{
  "resourceType": "StructureDefinition",
  "id": "composition-block-type",
  "url": "https://fhir.apps.health/StructureDefinition/composition-block-type",
  "name": "CompositionBlockType",
  "title": "Composition Block Type Extension",
  "status": "draft",
  "description": "How to render this section -- the section's RENDER KIND, not the tool that produced it.\n\nA `code` from `note-block-types`, bound **extensible**: where this specification names a kind, use\nits code; where an editor ships a kind the guide has not named yet, a code outside the set is\nconformant. **Written on every structured section, whatever its kind** -- no kind is a default\nthat may be left implied, and none has standing the others do not.\n\nA section carrying NO such extension predates it, and is read as `text`. That is what lets every note\nfiled before block authoring existed -- four-section SOAP notes among them -- open with no migration.\nIt is tolerance for legacy data rather than a default new data may rely on, so the branch is\nretirable once no untyped section remains.\n\n**A kind you do not recognise must be kept, not rewritten.** A client whose vocabulary is behind the\nwriter's has no widget for such a section and renders it as text -- correct, because the narrative is\nauthoritative. It MUST still write the unrecognised code back unchanged. Rendering as text is a\ndisplay decision; **storing `text` in its place is data loss**, and leaves the record asserting that\na specialised block was prose. No binding can enforce this, which is why it is stated here.\n\n**FIRST PASS.** This extension arrived with its first consumer rather than from a modelling pass,\nand block authoring is expected to grow around it: kinds join `note-block-types` as they ship, and\nthe surface may widen as it does. **The canonical is settled and will not be renamed.** It moved to\nthis guide's base before the first note carrying it was filed, which was the only moment that move\nwas free; published canonical URLs are forever. What may still change is what the vocabulary holds,\nnot where this extension lives.",
  "fhirVersion": "4.0.1",
  "mapping": [
    {
      "identity": "rim",
      "uri": "http://hl7.org/v3",
      "name": "RIM Mapping"
    }
  ],
  "kind": "complex-type",
  "abstract": false,
  "context": [
    {
      "type": "element",
      "expression": "Composition.section"
    }
  ],
  "type": "Extension",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation": "constraint",
  "snapshot": {
    "element": [
      {
        "id": "Extension",
        "path": "Extension",
        "short": "Composition Block Type Extension",
        "definition": "How to render this section -- the section's RENDER KIND, not the tool that produced it.\n\nA `code` from `note-block-types`, bound **extensible**: where this specification names a kind, use\nits code; where an editor ships a kind the guide has not named yet, a code outside the set is\nconformant. **Written on every structured section, whatever its kind** -- no kind is a default\nthat may be left implied, and none has standing the others do not.\n\nA section carrying NO such extension predates it, and is read as `text`. That is what lets every note\nfiled before block authoring existed -- four-section SOAP notes among them -- open with no migration.\nIt is tolerance for legacy data rather than a default new data may rely on, so the branch is\nretirable once no untyped section remains.\n\n**A kind you do not recognise must be kept, not rewritten.** A client whose vocabulary is behind the\nwriter's has no widget for such a section and renders it as text -- correct, because the narrative is\nauthoritative. It MUST still write the unrecognised code back unchanged. Rendering as text is a\ndisplay decision; **storing `text` in its place is data loss**, and leaves the record asserting that\na specialised block was prose. No binding can enforce this, which is why it is stated here.\n\n**FIRST PASS.** This extension arrived with its first consumer rather than from a modelling pass,\nand block authoring is expected to grow around it: kinds join `note-block-types` as they ship, and\nthe surface may widen as it does. **The canonical is settled and will not be renamed.** It moved to\nthis guide's base before the first note carrying it was filed, which was the only moment that move\nwas free; published canonical URLs are forever. What may still change is what the vocabulary holds,\nnot where this extension lives.",
        "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/composition-block-type",
        "isModifier": false,
        "isSummary": false,
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.value[x]",
        "path": "Extension.value[x]",
        "short": "How to render this section; absent only on sections predating this extension",
        "definition": "The section's render kind, from `note-block-types`. It says HOW a consumer should render the section, not which tool produced it -- `section.author` answers that, and an editor widget, a letter template and a generated summary can all produce the same render kind. Written on every structured section, text included. Absent means the section was written before this extension existed and is read as `text` -- a legacy concession, not a default.",
        "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,
        "binding": {
          "strength": "extensible",
          "valueSet": "https://fhir.apps.health/ValueSet/note-block-types"
        },
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      }
    ]
  },
  "differential": {
    "element": [
      {
        "id": "Extension",
        "path": "Extension",
        "short": "Composition Block Type Extension",
        "definition": "How to render this section -- the section's RENDER KIND, not the tool that produced it.\n\nA `code` from `note-block-types`, bound **extensible**: where this specification names a kind, use\nits code; where an editor ships a kind the guide has not named yet, a code outside the set is\nconformant. **Written on every structured section, whatever its kind** -- no kind is a default\nthat may be left implied, and none has standing the others do not.\n\nA section carrying NO such extension predates it, and is read as `text`. That is what lets every note\nfiled before block authoring existed -- four-section SOAP notes among them -- open with no migration.\nIt is tolerance for legacy data rather than a default new data may rely on, so the branch is\nretirable once no untyped section remains.\n\n**A kind you do not recognise must be kept, not rewritten.** A client whose vocabulary is behind the\nwriter's has no widget for such a section and renders it as text -- correct, because the narrative is\nauthoritative. It MUST still write the unrecognised code back unchanged. Rendering as text is a\ndisplay decision; **storing `text` in its place is data loss**, and leaves the record asserting that\na specialised block was prose. No binding can enforce this, which is why it is stated here.\n\n**FIRST PASS.** This extension arrived with its first consumer rather than from a modelling pass,\nand block authoring is expected to grow around it: kinds join `note-block-types` as they ship, and\nthe surface may widen as it does. **The canonical is settled and will not be renamed.** It moved to\nthis guide's base before the first note carrying it was filed, which was the only moment that move\nwas free; published canonical URLs are forever. What may still change is what the vocabulary holds,\nnot where this extension lives."
      },
      {
        "id": "Extension.extension",
        "path": "Extension.extension",
        "max": "0"
      },
      {
        "id": "Extension.url",
        "path": "Extension.url",
        "fixedUri": "https://fhir.apps.health/StructureDefinition/composition-block-type"
      },
      {
        "id": "Extension.value[x]",
        "path": "Extension.value[x]",
        "short": "How to render this section; absent only on sections predating this extension",
        "definition": "The section's render kind, from `note-block-types`. It says HOW a consumer should render the section, not which tool produced it -- `section.author` answers that, and an editor widget, a letter template and a generated summary can all produce the same render kind. Written on every structured section, text included. Absent means the section was written before this extension existed and is read as `text` -- a legacy concession, not a default.",
        "min": 1,
        "type": [
          {
            "code": "code"
          }
        ],
        "mustSupport": true,
        "binding": {
          "strength": "extensible",
          "valueSet": "https://fhir.apps.health/ValueSet/note-block-types"
        }
      }
    ]
  }
}