{
  "resourceType": "StructureDefinition",
  "id": "nexus-requisition-version-reason",
  "url": "https://fhir.apps.health/StructureDefinition/nexus-requisition-version-reason",
  "name": "NexusRequisitionVersionReason",
  "title": "Requisition Version Reason Extension",
  "status": "draft",
  "description": "Why this version of a laboratory requisition was written -- saved, signed and printed, or printed\nwithout a signature.\n\n**It describes the write, not the resource.** A resource's version history records who changed the\nrequisition and when, but not what they did; against the same author and timestamp, a save and a\nprint are very different events. Each stored version carries its own reason, describing the write\nthat produced that version. Reading the current version tells you only how the requisition last\nchanged -- read the version history for the sequence.\n\n**A code, not a sentence.** The history is rendered in more than one language, so only the code is\nstored and the wording belongs with the surface that renders it.\n\n**Absence is ordinary.** Versions written before this was recorded carry no reason. A consumer must\nrender an absent reason neutrally and must not treat it as an error, or infer any particular one of\nthe three.\n\n**Not a status, and not a signature.** `ServiceRequest.status` is the state of the order. Whether a\nversion is signed is read from the requisition's signature extension, not inferred from\n`signed-printed` here.\n\n**At most one per version.**",
  "fhirVersion": "4.0.1",
  "mapping": [
    {
      "identity": "rim",
      "uri": "http://hl7.org/v3",
      "name": "RIM Mapping"
    }
  ],
  "kind": "complex-type",
  "abstract": false,
  "context": [
    {
      "type": "element",
      "expression": "ServiceRequest"
    }
  ],
  "type": "Extension",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation": "constraint",
  "snapshot": {
    "element": [
      {
        "id": "Extension",
        "path": "Extension",
        "short": "Requisition Version Reason Extension",
        "definition": "Why this version of a laboratory requisition was written -- saved, signed and printed, or printed\nwithout a signature.\n\n**It describes the write, not the resource.** A resource's version history records who changed the\nrequisition and when, but not what they did; against the same author and timestamp, a save and a\nprint are very different events. Each stored version carries its own reason, describing the write\nthat produced that version. Reading the current version tells you only how the requisition last\nchanged -- read the version history for the sequence.\n\n**A code, not a sentence.** The history is rendered in more than one language, so only the code is\nstored and the wording belongs with the surface that renders it.\n\n**Absence is ordinary.** Versions written before this was recorded carry no reason. A consumer must\nrender an absent reason neutrally and must not treat it as an error, or infer any particular one of\nthe three.\n\n**Not a status, and not a signature.** `ServiceRequest.status` is the state of the order. Whether a\nversion is signed is read from the requisition's signature extension, not inferred from\n`signed-printed` here.\n\n**At most one per version.**",
        "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/nexus-requisition-version-reason",
        "isModifier": false,
        "isSummary": false,
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.value[x]",
        "path": "Extension.value[x]",
        "short": "Why this version was written: saved | signed-printed | printed-unsigned",
        "definition": "Which exit produced this version of the requisition. One of three codes:\n\n- `saved` -- the requisition was saved without being printed.\n- `signed-printed` -- the requisition was signed and printed.\n- `printed-unsigned` -- the requisition was printed without a signature.\n\nThis element is not bound to a value set. A consumer must treat any other value the same way it\ntreats an absent one: render the version neutrally rather than failing or guessing, because a value\noutside the three says nothing this guide defines.",
        "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"
          }
        ],
        "mustSupport": true,
        "isModifier": false,
        "isSummary": false,
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      }
    ]
  },
  "differential": {
    "element": [
      {
        "id": "Extension",
        "path": "Extension",
        "short": "Requisition Version Reason Extension",
        "definition": "Why this version of a laboratory requisition was written -- saved, signed and printed, or printed\nwithout a signature.\n\n**It describes the write, not the resource.** A resource's version history records who changed the\nrequisition and when, but not what they did; against the same author and timestamp, a save and a\nprint are very different events. Each stored version carries its own reason, describing the write\nthat produced that version. Reading the current version tells you only how the requisition last\nchanged -- read the version history for the sequence.\n\n**A code, not a sentence.** The history is rendered in more than one language, so only the code is\nstored and the wording belongs with the surface that renders it.\n\n**Absence is ordinary.** Versions written before this was recorded carry no reason. A consumer must\nrender an absent reason neutrally and must not treat it as an error, or infer any particular one of\nthe three.\n\n**Not a status, and not a signature.** `ServiceRequest.status` is the state of the order. Whether a\nversion is signed is read from the requisition's signature extension, not inferred from\n`signed-printed` here.\n\n**At most one per version.**"
      },
      {
        "id": "Extension.extension",
        "path": "Extension.extension",
        "max": "0"
      },
      {
        "id": "Extension.url",
        "path": "Extension.url",
        "fixedUri": "https://fhir.apps.health/StructureDefinition/nexus-requisition-version-reason"
      },
      {
        "id": "Extension.value[x]",
        "path": "Extension.value[x]",
        "short": "Why this version was written: saved | signed-printed | printed-unsigned",
        "definition": "Which exit produced this version of the requisition. One of three codes:\n\n- `saved` -- the requisition was saved without being printed.\n- `signed-printed` -- the requisition was signed and printed.\n- `printed-unsigned` -- the requisition was printed without a signature.\n\nThis element is not bound to a value set. A consumer must treat any other value the same way it\ntreats an absent one: render the version neutrally rather than failing or guessing, because a value\noutside the three says nothing this guide defines.",
        "min": 1,
        "type": [
          {
            "code": "code"
          }
        ],
        "mustSupport": true
      }
    ]
  }
}