      "min": 1,
      "type": [
        {
          "code": "string"
        }
      ]
    },
    {
      "id": "Extension.extension:member",
      "path": "Extension.extension",
      "sliceName": "member",
      "short": "Codes or other groups in this group",
      "definition": "One of more codes that identify codes in the expansion or other groups.",
      "comment": "A group without a code can be included by giving it an id and using #[id] in place of the code.",
      "min": 1,
      "max": "*",
      "type": [
        {
          "code": "Extension"
        }
      ]
    },
    {
      "id": "Extension.extension:member.extension",
      "path": "Extension.extension.extension",
      "max": "0"
    },
    {
      "id": "Extension.extension:member.url",
      "path": "Extension.extension.url",
      "type": [
        {
          "code": "uri"
        }
      ],
      "fixedUri": "member"
    },
    {
      "id": "Extension.extension:member.value[x]",
      "path": "Extension.extension.value[x]",
      "min": 1,
      "type": [
        {
          "code": "code"
        }
      ]
    },
    {
      "id": "Extension.url",
      "path": "Extension.url",
      "fixedUri": "http://hl7.org/fhir/StructureDefinition/valueset-expand-group"
    },
    {
      "id": "Extension.value[x]",
      "path": "Extension.value[x]",
      "min": 0,
      "max": "0"
    }
  ]
}

}