{
  "description": "Indicates that the value of the parameter is an empty list. Because the parameter element of a Parameters resource must have a value, the value element must be present with either an actual value, or an extension, this extension supports the case when the actual parameter value being represented is an empty list. The type of the value element used should be appropriate to the element type of the list-valued expression.",
  "_filename": "StructureDefinition-cqf-isEmptyList.json",
  "package_name": "hl7.fhir.uv.cql",
  "date": "2019-02-13",
  "derivation": "constraint",
  "publisher": "HL7 International / Clinical Decision Support",
  "fhirVersion": "4.0.1",
  "jurisdiction": [ {
    "coding": [ {
      "code": "001",
      "system": "http://unstats.un.org/unsd/methods/m49/m49.htm",
      "display": "World"
    } ]
  } ],
  "name": "IsEmptyList",
  "mapping": [ {
    "uri": "http://hl7.org/v3",
    "name": "RIM Mapping",
    "identity": "rim"
  } ],
  "abstract": false,
  "type": "Extension",
  "experimental": "false",
  "resourceType": "StructureDefinition",
  "title": "Is Empty List",
  "package_version": "1.0.0-snapshot",
  "extension": [ {
    "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
    "valueInteger": 1
  }, {
    "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
    "valueCode": "cds"
  }, {
    "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status",
    "valueCode": "trial-use"
  } ],
  "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": "Indicates that the value of the parameter is an empty list. Because the parameter element of a Parameters resource must have a value, the value element must be present with either an actual value, or an extension, this extension supports the case when the actual parameter value being represented is an empty list. The type of the value element used should be appropriate to the element type of the list-valued expression.",
      "isModifier": false,
      "short": "Empty list",
      "max": "1",
      "id": "Extension",
      "condition": [ "ele-1" ],
      "base": {
        "max": "*",
        "min": 0,
        "path": "Extension"
      }
    }, {
      "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": "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.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
    }, {
      "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/StructureDefinition/cqf-isEmptyList",
      "mapping": [ {
        "map": "N/A",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "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": "boolean"
      } ],
      "max": "1",
      "id": "Extension.value[x]",
      "base": {
        "max": "1",
        "min": 0,
        "path": "Extension.value[x]"
      },
      "fixedBoolean": true,
      "isSummary": false
    } ]
  },
  "status": "active",
  "id": "b14db34e-66fd-4442-98aa-5eb51af4ec48",
  "kind": "complex-type",
  "url": "http://hl7.org/fhir/StructureDefinition/cqf-isEmptyList",
  "identifier": [ {
    "value": "urn:oid:2.16.840.1.113883.4.642.40.37.42.5",
    "system": "urn:ietf:rfc:3986"
  } ],
  "context": [ {
    "type": "element",
    "expression": "base64Binary"
  }, {
    "type": "element",
    "expression": "boolean"
  }, {
    "type": "element",
    "expression": "canonical"
  }, {
    "type": "element",
    "expression": "code"
  }, {
    "type": "element",
    "expression": "date"
  }, {
    "type": "element",
    "expression": "dateTime"
  }, {
    "type": "element",
    "expression": "decimal"
  }, {
    "type": "element",
    "expression": "id"
  }, {
    "type": "element",
    "expression": "instant"
  }, {
    "type": "element",
    "expression": "integer"
  }, {
    "type": "element",
    "expression": "markdown"
  }, {
    "type": "element",
    "expression": "oid"
  }, {
    "type": "element",
    "expression": "positiveInt"
  }, {
    "type": "element",
    "expression": "string"
  }, {
    "type": "element",
    "expression": "time"
  }, {
    "type": "element",
    "expression": "unsignedInt"
  }, {
    "type": "element",
    "expression": "uri"
  }, {
    "type": "element",
    "expression": "url"
  }, {
    "type": "element",
    "expression": "uuid"
  }, {
    "type": "element",
    "expression": "Address"
  }, {
    "type": "element",
    "expression": "Age"
  }, {
    "type": "element",
    "expression": "Annotation"
  }, {
    "type": "element",
    "expression": "Attachment"
  }, {
    "type": "element",
    "expression": "CodeableConcept"
  }, {
    "type": "element",
    "expression": "Coding"
  }, {
    "type": "element",
    "expression": "ContactPoint"
  }, {
    "type": "element",
    "expression": "Count"
  }, {
    "type": "element",
    "expression": "Distance"
  }, {
    "type": "element",
    "expression": "Duration"
  }, {
    "type": "element",
    "expression": "HumanName"
  }, {
    "type": "element",
    "expression": "Identifier"
  }, {
    "type": "element",
    "expression": "Money"
  }, {
    "type": "element",
    "expression": "Period"
  }, {
    "type": "element",
    "expression": "Quantity"
  }, {
    "type": "element",
    "expression": "Range"
  }, {
    "type": "element",
    "expression": "Ratio"
  }, {
    "type": "element",
    "expression": "Reference"
  }, {
    "type": "element",
    "expression": "SampledData"
  }, {
    "type": "element",
    "expression": "Signature"
  }, {
    "type": "element",
    "expression": "Timing"
  }, {
    "type": "element",
    "expression": "ContactDetail"
  }, {
    "type": "element",
    "expression": "DataRequirement"
  }, {
    "type": "element",
    "expression": "Expression"
  }, {
    "type": "element",
    "expression": "ParameterDefinition"
  }, {
    "type": "element",
    "expression": "RelatedArtifact"
  }, {
    "type": "element",
    "expression": "TriggerDefinition"
  }, {
    "type": "element",
    "expression": "UsageContext"
  }, {
    "type": "element",
    "expression": "Dosage"
  }, {
    "type": "element",
    "expression": "Meta"
  } ],
  "version": "1.0.0-snapshot",
  "differential": {
    "element": [ {
      "id": "Extension",
      "max": "1",
      "min": 0,
      "path": "Extension",
      "short": "Empty list",
      "definition": "Indicates that the value of the parameter is an empty list. Because the parameter element of a Parameters resource must have a value, the value element must be present with either an actual value, or an extension, this extension supports the case when the actual parameter value being represented is an empty list. The type of the value element used should be appropriate to the element type of the list-valued expression."
    }, {
      "id": "Extension.url",
      "path": "Extension.url",
      "type": [ {
        "code": "uri"
      } ],
      "fixedUri": "http://hl7.org/fhir/StructureDefinition/cqf-isEmptyList"
    }, {
      "id": "Extension.value[x]",
      "path": "Extension.value[x]",
      "type": [ {
        "code": "boolean"
      } ],
      "fixedBoolean": true
    } ]
  },
  "contact": [ {
    "telecom": [ {
      "value": "http://www.hl7.org/Special/committees/dss",
      "system": "url"
    } ]
  } ],
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension"
}