{
  "resourceType": "StructureDefinition",
  "id": "meta-updated-by",
  "url": "https://fhir.apps.health/StructureDefinition/meta-updated-by",
  "name": "MetaUpdatedBy",
  "title": "Meta Updated By Extension",
  "status": "draft",
  "description": "The user account that last wrote this version of the resource.\n\n**A display convenience, not an audit record.** It exists so a version list can say who touched each\nversion without fetching a `Provenance` per row. Anything that needs to REASON about authorship --\nrather than print it -- should read `Provenance` or the resource's own author element.\n\n**The value is an identity-provider subject, not a `Reference`.** It names a user account; not every\nwriter has a `Practitioner` resource, and a dangling reference would be worse than a string a\nconsumer can match on. Resolving it to a person needs the identity directory, which this guide does\nnot describe.\n\n**Readers should expect two canonicals.** This publishes under this guide's base; the EMR writes it\ntoday under `http://services.well.com/fhir/StructureDefinition/UpdatedBy`, and because\nthis rides `meta` on every version of every resource ever saved, the old address persists in version\nhistory even after writers move. Match both addresses exactly. The two share no segment, so a suffix\nrule does not reach the pre-migration one and a reader built on it misses every pre-migration\nversion. The handbook's Canonical URLs page indexes every published artifact in this position.",
  "fhirVersion": "4.0.1",
  "mapping": [
    {
      "identity": "rim",
      "uri": "http://hl7.org/v3",
      "name": "RIM Mapping"
    }
  ],
  "kind": "complex-type",
  "abstract": false,
  "context": [
    {
      "type": "element",
      "expression": "Meta"
    }
  ],
  "type": "Extension",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation": "constraint",
  "snapshot": {
    "element": [
      {
        "id": "Extension",
        "path": "Extension",
        "short": "Meta Updated By Extension",
        "definition": "The user account that last wrote this version of the resource.\n\n**A display convenience, not an audit record.** It exists so a version list can say who touched each\nversion without fetching a `Provenance` per row. Anything that needs to REASON about authorship --\nrather than print it -- should read `Provenance` or the resource's own author element.\n\n**The value is an identity-provider subject, not a `Reference`.** It names a user account; not every\nwriter has a `Practitioner` resource, and a dangling reference would be worse than a string a\nconsumer can match on. Resolving it to a person needs the identity directory, which this guide does\nnot describe.\n\n**Readers should expect two canonicals.** This publishes under this guide's base; the EMR writes it\ntoday under `http://services.well.com/fhir/StructureDefinition/UpdatedBy`, and because\nthis rides `meta` on every version of every resource ever saved, the old address persists in version\nhistory even after writers move. Match both addresses exactly. The two share no segment, so a suffix\nrule does not reach the pre-migration one and a reader built on it misses every pre-migration\nversion. The handbook's Canonical URLs page indexes every published artifact in this position.",
        "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')])"
          }
        ],
        "isModifier": false,
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          },
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "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": [
          {
            "code": "http://hl7.org/fhirpath/System.String",
            "extension": [
              {
                "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
                "valueUrl": "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": "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,
        "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": [
          {
            "code": "http://hl7.org/fhirpath/System.String",
            "extension": [
              {
                "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
                "valueUrl": "uri"
              }
            ]
          }
        ],
        "fixedUri": "https://fhir.apps.health/StructureDefinition/meta-updated-by",
        "isModifier": false,
        "isSummary": false,
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.value[x]",
        "path": "Extension.value[x]",
        "short": "Identity-provider subject of the user who wrote this version",
        "definition": "An opaque user-account identifier as the identity provider issues it (for example `auth0|abc123`). NOT a FHIR id and not a Practitioner reference.",
        "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"
          }
        ],
        "mustSupport": true,
        "isModifier": false,
        "isSummary": false,
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      }
    ]
  },
  "differential": {
    "element": [
      {
        "id": "Extension",
        "path": "Extension",
        "short": "Meta Updated By Extension",
        "definition": "The user account that last wrote this version of the resource.\n\n**A display convenience, not an audit record.** It exists so a version list can say who touched each\nversion without fetching a `Provenance` per row. Anything that needs to REASON about authorship --\nrather than print it -- should read `Provenance` or the resource's own author element.\n\n**The value is an identity-provider subject, not a `Reference`.** It names a user account; not every\nwriter has a `Practitioner` resource, and a dangling reference would be worse than a string a\nconsumer can match on. Resolving it to a person needs the identity directory, which this guide does\nnot describe.\n\n**Readers should expect two canonicals.** This publishes under this guide's base; the EMR writes it\ntoday under `http://services.well.com/fhir/StructureDefinition/UpdatedBy`, and because\nthis rides `meta` on every version of every resource ever saved, the old address persists in version\nhistory even after writers move. Match both addresses exactly. The two share no segment, so a suffix\nrule does not reach the pre-migration one and a reader built on it misses every pre-migration\nversion. The handbook's Canonical URLs page indexes every published artifact in this position."
      },
      {
        "id": "Extension.extension",
        "path": "Extension.extension",
        "max": "0"
      },
      {
        "id": "Extension.url",
        "path": "Extension.url",
        "fixedUri": "https://fhir.apps.health/StructureDefinition/meta-updated-by"
      },
      {
        "id": "Extension.value[x]",
        "path": "Extension.value[x]",
        "short": "Identity-provider subject of the user who wrote this version",
        "definition": "An opaque user-account identifier as the identity provider issues it (for example `auth0|abc123`). NOT a FHIR id and not a Practitioner reference.",
        "min": 1,
        "type": [
          {
            "code": "string"
          }
        ],
        "mustSupport": true
      }
    ]
  }
}