{
  "description" : "Extension to define the population of the group using FHIR REST API parameters. For example, the following extension would limit the population of the group to patients with an ambulatory encounter in January 2024:\\n```\\n\\\"modifierExtension\\\" : [{\\n  \\\"url\\\" : \\\"http://hl7.org/fhir/uv/bulkdata/StructureDefinition/member-filter\\\",\\n  \\\"valueExpression\\\" : {\\n    \\\"language\\\" : \\\"application/x-fhir-query\\\",\\n      \\\"expression\\\": \\\"Encounter?class=http://terminology.hl7.org/CodeSystem/v3-ActCode|AMB&date=ge2024-01-01&date=le2024-01-31\\\"\\n  }\\n}]\\n```",
  "_filename": "StructureDefinition-member-filter.json",
  "package_name": "hl7.fhir.uv.bulkdata",
  "date": "2025-08-04T20:07:54+00:00",
  "derivation": "constraint",
  "publisher": "HL7 International / FHIR Infrastructure",
  "fhirVersion": "4.0.1",
  "jurisdiction": [ {
    "coding": [ {
      "code": "001",
      "system": "http://unstats.un.org/unsd/methods/m49/m49.htm"
    } ]
  } ],
  "name": "MemberFilter",
  "mapping": [ {
    "uri": "http://hl7.org/v3",
    "name": "RIM Mapping",
    "identity": "rim"
  } ],
  "abstract": false,
  "type": "Extension",
  "experimental": null,
  "resourceType": "StructureDefinition",
  "title": "Member Filter",
  "package_version": "3.0.0-ballot",
  "extension": [ {
    "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
    "valueCode": "fhir"
  }, {
    "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
    "valueInteger": 5,
    "_valueInteger": {
      "extension": [ {
        "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom",
        "valueCanonical": "http://hl7.org/fhir/uv/bulkdata/ImplementationGuide/hl7.fhir.uv.bulkdata"
      } ]
    }
  }, {
    "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status",
    "valueCode": "trial-use",
    "_valueCode": {
      "extension": [ {
        "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom",
        "valueCanonical": "http://hl7.org/fhir/uv/bulkdata/ImplementationGuide/hl7.fhir.uv.bulkdata"
      } ]
    }
  } ],
  "snapshot": {
    "element": [ {
      "constraint": [ {
        "key": "ele-1",
        "human": "All FHIR elements must have a @value or children",
        "xpath": "@value|f:*|h:div",
        "source": "http://hl7.org/fhir/StructureDefinition/Element",
        "severity": "error",
        "expression": "hasValue() or (children().count() > id.count())"
      }, {
        "key": "ext-1",
        "human": "Must have either extensions or value[x], not both",
        "xpath": "exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])",
        "source": "http://hl7.org/fhir/StructureDefinition/Extension",
        "severity": "error",
        "expression": "extension.exists() != value.exists()"
      } ],
      "path": "Extension",
      "min": 0,
      "definition" : "Extension to define the population of the group using FHIR REST API parameters. For example, the following extension would limit the population of the group to patients with an ambulatory encounter in January 2024:\n```\n\"modifierExtension\" : [{\n  \"url\" : \"http://hl7.org/fhir/uv/bulkdata/StructureDefinition/member-filter\",\n  \"valueExpression\" : {\n    \"language\" : \"application/x-fhir-query\",\n      \"expression\": \"Encounter?class=http://terminology.hl7.org/CodeSystem/v3-ActCode|AMB&date=ge2024-01-01&date=le2024-01-31\"\n  }\n}]\n```",
      "isModifier": true,
      "short": "Member Filter",
      "max": "*",
      "id": "Extension",
      "condition": [ "ele-1" ],
      "base": {
        "max": "*",
        "min": 0,
        "path": "Extension"
      },
      "isModifierReason": "Filters members of group to a subset"
    }, {
      "path": "Extension.id",
      "min": 0,
      "definition": "Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
      "isModifier": false,
      "short": "Unique id for inter-element referencing",
      "mapping": [ {
        "map": "n/a",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "http://hl7.org/fhirpath/System.String",
        "extension": [ {
          "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
          "valueUrl": "string"
        } ]
      } ],
      "representation": [ "xmlAttr" ],
      "max": "1",
      "id": "Extension.id",
      "base": {
        "max": "1",
        "min": 0,
        "path": "Element.id"
      },
      "isSummary": false
    }, {
      "constraint": [ {
        "key": "ele-1",
        "human": "All FHIR elements must have a @value or children",
        "xpath": "@value|f:*|h:div",
        "source": "http://hl7.org/fhir/StructureDefinition/Element",
        "severity": "error",
        "expression": "hasValue() or (children().count() > id.count())"
      }, {
        "key": "ext-1",
        "human": "Must have either extensions or value[x], not both",
        "xpath": "exists(f:extension)!=exists(f:*[starts-with(local-name(.), \"value\")])",
        "source": "http://hl7.org/fhir/StructureDefinition/Extension",
        "severity": "error",
        "expression": "extension.exists() != value.exists()"
      } ],
      "path": "Extension.extension",
      "min": 0,
      "definition": "An Extension",
      "isModifier": false,
      "short": "Extension",
      "slicing": {
        "rules": "open",
        "description": "Extensions are always sliced by (at least) url",
        "discriminator": [ {
          "path": "url",
          "type": "value"
        } ]
      },
      "type": [ {
        "code": "Extension"
      } ],
      "max": "0",
      "id": "Extension.extension",
      "base": {
        "max": "*",
        "min": 0,
        "path": "Element.extension"
      },
      "isSummary": false
    }, {
      "path": "Extension.url",
      "min": 1,
      "definition": "Source of the definition for the extension code - a logical name or a URL.",
      "isModifier": false,
      "short": "identifies the meaning of the extension",
      "fixedUri": "http://hl7.org/fhir/uv/bulkdata/StructureDefinition/member-filter",
      "mapping": [ {
        "map": "N/A",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "http://hl7.org/fhirpath/System.String",
        "extension": [ {
          "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
          "valueUrl": "uri"
        } ]
      } ],
      "representation": [ "xmlAttr" ],
      "max": "1",
      "id": "Extension.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.",
      "base": {
        "max": "1",
        "min": 1,
        "path": "Extension.url"
      },
      "isSummary": false
    }, {
      "constraint": [ {
        "key": "ele-1",
        "human": "All FHIR elements must have a @value or children",
        "xpath": "@value|f:*|h:div",
        "source": "http://hl7.org/fhir/StructureDefinition/Element",
        "severity": "error",
        "expression": "hasValue() or (children().count() > id.count())"
      } ],
      "path": "Extension.value[x]",
      "min": 0,
      "definition": "Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/R4/extensibility.html) for a list).",
      "isModifier": false,
      "short": "Value of extension",
      "mapping": [ {
        "map": "N/A",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "Expression"
      } ],
      "max": "1",
      "id": "Extension.value[x]",
      "base": {
        "max": "1",
        "min": 0,
        "path": "Extension.value[x]"
      },
      "isSummary": false
    }, {
      "path": "Extension.value[x].id",
      "min": 0,
      "definition": "Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
      "isModifier": false,
      "short": "Unique id for inter-element referencing",
      "mapping": [ {
        "map": "n/a",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "http://hl7.org/fhirpath/System.String",
        "extension": [ {
          "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
          "valueUrl": "string"
        } ]
      } ],
      "representation": [ "xmlAttr" ],
      "max": "1",
      "id": "Extension.value[x].id",
      "base": {
        "max": "1",
        "min": 0,
        "path": "Element.id"
      },
      "isSummary": false
    }, {
      "constraint": [ {
        "key": "ele-1",
        "human": "All FHIR elements must have a @value or children",
        "xpath": "@value|f:*|h:div",
        "source": "http://hl7.org/fhir/StructureDefinition/Element",
        "severity": "error",
        "expression": "hasValue() or (children().count() > id.count())"
      }, {
        "key": "ext-1",
        "human": "Must have either extensions or value[x], not both",
        "xpath": "exists(f:extension)!=exists(f:*[starts-with(local-name(.), \"value\")])",
        "source": "http://hl7.org/fhir/StructureDefinition/Extension",
        "severity": "error",
        "expression": "extension.exists() != value.exists()"
      } ],
      "path": "Extension.value[x].extension",
      "min": 0,
      "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.",
      "isModifier": false,
      "short": "Additional content defined by implementations",
      "mapping": [ {
        "map": "n/a",
        "identity": "rim"
      } ],
      "slicing": {
        "rules": "open",
        "description": "Extensions are always sliced by (at least) url",
        "discriminator": [ {
          "path": "url",
          "type": "value"
        } ]
      },
      "type": [ {
        "code": "Extension"
      } ],
      "alias": [ "extensions", "user content" ],
      "max": "*",
      "id": "Extension.value[x].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.",
      "base": {
        "max": "*",
        "min": 0,
        "path": "Element.extension"
      },
      "isSummary": false
    }, {
      "constraint": [ {
        "key": "ele-1",
        "human": "All FHIR elements must have a @value or children",
        "xpath": "@value|f:*|h:div",
        "source": "http://hl7.org/fhir/StructureDefinition/Element",
        "severity": "error",
        "expression": "hasValue() or (children().count() > id.count())"
      } ],
      "path": "Extension.value[x].description",
      "min": 0,
      "definition": "A brief, natural language description of the condition that effectively communicates the intended semantics.",
      "isModifier": false,
      "short": "Natural language description of the condition",
      "type": [ {
        "code": "string"
      } ],
      "max": "1",
      "id": "Extension.value[x].description",
      "base": {
        "max": "1",
        "min": 0,
        "path": "Expression.description"
      },
      "isSummary": true
    }, {
      "constraint": [ {
        "key": "ele-1",
        "human": "All FHIR elements must have a @value or children",
        "xpath": "@value|f:*|h:div",
        "source": "http://hl7.org/fhir/StructureDefinition/Element",
        "severity": "error",
        "expression": "hasValue() or (children().count() > id.count())"
      } ],
      "path": "Extension.value[x].name",
      "min": 0,
      "definition": "A short name assigned to the expression to allow for multiple reuse of the expression in the context where it is defined.",
      "isModifier": false,
      "short": "Short name assigned to expression for reuse",
      "type": [ {
        "code": "id"
      } ],
      "max": "1",
      "id": "Extension.value[x].name",
      "base": {
        "max": "1",
        "min": 0,
        "path": "Expression.name"
      },
      "isSummary": true
    }, {
      "constraint": [ {
        "key": "ele-1",
        "human": "All FHIR elements must have a @value or children",
        "xpath": "@value|f:*|h:div",
        "source": "http://hl7.org/fhir/StructureDefinition/Element",
        "severity": "error",
        "expression": "hasValue() or (children().count() > id.count())"
      } ],
      "path": "Extension.value[x].language",
      "min": 1,
      "definition": "The media type of the language for the expression.",
      "isModifier": false,
      "short": "text/cql | text/fhirpath | application/x-fhir-query | etc.",
      "type": [ {
        "code": "code"
      } ],
      "patternCode": "application/x-fhir-query",
      "binding": {
        "strength": "extensible",
        "valueSet": "http://hl7.org/fhir/ValueSet/expression-language",
        "extension": [ {
          "url": "http://hl7.org/fhir/StructureDefinition/elementdefinition-maxValueSet",
          "valueCanonical": "http://www.rfc-editor.org/bcp/bcp13.txt"
        }, {
          "url": "http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName",
          "valueString": "ExpressionLanguage"
        } ],
        "description": "The media type of the expression language."
      },
      "max": "1",
      "id": "Extension.value[x].language",
      "base": {
        "max": "1",
        "min": 1,
        "path": "Expression.language"
      },
      "isSummary": true
    }, {
      "constraint": [ {
        "key": "ele-1",
        "human": "All FHIR elements must have a @value or children",
        "xpath": "@value|f:*|h:div",
        "source": "http://hl7.org/fhir/StructureDefinition/Element",
        "severity": "error",
        "expression": "hasValue() or (children().count() > id.count())"
      } ],
      "path": "Extension.value[x].expression",
      "min": 0,
      "definition": "An expression in the specified language that returns a value.",
      "isModifier": false,
      "short": "Expression in specified language",
      "type": [ {
        "code": "string"
      } ],
      "max": "1",
      "id": "Extension.value[x].expression",
      "base": {
        "max": "1",
        "min": 0,
        "path": "Expression.expression"
      },
      "isSummary": true
    }, {
      "constraint": [ {
        "key": "ele-1",
        "human": "All FHIR elements must have a @value or children",
        "xpath": "@value|f:*|h:div",
        "source": "http://hl7.org/fhir/StructureDefinition/Element",
        "severity": "error",
        "expression": "hasValue() or (children().count() > id.count())"
      } ],
      "path": "Extension.value[x].reference",
      "min": 0,
      "definition": "A URI that defines where the expression is found.",
      "isModifier": false,
      "short": "Where the expression is found",
      "type": [ {
        "code": "uri"
      } ],
      "max": "1",
      "id": "Extension.value[x].reference",
      "comment": "If both a reference and an expression is found, the reference SHALL point to the same expression.",
      "base": {
        "max": "1",
        "min": 0,
        "path": "Expression.reference"
      },
      "isSummary": true
    } ],
    "extension": [ {
      "url": "http://hl7.org/fhir/tools/StructureDefinition/snapshot-base-version",
      "valueString": "4.0.1"
    } ]
  },
  "status": "active",
  "id": "a6ac9e3a-0e41-430d-9748-1a6c96f72103",
  "kind": "complex-type",
  "url": "http://hl7.org/fhir/uv/bulkdata/StructureDefinition/member-filter",
  "context": [ {
    "type": "element",
    "expression": "Group"
  } ],
  "version": "3.0.0-ballot",
  "differential": {
    "element": [ {
      "id": "Extension",
      "path": "Extension",
      "short": "Member Filter",
      "definition" : "Extension to define the population of the group using FHIR REST API parameters. For example, the following extension would limit the population of the group to patients with an ambulatory encounter in January 2024:\n```\n\"modifierExtension\" : [{\n  \"url\" : \"http://hl7.org/fhir/uv/bulkdata/StructureDefinition/member-filter\",\n  \"valueExpression\" : {\n    \"language\" : \"application/x-fhir-query\",\n      \"expression\": \"Encounter?class=http://terminology.hl7.org/CodeSystem/v3-ActCode|AMB&date=ge2024-01-01&date=le2024-01-31\"\n  }\n}]\n```",
      "isModifier": true,
      "isModifierReason": "Filters members of group to a subset"
    }, {
      "id": "Extension.extension",
      "max": "0",
      "path": "Extension.extension"
    }, {
      "id": "Extension.url",
      "path": "Extension.url",
      "fixedUri": "http://hl7.org/fhir/uv/bulkdata/StructureDefinition/member-filter"
    }, {
      "id": "Extension.value[x]",
      "path": "Extension.value[x]",
      "type": [ {
        "code": "Expression"
      } ]
    }, {
      "id": "Extension.value[x].language",
      "path": "Extension.value[x].language",
      "patternCode": "application/x-fhir-query"
    } ]
  },
  "contact": [ {
    "name": "HL7 International / FHIR Infrastructure",
    "telecom": [ {
      "value": "http://www.hl7.org/Special/committees/fiwg",
      "system": "url"
    }, {
      "value": "fhir@lists.HL7.org",
      "system": "email"
    } ]
  } ],
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension"
}