Cross-Version Extension for SearchParameter.expression in R3

Context of Use

This extension may be used in the following contexts:

• element SearchParameter (For version R2)
• extension http://hl7.org/fhir/1.0/StructureDefinition/extension-SearchParameter

Name	Flags	Card.	Type	Description & Constraints
Extension		0..1	Extension	FHIRPath expression that extracts the values
extension		..0
value[x]		1..	string
url				"http://hl7.org/fhir/3.0/StructureDefinition/extension-SearchParameter.expression"
Documentation for this format

{
  "resourceType" : "StructureDefinition",
  "id" : "xv-r3-spd.expression",
  "url" : "http://hl7.org/fhir/3.0/StructureDefinition/extension-SearchParameter.expression",
  "name" : "XVerExtensionSearchParameter.expressionR3",
  "title" : "Cross-Version Extension for SearchParameter.expression in R3",
  "status" : "active",
  "experimental" : false,
  "publisher" : "Health Level Seven International (FHIR Infrastructure)",
  "contact" : [{
    "telecom" : [{
      "system" : "url",
      "value" : "http://hl7.org/fhir"
    }]
  },
  {
    "telecom" : [{
      "system" : "url",
      "value" : "http://www.hl7.org/Special/committees/fiwg/index.cfm"
    }]
  }],
  "description" : "Cross-Version Extension for SearchParameter.expression. Valid in versions R2\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" : "1.0"
      },
      {
        "url" : "endFhirVersion",
        "valueCode" : "1.0"
      }],
      "url" : "http://hl7.org/fhir/StructureDefinition/version-specific-use"
    }],
    "type" : "element",
    "expression" : "SearchParameter"
  },
  {
    "type" : "extension",
    "expression" : "http://hl7.org/fhir/1.0/StructureDefinition/extension-SearchParameter"
  }],
  "type" : "Extension",
  "baseDefinition" : "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation" : "constraint",
  "differential" : {
    "element" : [{
      "path" : "Extension",
      "short" : "FHIRPath expression that extracts the values",
      "definition" : "A FHIRPath expression that returns a set of elements for the search parameter.",
      "comment" : "Note that the elements returned by the expression are sometimes complex elements where logic is required to determine quite how to handle them; e.g. CodeableConcepts may contain text and/or multiple codings, where the codings themselves contain a code and a system. For composite search parameters, the outcome of the expression must a collection of base elements from which the composites are derived.",
      "min" : 0,
      "max" : "1",
      "isModifier" : false
    },
    {
      "path" : "Extension.extension",
      "max" : "0"
    },
    {
      "path" : "Extension.value[x]",
      "min" : 1,
      "type" : [{
        "code" : "string"
      }]
    },
    {
      "path" : "Extension.url",
      "fixedUri" : "http://hl7.org/fhir/3.0/StructureDefinition/extension-SearchParameter.expression"
    }]
  }
}