Cross-Version Extension for Attachment.size in R2

Context of Use

This extension may be used in the following contexts:

• element Attachment (For version R5)
• extension http://hl7.org/fhir/5.0/StructureDefinition/extension-Attachment

Name	Flags	Card.	Type	Description & Constraints
Extension		0..1	Extension	Number of bytes of content (if url provided)
extension		..0
value[x]		1..
url				"http://hl7.org/fhir/1.0/StructureDefinition/extension-Attachment.size"
Documentation for this format

{
  "resourceType" : "StructureDefinition",
  "id" : "xv-r2-att.size",
  "url" : "http://hl7.org/fhir/1.0/StructureDefinition/extension-Attachment.size",
  "name" : "XVerExtensionAttachment.sizeR2",
  "title" : "Cross-Version Extension for Attachment.size in R2",
  "status" : "active",
  "experimental" : false,
  "publisher" : "HL7 FHIR Standard",
  "contact" : [{
    "telecom" : [{
      "system" : "other",
      "value" : "http://hl7.org/fhir"
    }]
  }],
  "description" : "Cross-Version Extension for Attachment.size. Valid in versions R5\r\n\r\nThis is a valid extension because the types unsignedInt were removed in a later version",
  "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" : "5.0"
      },
      {
        "url" : "endFhirVersion",
        "valueCode" : "5.0"
      }],
      "url" : "http://hl7.org/fhir/StructureDefinition/version-specific-use"
    }],
    "type" : "element",
    "expression" : "Attachment"
  },
  {
    "type" : "extension",
    "expression" : "http://hl7.org/fhir/5.0/StructureDefinition/extension-Attachment"
  }],
  "type" : "Extension",
  "baseDefinition" : "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation" : "constraint",
  "differential" : {
    "element" : [{
      "path" : "Extension",
      "short" : "Number of bytes of content (if url provided)",
      "definition" : "The number of bytes of data that make up this attachment.",
      "comment" : "The number of bytes is redundant if the data is provided as a base64binary, but is useful if the data is provided as a url reference.",
      "requirements" : "Representing the size allows applications to determine whether they should fetch the content automatically in advance, or refuse to fetch it at all.",
      "min" : 0,
      "max" : "1",
      "isModifier" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "N/A (needs data type R3 proposal)"
      }]
    },
    {
      "path" : "Extension.extension",
      "max" : "0"
    },
    {
      "path" : "Extension.value[x]",
      "min" : 1
    },
    {
      "path" : "Extension.url",
      "fixedUri" : "http://hl7.org/fhir/1.0/StructureDefinition/extension-Attachment.size"
    }]
  }
}