<?xml version="1.0" encoding="UTF-8"?>
<!-- 
 * #%L
 * org.hl7.fhir.r5
 * %%
 * Copyright (C) 2014 - 2019 Health Level 7
 * %%
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 * limitations under the License.
 * #L%
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/*
  Copyright (c) 2011+, HL7, Inc.
  All rights reserved.
  
  Redistribution and use in source and binary forms, with or without modification, 
  are permitted provided that the following conditions are met:
  
   * Redistributions of source code must retain the above copyright notice, this 
     list of conditions and the following disclaimer.
   * Redistributions in binary form must reproduce the above copyright notice, 
     this list of conditions and the following disclaimer in the documentation 
     and/or other materials provided with the distribution.
   * Neither the name of HL7 nor the names of its contributors may be used to 
     endorse or promote products derived from this software without specific 
     prior written permission.
  
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 
  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
  IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
  POSSIBILITY OF SUCH DAMAGE.
  

  Generated on Tue, May 19, 2026 20:26+0000 for FHIR v6.0.0-ballot4 

  Note: the schemas &amp; schematrons do not contain all of the rules about what makes resources
  valid. Implementers will still need to be familiar with the content of the specification and with
  any profiles that apply to the resources in order to make a conformant implementation.

-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns="http://hl7.org/fhir" xmlns:xhtml="http://www.w3.org/1999/xhtml" targetNamespace="http://hl7.org/fhir" elementFormDefault="qualified" version="1.0">
  <xs:include schemaLocation="fhir-base.xsd"/>
  <xs:element name="Task" type="Task">
    <xs:annotation>
      <xs:documentation xml:lang="en">A task to be performed as a part of a workflow and the related informations like inputs, outputs and execution progress. While very simple workflows can be implemented with [[[Request]]] alone, most workflows would require a Task (explicit or contained) as a means to track the execution progress (i.e. inputs, outputs, status). Please refer to [Fulfillment/Execution](request.html#fulfillment).</xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name="Task">
    <xs:annotation>
      <xs:documentation xml:lang="en">A task to be performed as a part of a workflow and the related informations like inputs, outputs and execution progress. While very simple workflows can be implemented with [[[Request]]] alone, most workflows would require a Task (explicit or contained) as a means to track the execution progress (i.e. inputs, outputs, status). Please refer to [Fulfillment/Execution](request.html#fulfillment).</xs:documentation>
      <xs:documentation xml:lang="en">If the element is present, it must have either a @value, an @id, or extensions</xs:documentation>
    </xs:annotation>
    <xs:complexContent>
      <xs:extension base="DomainResource">
        <xs:sequence>
          <xs:element name="identifier" minOccurs="0" maxOccurs="unbounded" type="Identifier">
            <xs:annotation>
              <xs:documentation xml:lang="en">The business identifier for this task.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="basedOn" minOccurs="0" maxOccurs="unbounded" type="Reference">
            <xs:annotation>
              <xs:documentation xml:lang="en">BasedOn refers to a higher-level authorization that triggered the creation of the task.  It references a &quot;request&quot; resource such as a ServiceRequest, MedicationRequest, CarePlan, etc. which is distinct from the &quot;request&quot; resource the task is seeking to fulfill.  This latter resource is referenced by focus.  For example, based on a CarePlan (= basedOn), a task is created to fulfill a ServiceRequest ( = focus ) to collect a specimen from a patient.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="groupIdentifier" minOccurs="0" maxOccurs="1" type="Identifier">
            <xs:annotation>
              <xs:documentation xml:lang="en">A shared identifier common to multiple independent Task and Request instances that were activated/authorized more or less simultaneously by a single author.  The presence of the same identifier on each request ties those requests together and may have business ramifications in terms of reporting of results, billing, etc.  E.g. a requisition number shared by a set of lab tests ordered together, or a prescription number shared by all meds ordered at one time.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="partOf" minOccurs="0" maxOccurs="unbounded" type="Reference">
            <xs:annotation>
              <xs:documentation xml:lang="en">Task that this particular task is part of.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="status" minOccurs="1" maxOccurs="1" type="TaskStatus">
            <xs:annotation>
              <xs:documentation xml:lang="en">The current status of the task.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="statusReason" minOccurs="0" maxOccurs="unbounded" type="CodeableReference">
            <xs:annotation>
              <xs:documentation xml:lang="en">An explanation as to why this task is held, failed, was refused, etc.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="businessStatus" minOccurs="0" maxOccurs="1" type="CodeableConcept">
            <xs:annotation>
              <xs:documentation xml:lang="en">Contains business-specific nuances of the business state.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="intent" minOccurs="1" maxOccurs="1" type="TaskIntent">
            <xs:annotation>
              <xs:documentation xml:lang="en">Indicates the &quot;level&quot; of actionability associated with the Task, i.e. this a proposed task, a planned task, an actionable task, etc.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="priority" minOccurs="0" maxOccurs="1" type="RequestPriority">
            <xs:annotation>
              <xs:documentation xml:lang="en">Indicates how quickly the Task should be addressed with respect to other requests.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="doNotPerform" minOccurs="0" maxOccurs="1" type="boolean">
            <xs:annotation>
              <xs:documentation xml:lang="en">If true indicates that the Task is asking for the specified action to *not* occur.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="code" minOccurs="0" maxOccurs="1" type="CodeableConcept">
            <xs:annotation>
              <xs:documentation xml:lang="en">A name or code (or both) briefly describing what the task involves.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="description" minOccurs="0" maxOccurs="1" type="markdown">
            <xs:annotation>
              <xs:documentation xml:lang="en">A free-text description of what is to be performed.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="focus" type="Task.Focus" minOccurs="0" maxOccurs="unbounded">
            <xs:annotation>
              <xs:documentation xml:lang="en">The request being fulfilled or the resource being manipulated (changed, suspended, etc.) by this task.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="for" minOccurs="0" maxOccurs="1" type="Reference">
            <xs:annotation>
              <xs:documentation xml:lang="en">The entity who benefits from the performance of the service specified in the task (e.g., the patient).</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="encounter" minOccurs="0" maxOccurs="1" type="Reference">
            <xs:annotation>
              <xs:documentation xml:lang="en">The healthcare event  (e.g. a patient and healthcare provider interaction) during which this task was created.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="requestedPeriod" minOccurs="0" maxOccurs="1" type="Period">
            <xs:annotation>
              <xs:documentation xml:lang="en">Indicates the start and/or end of the period of time when completion of the task is desired to take place.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="executionPeriod" minOccurs="0" maxOccurs="1" type="Period">
            <xs:annotation>
              <xs:documentation xml:lang="en">Identifies the time action was first taken against the task (start) and/or the time final action was taken against the task prior to marking it as completed (end).</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="authoredOn" minOccurs="0" maxOccurs="1" type="dateTime">
            <xs:annotation>
              <xs:documentation xml:lang="en">The date and time this task was created.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="lastModified" minOccurs="0" maxOccurs="1" type="dateTime">
            <xs:annotation>
              <xs:documentation xml:lang="en">The date and time of last modification to this task.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="requester" minOccurs="0" maxOccurs="1" type="Reference">
            <xs:annotation>
              <xs:documentation xml:lang="en">The creator of the task.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="requestedPerformer" minOccurs="0" maxOccurs="unbounded" type="CodeableReference">
            <xs:annotation>
              <xs:documentation xml:lang="en">The kind of participant or specific participant that should perform the task.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="owner" minOccurs="0" maxOccurs="1" type="Reference">
            <xs:annotation>
              <xs:documentation xml:lang="en">Party responsible for managing task execution.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="performer" type="Task.Performer" minOccurs="0" maxOccurs="unbounded">
            <xs:annotation>
              <xs:documentation xml:lang="en">The entity who performed the requested task.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="location" minOccurs="0" maxOccurs="1" type="Reference">
            <xs:annotation>
              <xs:documentation xml:lang="en">Principal physical location where this task is performed.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="reason" minOccurs="0" maxOccurs="unbounded" type="CodeableReference">
            <xs:annotation>
              <xs:documentation xml:lang="en">A description, code, or reference indicating why this task needs to be performed.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="insurance" minOccurs="0" maxOccurs="unbounded" type="Reference">
            <xs:annotation>
              <xs:documentation xml:lang="en">Insurance plans, coverage extensions, pre-authorizations and/or pre-determinations that may be relevant to the Task.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="note" minOccurs="0" maxOccurs="unbounded" type="Annotation">
            <xs:annotation>
              <xs:documentation xml:lang="en">Free-text information about the task during its lifecycle.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="relevantHistory" minOccurs="0" maxOccurs="unbounded" type="Reference">
            <xs:annotation>
              <xs:documentation xml:lang="en">Links to Provenance records for past versions of this Task that identify key state transitions or updates that are likely to be relevant to a user looking at the current version of the task.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="restriction" type="Task.Restriction" minOccurs="0" maxOccurs="1">
            <xs:annotation>
              <xs:documentation xml:lang="en">If the Task.focus is a request resource and the task is seeking fulfillment (i.e. is asking for the request to be actioned), this element identifies any limitations on what parts of the referenced request should be actioned.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="input" type="Task.Input" minOccurs="0" maxOccurs="unbounded">
            <xs:annotation>
              <xs:documentation xml:lang="en">Additional information that may be needed in the execution of the task.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="output" type="Task.Output" minOccurs="0" maxOccurs="unbounded">
            <xs:annotation>
              <xs:documentation xml:lang="en">Outputs produced by the Task.</xs:documentation>
           </xs:annotation>
          </xs:element>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:complexType name="Task.Focus">
    <xs:annotation>
      <xs:documentation xml:lang="en">A task to be performed as a part of a workflow and the related informations like inputs, outputs and execution progress. While very simple workflows can be implemented with [[[Request]]] alone, most workflows would require a Task (explicit or contained) as a means to track the execution progress (i.e. inputs, outputs, status). Please refer to [Fulfillment/Execution](request.html#fulfillment).</xs:documentation>
    </xs:annotation>
    <xs:complexContent>
      <xs:extension base="BackboneElement">
        <xs:sequence>
          <xs:choice minOccurs="1" maxOccurs="1" >
            <xs:annotation>
              <xs:documentation xml:lang="en">What task is acting on.</xs:documentation>
            </xs:annotation>
            <xs:element name="valueReference" type="Reference"/>
            <xs:element name="valueCanonical" type="canonical"/>
          </xs:choice>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:complexType name="Task.Performer">
    <xs:annotation>
      <xs:documentation xml:lang="en">A task to be performed as a part of a workflow and the related informations like inputs, outputs and execution progress. While very simple workflows can be implemented with [[[Request]]] alone, most workflows would require a Task (explicit or contained) as a means to track the execution progress (i.e. inputs, outputs, status). Please refer to [Fulfillment/Execution](request.html#fulfillment).</xs:documentation>
    </xs:annotation>
    <xs:complexContent>
      <xs:extension base="BackboneElement">
        <xs:sequence>
          <xs:element name="function" minOccurs="0" maxOccurs="1" type="CodeableConcept">
            <xs:annotation>
              <xs:documentation xml:lang="en">A code or description of the performer of the task.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="actor" minOccurs="1" maxOccurs="1" type="Reference">
            <xs:annotation>
              <xs:documentation xml:lang="en">The actor or entity who performed the task.</xs:documentation>
           </xs:annotation>
          </xs:element>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:complexType name="Task.Restriction">
    <xs:annotation>
      <xs:documentation xml:lang="en">A task to be performed as a part of a workflow and the related informations like inputs, outputs and execution progress. While very simple workflows can be implemented with [[[Request]]] alone, most workflows would require a Task (explicit or contained) as a means to track the execution progress (i.e. inputs, outputs, status). Please refer to [Fulfillment/Execution](request.html#fulfillment).</xs:documentation>
    </xs:annotation>
    <xs:complexContent>
      <xs:extension base="BackboneElement">
        <xs:sequence>
          <xs:element name="repetitions" minOccurs="0" maxOccurs="1" type="positiveInt">
            <xs:annotation>
              <xs:documentation xml:lang="en">Indicates the number of times the requested action should occur.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="period" minOccurs="0" maxOccurs="1" type="Period">
            <xs:annotation>
              <xs:documentation xml:lang="en">The time-period for which fulfillment is sought. This must fall within the overall time period authorized in the referenced request.  E.g. ServiceRequest.occurance[x].</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="recipient" minOccurs="0" maxOccurs="unbounded" type="Reference">
            <xs:annotation>
              <xs:documentation xml:lang="en">For requests directed at multiple potential recipients or targets, this is used to specify the individual or entity from whom fulfillment is being sought.</xs:documentation>
           </xs:annotation>
          </xs:element>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:complexType name="Task.Input">
    <xs:annotation>
      <xs:documentation xml:lang="en">A task to be performed as a part of a workflow and the related informations like inputs, outputs and execution progress. While very simple workflows can be implemented with [[[Request]]] alone, most workflows would require a Task (explicit or contained) as a means to track the execution progress (i.e. inputs, outputs, status). Please refer to [Fulfillment/Execution](request.html#fulfillment).</xs:documentation>
    </xs:annotation>
    <xs:complexContent>
      <xs:extension base="BackboneElement">
        <xs:sequence>
          <xs:element name="type" minOccurs="1" maxOccurs="1" type="CodeableConcept">
            <xs:annotation>
              <xs:documentation xml:lang="en">A code or description to distinguish between inputs.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:choice minOccurs="1" maxOccurs="1" >
            <xs:annotation>
              <xs:documentation xml:lang="en">The value of the input parameter as a basic type.</xs:documentation>
            </xs:annotation>
            <xs:element name="valueBase64Binary" type="base64Binary"/>
            <xs:element name="valueBoolean" type="boolean"/>
            <xs:element name="valueCanonical" type="canonical"/>
            <xs:element name="valueCode" type="code"/>
            <xs:element name="valueDate" type="date"/>
            <xs:element name="valueDateTime" type="dateTime"/>
            <xs:element name="valueDecimal" type="decimal"/>
            <xs:element name="valueId" type="id"/>
            <xs:element name="valueInstant" type="instant"/>
            <xs:element name="valueInteger" type="integer"/>
            <xs:element name="valueInteger64" type="integer64"/>
            <xs:element name="valueMarkdown" type="markdown"/>
            <xs:element name="valueOid" type="oid"/>
            <xs:element name="valuePositiveInt" type="positiveInt"/>
            <xs:element name="valueString" type="string"/>
            <xs:element name="valueTime" type="time"/>
            <xs:element name="valueUnsignedInt" type="unsignedInt"/>
            <xs:element name="valueUri" type="uri"/>
            <xs:element name="valueUrl" type="url"/>
            <xs:element name="valueUuid" type="uuid"/>
            <xs:element name="valueAddress" type="Address"/>
            <xs:element name="valueAge" type="Age"/>
            <xs:element name="valueAnnotation" type="Annotation"/>
            <xs:element name="valueAttachment" type="Attachment"/>
            <xs:element name="valueCodeableConcept" type="CodeableConcept"/>
            <xs:element name="valueCodeableReference" type="CodeableReference"/>
            <xs:element name="valueCoding" type="Coding"/>
            <xs:element name="valueContactPoint" type="ContactPoint"/>
            <xs:element name="valueCount" type="Count"/>
            <xs:element name="valueDistance" type="Distance"/>
            <xs:element name="valueDuration" type="Duration"/>
            <xs:element name="valueHumanName" type="HumanName"/>
            <xs:element name="valueIdentifier" type="Identifier"/>
            <xs:element name="valueMoney" type="Money"/>
            <xs:element name="valuePeriod" type="Period"/>
            <xs:element name="valueQuantity" type="Quantity"/>
            <xs:element name="valueRange" type="Range"/>
            <xs:element name="valueRatio" type="Ratio"/>
            <xs:element name="valueRatioRange" type="RatioRange"/>
            <xs:element name="valueReference" type="Reference"/>
            <xs:element name="valueSampledData" type="SampledData"/>
            <xs:element name="valueSignature" type="Signature"/>
            <xs:element name="valueTiming" type="Timing"/>
            <xs:element name="valueContactDetail" type="ContactDetail"/>
            <xs:element name="valueDataRequirement" type="DataRequirement"/>
            <xs:element name="valueExpression" type="Expression"/>
            <xs:element name="valueParameterDefinition" type="ParameterDefinition"/>
            <xs:element name="valueRelatedArtifact" type="RelatedArtifact"/>
            <xs:element name="valueTriggerDefinition" type="TriggerDefinition"/>
            <xs:element name="valueUsageContext" type="UsageContext"/>
            <xs:element name="valueAvailability" type="Availability"/>
            <xs:element name="valueExtendedContactDetail" type="ExtendedContactDetail"/>
            <xs:element name="valueVirtualServiceDetail" type="VirtualServiceDetail"/>
            <xs:element name="valueDosage" type="Dosage"/>
            <xs:element name="valueMeta" type="Meta"/>
          </xs:choice>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:complexType name="Task.Output">
    <xs:annotation>
      <xs:documentation xml:lang="en">A task to be performed as a part of a workflow and the related informations like inputs, outputs and execution progress. While very simple workflows can be implemented with [[[Request]]] alone, most workflows would require a Task (explicit or contained) as a means to track the execution progress (i.e. inputs, outputs, status). Please refer to [Fulfillment/Execution](request.html#fulfillment).</xs:documentation>
    </xs:annotation>
    <xs:complexContent>
      <xs:extension base="BackboneElement">
        <xs:sequence>
          <xs:element name="type" minOccurs="1" maxOccurs="1" type="CodeableConcept">
            <xs:annotation>
              <xs:documentation xml:lang="en">A code or description to distinguish between outputs.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:choice minOccurs="1" maxOccurs="1" >
            <xs:annotation>
              <xs:documentation xml:lang="en">The value of the Output parameter as a basic type.</xs:documentation>
            </xs:annotation>
            <xs:element name="valueBase64Binary" type="base64Binary"/>
            <xs:element name="valueBoolean" type="boolean"/>
            <xs:element name="valueCanonical" type="canonical"/>
            <xs:element name="valueCode" type="code"/>
            <xs:element name="valueDate" type="date"/>
            <xs:element name="valueDateTime" type="dateTime"/>
            <xs:element name="valueDecimal" type="decimal"/>
            <xs:element name="valueId" type="id"/>
            <xs:element name="valueInstant" type="instant"/>
            <xs:element name="valueInteger" type="integer"/>
            <xs:element name="valueInteger64" type="integer64"/>
            <xs:element name="valueMarkdown" type="markdown"/>
            <xs:element name="valueOid" type="oid"/>
            <xs:element name="valuePositiveInt" type="positiveInt"/>
            <xs:element name="valueString" type="string"/>
            <xs:element name="valueTime" type="time"/>
            <xs:element name="valueUnsignedInt" type="unsignedInt"/>
            <xs:element name="valueUri" type="uri"/>
            <xs:element name="valueUrl" type="url"/>
            <xs:element name="valueUuid" type="uuid"/>
            <xs:element name="valueAddress" type="Address"/>
            <xs:element name="valueAge" type="Age"/>
            <xs:element name="valueAnnotation" type="Annotation"/>
            <xs:element name="valueAttachment" type="Attachment"/>
            <xs:element name="valueCodeableConcept" type="CodeableConcept"/>
            <xs:element name="valueCodeableReference" type="CodeableReference"/>
            <xs:element name="valueCoding" type="Coding"/>
            <xs:element name="valueContactPoint" type="ContactPoint"/>
            <xs:element name="valueCount" type="Count"/>
            <xs:element name="valueDistance" type="Distance"/>
            <xs:element name="valueDuration" type="Duration"/>
            <xs:element name="valueHumanName" type="HumanName"/>
            <xs:element name="valueIdentifier" type="Identifier"/>
            <xs:element name="valueMoney" type="Money"/>
            <xs:element name="valuePeriod" type="Period"/>
            <xs:element name="valueQuantity" type="Quantity"/>
            <xs:element name="valueRange" type="Range"/>
            <xs:element name="valueRatio" type="Ratio"/>
            <xs:element name="valueRatioRange" type="RatioRange"/>
            <xs:element name="valueReference" type="Reference"/>
            <xs:element name="valueSampledData" type="SampledData"/>
            <xs:element name="valueSignature" type="Signature"/>
            <xs:element name="valueTiming" type="Timing"/>
            <xs:element name="valueContactDetail" type="ContactDetail"/>
            <xs:element name="valueDataRequirement" type="DataRequirement"/>
            <xs:element name="valueExpression" type="Expression"/>
            <xs:element name="valueParameterDefinition" type="ParameterDefinition"/>
            <xs:element name="valueRelatedArtifact" type="RelatedArtifact"/>
            <xs:element name="valueTriggerDefinition" type="TriggerDefinition"/>
            <xs:element name="valueUsageContext" type="UsageContext"/>
            <xs:element name="valueAvailability" type="Availability"/>
            <xs:element name="valueExtendedContactDetail" type="ExtendedContactDetail"/>
            <xs:element name="valueVirtualServiceDetail" type="VirtualServiceDetail"/>
            <xs:element name="valueDosage" type="Dosage"/>
            <xs:element name="valueMeta" type="Meta"/>
          </xs:choice>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:simpleType name="TaskStatusEnum">
    <xs:restriction base="code-primitive">
      <xs:enumeration value="draft">
        <xs:annotation>
          <xs:documentation xml:lang="en">Draft</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="requested">
        <xs:annotation>
          <xs:documentation xml:lang="en">Requested</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="received">
        <xs:annotation>
          <xs:documentation xml:lang="en">Received</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="accepted">
        <xs:annotation>
          <xs:documentation xml:lang="en">Accepted</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="rejected">
        <xs:annotation>
          <xs:documentation xml:lang="en">Rejected</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="ready">
        <xs:annotation>
          <xs:documentation xml:lang="en">Ready</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="cancelled">
        <xs:annotation>
          <xs:documentation xml:lang="en">Cancelled</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="in-progress">
        <xs:annotation>
          <xs:documentation xml:lang="en">In Progress</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="on-hold">
        <xs:annotation>
          <xs:documentation xml:lang="en">On Hold</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="failed">
        <xs:annotation>
          <xs:documentation xml:lang="en">Failed</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="completed">
        <xs:annotation>
          <xs:documentation xml:lang="en">Completed</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="entered-in-error">
        <xs:annotation>
          <xs:documentation xml:lang="en">Entered in Error</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="unknown">
        <xs:annotation>
          <xs:documentation xml:lang="en">Unknown</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name="TaskStatus">
    <xs:annotation>
      <xs:documentation xml:lang="en"></xs:documentation>
      <xs:documentation xml:lang="en">If the element is present, it must have either a @value, an @id, or extensions</xs:documentation>
    </xs:annotation>
    <xs:complexContent>
      <xs:extension base="Element">
        <xs:attribute name="value" type="TaskStatusEnum" use="optional"/>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:simpleType name="TaskIntentEnum">
    <xs:restriction base="code-primitive">
      <xs:enumeration value="unknown">
        <xs:annotation>
          <xs:documentation xml:lang="en">Unknown</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="proposal">
        <xs:annotation>
          <xs:documentation xml:lang="en">Proposal</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="plan">
        <xs:annotation>
          <xs:documentation xml:lang="en">Plan</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="order">
        <xs:annotation>
          <xs:documentation xml:lang="en">Order</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="original-order">
        <xs:annotation>
          <xs:documentation xml:lang="en">Original Order</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="reflex-order">
        <xs:annotation>
          <xs:documentation xml:lang="en">Reflex Order</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="filler-order">
        <xs:annotation>
          <xs:documentation xml:lang="en">Filler Order</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="instance-order">
        <xs:annotation>
          <xs:documentation xml:lang="en">Instance Order</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="option">
        <xs:annotation>
          <xs:documentation xml:lang="en">Option</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name="TaskIntent">
    <xs:annotation>
      <xs:documentation xml:lang="en"></xs:documentation>
      <xs:documentation xml:lang="en">If the element is present, it must have either a @value, an @id, or extensions</xs:documentation>
    </xs:annotation>
    <xs:complexContent>
      <xs:extension base="Element">
        <xs:attribute name="value" type="TaskIntentEnum" use="optional"/>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
</xs:schema>
