{
  "resourceType" : "StructureDefinition",
  "id" : "oid",
  "text" : {
    "status" : "generated",
    "div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n      <p>Primitive type 'oid'</p>\n    </div>"
  },
  "extension" : [{
    "url" : "http://hl7.org/fhir/tools/StructureDefinition/xml-namespace",
    "valueUri" : "urn:hl7-org:v3"
  },
  {
    "url" : "http://hl7.org/fhir/tools/StructureDefinition/logical-container",
    "valueUri" : "http://hl7.org/cda/stds/core/StructureDefinition/ClinicalDocument"
  },
  {
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-type-characteristics",
    "valueCode" : "can-bind"
  }],
  "url" : "http://hl7.org/cda/stds/core/StructureDefinition/oid",
  "version" : "2.0.2-sd",
  "name" : "oid",
  "title" : "oid: ISO Object Identifier",
  "status" : "active",
  "experimental" : false,
  "date" : "2025-12-12T15:29:54+11:00",
  "publisher" : "Health Level 7",
  "contact" : [{
    "name" : "HL7 International - Structured Documents",
    "telecom" : [{
      "system" : "url",
      "value" : "http://www.hl7.org/Special/committees/structure"
    },
    {
      "system" : "email",
      "value" : "structdog@lists.HL7.org"
    }]
  }],
  "description" : "A globally unique string representing an ISO Object Identifier (OID) in a form that consists only of numbers and dots (e.g., '2.16.840.1.113883.3.1').",
  "fhirVersion" : "5.0.0",
  "kind" : "primitive-type",
  "abstract" : false,
  "type" : "string",
  "baseDefinition" : "http://hl7.org/fhir/StructureDefinition/string",
  "derivation" : "constraint",
  "snapshot" : {
    "extension" : [{
      "url" : "http://hl7.org/fhir/tools/StructureDefinition/snapshot-base-version",
      "valueString" : "5.0.0"
    }],
    "element" : [{
      "id" : "string",
      "path" : "string",
      "short" : "Primitive Type string",
      "definition" : "A sequence of Unicode characters",
      "comment" : "Note that FHIR strings SHALL NOT exceed 1,048,576 (1024*1024) characters in size",
      "min" : 0,
      "max" : "*",
      "base" : {
        "path" : "string",
        "min" : 0,
        "max" : "*"
      },
      "constraint" : [{
        "key" : "ele-1",
        "severity" : "error",
        "human" : "All FHIR elements must have a @value or children",
        "expression" : "hasValue() or (children().count() > id.count())",
        "source" : "http://hl7.org/fhir/StructureDefinition/Element"
      },
      {
        "key" : "oid-pattern",
        "severity" : "error",
        "human" : "Must conform to OID (#.#.#), UUID (32 hexadecimal digits separated by hyphens), or RUID (a letter followed by any combination of letters, numbers or hyphens)",
        "expression" : "matches('^[0-2](\\\\.(0|[1-9][0-9]*))+$')"
      }],
      "isModifier" : false,
      "isSummary" : false
    },
    {
      "id" : "string.id",
      "path" : "string.id",
      "representation" : ["xmlAttr"],
      "short" : "xml:id (or equivalent in JSON)",
      "definition" : "unique id for the element within a resource (for internal references)",
      "min" : 0,
      "max" : "0",
      "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
    },
    {
      "id" : "string.extension",
      "path" : "string.extension",
      "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())",
        "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()",
        "source" : "http://hl7.org/fhir/StructureDefinition/Extension"
      }],
      "isModifier" : false,
      "isSummary" : false
    },
    {
      "id" : "string.value",
      "path" : "string.value",
      "representation" : ["xmlAttr"],
      "short" : "Primitive value for string",
      "definition" : "The actual value",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "string.value",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "extension" : [{
          "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
          "valueUrl" : "string"
        },
        {
          "url" : "http://hl7.org/fhir/StructureDefinition/regex",
          "valueString" : "^[\\s\\S]+$"
        }],
        "code" : "http://hl7.org/fhirpath/System.String"
      }],
      "maxLength" : 1048576,
      "isModifier" : false,
      "isSummary" : false
    }]
  },
  "differential" : {
    "element" : [{
      "id" : "string",
      "path" : "string",
      "constraint" : [{
        "key" : "oid-pattern",
        "severity" : "error",
        "human" : "Must conform to OID (#.#.#), UUID (32 hexadecimal digits separated by hyphens), or RUID (a letter followed by any combination of letters, numbers or hyphens)",
        "expression" : "matches('^[0-2](\\\\.(0|[1-9][0-9]*))+$')"
      }]
    },
    {
      "id" : "string.id",
      "path" : "string.id",
      "max" : "0"
    },
    {
      "id" : "string.extension",
      "path" : "string.extension",
      "max" : "0"
    }]
  }
}