AU Base Implementation Guide
6.0.0-preview - Preview

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## Data Type Profile: AUAustralianCompanyNumber - JSON Profile

Page standards status: Trial-use | Maturity Level: 2

JSON representation of the au-australiancompanynumber data type profile.

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    {
      "resourceType" : "StructureDefinition",
      "id" : "au-australiancompanynumber",
      "text" : {
        "status" : "extensions",
        "div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\"><p class=\"res-header-id\"><b>Generated Narrative: StructureDefinition au-australiancompanynumber</b></p><a name=\"au-australiancompanynumber\"> </a><a name=\"hcau-australiancompanynumber\"> </a><table border=\"0\" cellpadding=\"0\" cellspacing=\"0\" style=\"border: 0px #F0F0F0 solid; font-size: 11px; font-family: verdana; vertical-align: top;\"><tr style=\"border: 1px #F0F0F0 solid; font-size: 11px; font-family: verdana; vertical-align: top\"><th style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom: 3px\" class=\"hierarchy\"><a href=\"https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views\" title=\"The logical name of the element\">Name</a></th><th style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom: 3px\" class=\"hierarchy\"><a href=\"https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views\" title=\"Information about the use of the element\">Flags</a></th><th style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom: 3px\" class=\"hierarchy\"><a href=\"https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views\" title=\"Minimum and Maximum # of times the element can appear in the instance\">Card.</a></th><th style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom: 3px; width: 100px\" class=\"hierarchy\"><a href=\"https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views\" title=\"Reference to the type of the element\">Type</a></th><th style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom: 3px\" class=\"hierarchy\"><a href=\"https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views\" title=\"Additional information about the element\">Description &amp; Constraints</a><span style=\"float: right\"><a href=\"https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views\" title=\"Legend for this format\"><img src=\"data:image/png;base64, \" alt=\"doco\" style=\"background-color: inherit\"/></a></span></th></tr><tr style=\"border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white\"><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck1.png)\" class=\"hierarchy\"><img src=\"tbl_spacer.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"icon_element.gif\" alt=\".\" style=\"background-color: white; background-color: inherit\" title=\"Element\" class=\"hierarchy\"/> <a href=\"StructureDefinition-au-australiancompanynumber-definitions.html#Identifier\" title=\"Australian Company Number (ACN) assigned by the Australian Securities and Investment Commission (ASIC) to a registered company.\">Identifier</a><a name=\"Identifier\"> </a></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><a style=\"padding-left: 3px; padding-right: 3px; border: 1px maroon solid; font-weight: bold; color: #301212; background-color: #fdf4f4;; padding-left: 3px; padding-right: 3px; border: 1px maroon solid; font-weight: bold; color: #301212; background-color: #fdf4f4;\" href=\"http://hl7.org/fhir/R4/conformance-rules.html#constraints\" title=\"This element has or is affected by constraints ( inv-acn-0 )\">C</a></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><span style=\"opacity: 0.5\">0</span><span style=\"opacity: 0.5\">..</span><span style=\"opacity: 0.5\">*</span></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><a href=\"http://hl7.org/fhir/R4/datatypes.html#Identifier\">Identifier</a></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\">Australian Company Number (ACN)<br class=\"constraint\"/><span title=\"null\" class=\"constraint\">Constraints: </span><span style=\"font-weight:bold\" title=\"ACN shall be 9 digits\" class=\"constraint\">inv-acn-0</span></td></tr>\r\n<tr style=\"border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: #F7F7F7\"><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck10.png)\" class=\"hierarchy\"><img src=\"tbl_spacer.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"tbl_vjoin.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"icon_element.gif\" alt=\".\" style=\"background-color: #F7F7F7; background-color: inherit\" title=\"Element\" class=\"hierarchy\"/> <a href=\"StructureDefinition-au-australiancompanynumber-definitions.html#Identifier.type\">type</a><a name=\"Identifier.type\"> </a></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"/><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\">1..<span style=\"opacity: 0.5\">1</span></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><a style=\"opacity: 0.5; opacity: 0.5\" href=\"http://hl7.org/fhir/R4/datatypes.html#CodeableConcept\">CodeableConcept</a></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><span style=\"opacity: 0.5\">Description of identifier</span><br class=\"binding\"/><span style=\"font-weight:bold\" title=\"null\" class=\"binding\">Binding: </span><a href=\"ValueSet-au-v2-0203-extended.html\" title=\"http://terminology.hl7.org.au/ValueSet/v2-0203-extended\" class=\"binding\">hl7VS-identifierType - AU Extended</a><span title=\"null\" class=\"binding\"> (</span><a href=\"http://hl7.org/fhir/R4/terminologies.html#extensible\" title=\"To be conformant, the concept in this element SHALL be from the specified value set if any of the codes within the value set can apply to the concept being communicated.  If the value set does not cover the concept (based on human review), alternate codings (or, data type allowing, text) may be included instead.\" class=\"binding\">extensible</a><span title=\"null\" class=\"binding\">)</span></td></tr>\r\n<tr style=\"border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white\"><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck10.png)\" class=\"hierarchy\"><img src=\"tbl_spacer.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"tbl_vjoin.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"icon_element.gif\" alt=\".\" style=\"background-color: white; background-color: inherit\" title=\"Element\" class=\"hierarchy\"/> <a href=\"StructureDefinition-au-australiancompanynumber-definitions.html#Identifier.system\">system</a><a name=\"Identifier.system\"> </a></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"/><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\">1..<span style=\"opacity: 0.5\">1</span></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><a style=\"opacity: 0.5; opacity: 0.5\" href=\"http://hl7.org/fhir/R4/datatypes.html#uri\">uri</a></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><span style=\"opacity: 0.5\">The namespace for the identifier value</span><br/><span style=\"font-weight:bold\">Fixed Value: </span><span style=\"color: darkgreen\">http://hl7.org.au/id/acn</span></td></tr>\r\n<tr style=\"border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: #F7F7F7\"><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck00.png)\" class=\"hierarchy\"><img src=\"tbl_spacer.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"tbl_vjoin_end.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"icon_element.gif\" alt=\".\" style=\"background-color: #F7F7F7; background-color: inherit\" title=\"Element\" class=\"hierarchy\"/> <a href=\"StructureDefinition-au-australiancompanynumber-definitions.html#Identifier.value\">value</a><a name=\"Identifier.value\"> </a></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"/><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\">1..<span style=\"opacity: 0.5\">1</span></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><a style=\"opacity: 0.5; opacity: 0.5\" href=\"http://hl7.org/fhir/R4/datatypes.html#string\">string</a></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\">ACN</td></tr>\r\n<tr><td colspan=\"5\" class=\"hierarchy\"><br/><a href=\"https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views\" title=\"Legend for this format\"><img src=\"data:image/png;base64, \" alt=\"doco\" style=\"background-color: inherit\"/> Documentation for this format</a></td></tr></table></div>"
      },
      "extension" : [
        {
          "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
          "valueInteger" : 2
        },
        {
          "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status",
          "valueCode" : "trial-use",
          "_valueCode" : {
            "extension" : [
              {
                "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom",
                "valueCanonical" : "http://hl7.org.au/fhir/ImplementationGuide/hl7.fhir.au.base"
              }
            ]
          }
        }
      ],
      "url" : "http://hl7.org.au/fhir/StructureDefinition/au-australiancompanynumber",
      "version" : "6.0.0-preview",
      "name" : "AUAustralianCompanyNumber",
      "title" : "AU Australian Company Number",
      "status" : "active",
      "date" : "2025-11-26T07:22:59+00:00",
      "publisher" : "HL7 Australia",
      "contact" : [
        {
          "name" : "HL7 Australia FHIR Working Group",
          "telecom" : [
            {
              "system" : "url",
              "value" : "https://confluence.hl7.org/display/HAFWG",
              "use" : "work"
            }
          ]
        }
      ],
      "description" : "This identifier profile defines an Australian Company Number in an Australian context. An ACN is allocated by the Australian Securities and Investments Commission (ASIC) when a body becomes registered as a company under Corporations Law.",
      "jurisdiction" : [
        {
          "coding" : [
            {
              "system" : "urn:iso:std:iso:3166",
              "code" : "AU"
            }
          ]
        }
      ],
      "copyright" : "HL7 Australia© 2018+; Licensed Under Creative Commons No Rights Reserved.",
      "fhirVersion" : "4.0.1",
      "mapping" : [
        {
          "identity" : "v2",
          "uri" : "http://hl7.org/v2",
          "name" : "HL7 v2 Mapping"
        },
        {
          "identity" : "rim",
          "uri" : "http://hl7.org/v3",
          "name" : "RIM Mapping"
        },
        {
          "identity" : "servd",
          "uri" : "http://www.omg.org/spec/ServD/1.0/",
          "name" : "ServD"
        }
      ],
      "kind" : "complex-type",
      "abstract" : false,
      "type" : "Identifier",
      "baseDefinition" : "http://hl7.org/fhir/StructureDefinition/Identifier",
      "derivation" : "constraint",
      "snapshot" : {
        "extension" : [
          {
            "url" : "http://hl7.org/fhir/tools/StructureDefinition/snapshot-base-version",
            "valueString" : "4.0.1"
          }
        ],
        "element" : [
          {
            "id" : "Identifier",
            "path" : "Identifier",
            "short" : "Australian Company Number (ACN)",
            "definition" : "Australian Company Number (ACN) assigned by the Australian Securities and Investment Commission (ASIC) to a registered company.",
            "min" : 0,
            "max" : "*",
            "base" : {
              "path" : "Identifier",
              "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" : "inv-acn-0",
                "severity" : "error",
                "human" : "ACN shall be 9 digits",
                "expression" : "value.matches('^([0-9]{9})$')",
                "source" : "http://hl7.org.au/fhir/StructureDefinition/au-australiancompanynumber"
              }
            ],
            "isModifier" : false,
            "mapping" : [
              {
                "identity" : "rim",
                "map" : "n/a"
              },
              {
                "identity" : "v2",
                "map" : "CX / EI (occasionally, more often EI maps to a resource id or a URL)"
              },
              {
                "identity" : "rim",
                "map" : "II - The Identifier class is a little looser than the v3 type II because it allows URIs as well as registered OIDs or GUIDs.  Also maps to Role[classCode=IDENT]"
              },
              {
                "identity" : "servd",
                "map" : "Identifier"
              }
            ]
          },
          {
            "id" : "Identifier.id",
            "path" : "Identifier.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" : "Identifier.extension",
            "path" : "Identifier.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" : "Identifier.use",
            "path" : "Identifier.use",
            "short" : "usual | official | temp | secondary | old (If known)",
            "definition" : "The purpose of this identifier.",
            "comment" : "Applications can assume that an identifier is permanent unless it explicitly says that it is temporary.",
            "requirements" : "Allows the appropriate identifier for a particular context of use to be selected from among a set of identifiers.",
            "min" : 0,
            "max" : "1",
            "base" : {
              "path" : "Identifier.use",
              "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" : true,
            "isModifierReason" : "This is labeled as \"Is Modifier\" because applications should not mistake a temporary id for a permanent one.",
            "isSummary" : true,
            "binding" : {
              "extension" : [
                {
                  "url" : "http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName",
                  "valueString" : "IdentifierUse"
                }
              ],
              "strength" : "required",
              "description" : "Identifies the purpose for this identifier, if known .",
              "valueSet" : "http://hl7.org/fhir/ValueSet/identifier-use|4.0.1"
            },
            "mapping" : [
              {
                "identity" : "v2",
                "map" : "N/A"
              },
              {
                "identity" : "rim",
                "map" : "Role.code or implied by context"
              }
            ]
          },
          {
            "id" : "Identifier.type",
            "path" : "Identifier.type",
            "short" : "Description of identifier",
            "definition" : "A coded type for the identifier that can be used to determine which identifier to use for a specific purpose.",
            "comment" : "This element deals only with general categories of identifiers.  It SHOULD not be used for codes that correspond 1..1 with the Identifier.system. Some identifiers may fall into multiple categories due to common usage.   Where the system is known, a type is unnecessary because the type is always part of the system definition. However systems often need to handle identifiers where the system is not known. There is not a 1:1 relationship between type and system, since many different systems have the same type.",
            "requirements" : "Allows users to make use of identifiers when the identifier system is not known.",
            "min" : 1,
            "max" : "1",
            "base" : {
              "path" : "Identifier.type",
              "min" : 0,
              "max" : "1"
            },
            "type" : [
              {
                "code" : "CodeableConcept"
              }
            ],
            "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" : true,
            "binding" : {
              "strength" : "extensible",
              "valueSet" : "http://terminology.hl7.org.au/ValueSet/v2-0203-extended"
            },
            "mapping" : [
              {
                "identity" : "v2",
                "map" : "CX.5"
              },
              {
                "identity" : "rim",
                "map" : "Role.code or implied by context"
              }
            ]
          },
          {
            "id" : "Identifier.system",
            "path" : "Identifier.system",
            "short" : "The namespace for the identifier value",
            "definition" : "Establishes the namespace for the value - that is, a URL that describes a set values that are unique.",
            "comment" : "Identifier.system is always case sensitive.",
            "requirements" : "There are many sets  of identifiers.  To perform matching of two identifiers, we need to know what set we're dealing with. The system identifies a particular set of unique identifiers.",
            "min" : 1,
            "max" : "1",
            "base" : {
              "path" : "Identifier.system",
              "min" : 0,
              "max" : "1"
            },
            "type" : [
              {
                "code" : "uri"
              }
            ],
            "fixedUri" : "http://hl7.org.au/id/acn",
            "example" : [
              {
                "label" : "General",
                "valueUri" : "http://www.acme.com/identifiers/patient"
              }
            ],
            "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" : true,
            "mapping" : [
              {
                "identity" : "v2",
                "map" : "CX.4 / EI-2-4"
              },
              {
                "identity" : "rim",
                "map" : "II.root or Role.id.root"
              },
              {
                "identity" : "servd",
                "map" : "./IdentifierType"
              }
            ]
          },
          {
            "id" : "Identifier.value",
            "path" : "Identifier.value",
            "short" : "ACN",
            "definition" : "The portion of the identifier typically relevant to the user and which is unique within the context of the system.",
            "comment" : "See information on the [format of the ACN](https://asic.gov.au/for-business/registering-a-company/steps-to-register-a-company/australian-company-numbers/australian-company-number-digit-check) from [ASIC](https://asic.gov.au/).",
            "min" : 1,
            "max" : "1",
            "base" : {
              "path" : "Identifier.value",
              "min" : 0,
              "max" : "1"
            },
            "type" : [
              {
                "code" : "string"
              }
            ],
            "example" : [
              {
                "label" : "General",
                "valueString" : "123456"
              }
            ],
            "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" : true,
            "mapping" : [
              {
                "identity" : "v2",
                "map" : "CX.1 / EI.1"
              },
              {
                "identity" : "rim",
                "map" : "II.extension or II.root if system indicates OID or GUID (Or Role.id.extension or root)"
              },
              {
                "identity" : "servd",
                "map" : "./Value"
              }
            ]
          },
          {
            "id" : "Identifier.period",
            "path" : "Identifier.period",
            "short" : "Time period when id is/was valid for use",
            "definition" : "Time period during which identifier is/was valid for use.",
            "min" : 0,
            "max" : "1",
            "base" : {
              "path" : "Identifier.period",
              "min" : 0,
              "max" : "1"
            },
            "type" : [
              {
                "code" : "Period"
              }
            ],
            "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" : true,
            "mapping" : [
              {
                "identity" : "v2",
                "map" : "CX.7 + CX.8"
              },
              {
                "identity" : "rim",
                "map" : "Role.effectiveTime or implied by context"
              },
              {
                "identity" : "servd",
                "map" : "./StartDate and ./EndDate"
              }
            ]
          },
          {
            "id" : "Identifier.assigner",
            "path" : "Identifier.assigner",
            "short" : "Organization that issued id (may be just text)",
            "definition" : "Organization that issued/manages the identifier.",
            "comment" : "The Identifier.assigner may omit the .reference element and only contain a .display element reflecting the name or other textual information about the assigning organization.",
            "min" : 0,
            "max" : "1",
            "base" : {
              "path" : "Identifier.assigner",
              "min" : 0,
              "max" : "1"
            },
            "type" : [
              {
                "code" : "Reference",
                "targetProfile" : [
                  🔗 "http://hl7.org/fhir/StructureDefinition/Organization|4.0.1"
                ]
              }
            ],
            "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"
              }
            ],
            "isModifier" : false,
            "isSummary" : true,
            "mapping" : [
              {
                "identity" : "v2",
                "map" : "CX.4 / (CX.4,CX.9,CX.10)"
              },
              {
                "identity" : "rim",
                "map" : "II.assigningAuthorityName but note that this is an improper use by the definition of the field.  Also Role.scoper"
              },
              {
                "identity" : "servd",
                "map" : "./IdentifierIssuingAuthority"
              }
            ]
          }
        ]
      },
      "differential" : {
        "element" : [
          {
            "id" : "Identifier",
            "path" : "Identifier",
            "short" : "Australian Company Number (ACN)",
            "definition" : "Australian Company Number (ACN) assigned by the Australian Securities and Investment Commission (ASIC) to a registered company.",
            "constraint" : [
              {
                "key" : "inv-acn-0",
                "severity" : "error",
                "human" : "ACN shall be 9 digits",
                "expression" : "value.matches('^([0-9]{9})$')",
                "source" : "http://hl7.org.au/fhir/StructureDefinition/au-australiancompanynumber"
              }
            ]
          },
          {
            "id" : "Identifier.type",
            "path" : "Identifier.type",
            "min" : 1,
            "binding" : {
              "strength" : "extensible",
              "valueSet" : "http://terminology.hl7.org.au/ValueSet/v2-0203-extended"
            }
          },
          {
            "id" : "Identifier.system",
            "path" : "Identifier.system",
            "min" : 1,
            "fixedUri" : "http://hl7.org.au/id/acn"
          },
          {
            "id" : "Identifier.value",
            "path" : "Identifier.value",
            "short" : "ACN",
            "comment" : "See information on the [format of the ACN](https://asic.gov.au/for-business/registering-a-company/steps-to-register-a-company/australian-company-numbers/australian-company-number-digit-check) from [ASIC](https://asic.gov.au/).",
            "min" : 1
          }
        ]
      }
    }