Cross-Version Extension for Composition.section.focus in R4

Context of Use

This extension may be used in the following contexts:

• element Composition.section (For version R3)
• extension http://hl7.org/fhir/3.0/StructureDefinition/extension-Composition.section
• element Composition.section (For version R2)
• extension http://hl7.org/fhir/1.0/StructureDefinition/extension-Composition.section

Name	Flags	Card.	Type	Description & Constraints
Extension		0..1	Extension	Who/what the section is about, when it is not about the subject of composition
extension		..0
value[x]		1..	Reference(Resource)
url				"http://hl7.org/fhir/4.0/StructureDefinition/extension-Composition.section.focus"
Documentation for this format

{
  "resourceType" : "StructureDefinition",
  "id" : "xv-r4-cmp.sec.focus",
  "url" : "http://hl7.org/fhir/4.0/StructureDefinition/extension-Composition.section.focus",
  "name" : "XVerExtensionComposition.section.focusR4",
  "title" : "Cross-Version Extension for Composition.section.focus in R4",
  "status" : "active",
  "experimental" : false,
  "publisher" : "Health Level Seven International (Structured Documents)",
  "contact" : [{
    "telecom" : [{
      "system" : "url",
      "value" : "http://hl7.org/fhir"
    }]
  },
  {
    "telecom" : [{
      "system" : "url",
      "value" : "http://www.hl7.org/Special/committees/structure/index.cfm"
    }]
  }],
  "description" : "Cross-Version Extension for Composition.section.focus. Valid in versions R2, R3\r\n\r\nThis is a valid cross-version extension because it's counted as a new element",
  "jurisdiction" : [{
    "coding" : [{
      "system" : "http://unstats.un.org/unsd/methods/m49/m49.htm",
      "code" : "001"
    }]
  }],
  "fhirVersion" : "5.0.0",
  "kind" : "complex-type",
  "abstract" : false,
  "context" : [{
    "extension" : [{
      "extension" : [{
        "url" : "startFhirVersion",
        "valueCode" : "3.0"
      },
      {
        "url" : "endFhirVersion",
        "valueCode" : "3.0"
      }],
      "url" : "http://hl7.org/fhir/StructureDefinition/version-specific-use"
    }],
    "type" : "element",
    "expression" : "Composition.section"
  },
  {
    "type" : "extension",
    "expression" : "http://hl7.org/fhir/3.0/StructureDefinition/extension-Composition.section"
  },
  {
    "extension" : [{
      "extension" : [{
        "url" : "startFhirVersion",
        "valueCode" : "1.0"
      },
      {
        "url" : "endFhirVersion",
        "valueCode" : "1.0"
      }],
      "url" : "http://hl7.org/fhir/StructureDefinition/version-specific-use"
    }],
    "type" : "element",
    "expression" : "Composition.section"
  },
  {
    "type" : "extension",
    "expression" : "http://hl7.org/fhir/1.0/StructureDefinition/extension-Composition.section"
  }],
  "type" : "Extension",
  "baseDefinition" : "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation" : "constraint",
  "differential" : {
    "element" : [{
      "path" : "Extension",
      "short" : "Who/what the section is about, when it is not about the subject of composition",
      "definition" : "The actual focus of the section when it is not the subject of the composition, but instead represents something or someone associated with the subject such as (for a patient subject) a spouse, parent, fetus, or donor. If not focus is specified, the focus is assumed to be focus of the parent section, or, for a section in the Composition itself, the subject of the composition. Sections with a focus SHALL only include resources where the logical subject (patient, subject, focus, etc.) matches the section focus, or the resources have no logical subject (few resources).",
      "comment" : "Typically, sections in a doument are about the subject of the document, whether that is a  patient, or group of patients, location, or device, or whatever. For some kind of documents, some sections actually contain data about related entities. Typical examples are  a section in a newborn discharge summary concerning the mother, or family history documents, with a section about each family member, though there are many other examples.",
      "min" : 0,
      "max" : "1",
      "isModifier" : false,
      "mapping" : [{
        "identity" : "cda",
        "map" : ".subject? (CDA did not differentiate between subject and focus)"
      }]
    },
    {
      "path" : "Extension.extension",
      "max" : "0"
    },
    {
      "path" : "Extension.value[x]",
      "min" : 1,
      "type" : [{
        "code" : "Reference",
        "targetProfile" : ["http://hl7.org/fhir/StructureDefinition/Resource"]
      }]
    },
    {
      "path" : "Extension.url",
      "fixedUri" : "http://hl7.org/fhir/4.0/StructureDefinition/extension-Composition.section.focus"
    }]
  }
}