FHIR Release 3 (STU)

This page is part of the FHIR Specification (v3.0.2: STU 3). The current version which supercedes this version is 5.0.0. For a full list of available versions, see the Directory of published versions . Page versions: R5 R4B R4 R3 R2

Timing.profile.xml

Modeling and Methodology Work GroupMaturity Level: N/ABallot Status: Informative

Raw XML (canonical form)

StructureDefinition for Timing

<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="Timing"/> 
  <text> 
    <status value="generated"/> 
    <div xmlns="http://www.w3.org/1999/xhtml">
      <table border="0" cellpadding="0" cellspacing="0" style="border: 0px #F0F0F0 solid; font-size: 11px; font-family: verdana; vertical-align: top;">
        <tr style="border: 1px #F0F0F0 solid; font-size: 11px; font-family: verdana; vertical-align: top;">
          <th class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <a href="formats.html#table" title="The logical name of the element">Name</a> 
          </th> 
          <th class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <a href="formats.html#table" title="Information about the use of the element">Flags</a> 
          </th> 
          <th class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <a href="formats.html#table" title="Minimum and Maximum # of times the the element can appear in the instance">Card.</a> 
          </th> 
          <th class="hierarchy" style="width: 100px">
            <a href="formats.html#table" title="Reference to the type of the element">Type</a> 
          </th> 
          <th class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <a href="formats.html#table" title="Additional information about the element">Description &amp; Constraints</a> 
            <span style="float: right">
              <a href="formats.html#table" title="Legend for this format">
                <img alt="doco" src="help16.png" style="background-color: inherit"/> 
              </a> 
            </span> 
          </th> 
        </tr> 
        <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white;">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
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            FEhIdcAYJdYASFRUQhQkLCwkOFwcdEBAXhVabE52ecDahKy0oIQA7" style="background-color: white; background-color: inherit" title="Element"/>  
            <a href="datatypes-definitions.html#Timing" title="Timing : Specifies an event that may occur multiple times. Timing schedules are used to
             record when things are planned, expected or requested to occur. The most common usage
             is in dosage instructions for medications. They are also used when planning care of various
             kinds, and may be used for reporting the schedule to which past regular activities were
             carried out.">Timing</a> 
            <a name="Timing"> </a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <span style="padding: 3px" title="This element is included in summaries">Σ</span> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px"/> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <a href="element.html">Element</a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">A timing schedule that specifies an event that may occur multiple times
            <br/>  Elements defined in Ancestors: 
            <a href="element.html#Element" title="unique id for the element within a resource (for internal references). This may be any
             string value that does not contain spaces.">id</a> , 
            <a href="element.html#Element" title="May be used to represent additional information that is not part of the basic definition
             of the element. In order 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 is allowed to define an extension, there is a set of requirements that SHALL
             be met as part of the definition of the extension.">extension</a> 
          </td> 
        </tr> 

        <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white;">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
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            <a href="datatypes-definitions.html#Timing.event" title="Timing.event : Identifies specific times when the event occurs.">event</a> 
            <a name="Timing.event"> </a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <span style="padding: 3px" title="This element is included in summaries">Σ</span> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">0..*</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <a href="datatypes.html#dateTime">dateTime</a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">When the event occurs
            <br/>  
          </td> 
        </tr> 

        <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white;">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data: image/png;base64,iVBORw0KG
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            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAAWCAYAAAABxvaqAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
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            <a href="datatypes-definitions.html#Timing.repeat" title="Timing.repeat : A set of rules that describe when the event is scheduled.">repeat</a> 
            <a name="Timing.repeat"> </a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <span style="padding: 3px" title="This element is included in summaries">Σ</span> 
            <span style="padding: 3px" title="This element has or is affected by some invariants">I</span> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">0..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <a href="element.html">Element</a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">When the event is to occur
            <br/>  
            <span style="font-style: italic" title="tim-9">+ If there's an offset, there must be a when (and not C, CM, CD, CV)</span> 
            <br/>  
            <span style="font-style: italic" title="tim-5">+ period SHALL be a non-negative value</span> 
            <br/>  
            <span style="font-style: italic" title="tim-6">+ If there's a periodMax, there must be a period</span> 
            <br/>  
            <span style="font-style: italic" title="tim-7">+ If there's a durationMax, there must be a duration</span> 
            <br/>  
            <span style="font-style: italic" title="tim-8">+ If there's a countMax, there must be a count</span> 
            <br/>  
            <span style="font-style: italic" title="tim-1">+ if there's a duration, there needs to be duration units</span> 
            <br/>  
            <span style="font-style: italic" title="tim-10">+ If there's a timeOfDay, there cannot be be a when, or vice versa</span> 
            <br/>  
            <span style="font-style: italic" title="tim-2">+ if there's a period, there needs to be period units</span> 
            <br/>  
            <span style="font-style: italic" title="tim-4">+ duration SHALL be a non-negative value</span> 
          </td> 
        </tr> 

        <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white;">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
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            FXxMWBoUJBn9sDgmDewcJCRyJJBoEkRyYmAABPZQEAAOhA5seFDMaDw8BAQ9TpiokJyWwtLUhADs=" style="background-color: white; background-color: inherit" title="Choice of Types"/>  
            <a href="datatypes-definitions.html#Timing.repeat.bounds_x_" title="Timing.repeat.bounds[x] : Either a duration for the length of the timing schedule, a range
             of possible length, or outer bounds for start and/or end limits of the timing schedule.">bounds[x]</a> 
            <a name="Timing.repeat.bounds_x_"> </a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <span style="padding: 3px" title="This element is included in summaries">Σ</span> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">0..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px"/> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">Length/Range of lengths, or (Start and/or end) limits</td> 
        </tr> 

        <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white;">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
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            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAWCAYAAADJqhx8AAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
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            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAWCAYAAADJqhx8AAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
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            <span title="A length of time.">boundsDuration</span> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
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          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
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          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
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            <a href="datatypes.html#Duration">Duration</a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
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        </tr> 

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            <span title="A set of ordered Quantities defined by a low and high limit.">boundsRange</span> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
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          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
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          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
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            <a href="datatypes.html#Range">Range</a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px"/> 
        </tr> 

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            <span title="A time period defined by a start and end date and optionally time.">boundsPeriod</span> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px"/> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px"/> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <a href="datatypes.html#Period">Period</a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px"/> 
        </tr> 

        <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white;">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
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            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABmJLR0QA/wD/AP+gvaeTAAAACXBIW
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            <a href="datatypes-definitions.html#Timing.repeat.count" title="Timing.repeat.count : A total count of the desired number of repetitions.">count</a> 
            <a name="Timing.repeat.count"> </a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <span style="padding: 3px" title="This element is included in summaries">Σ</span> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">0..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <a href="datatypes.html#integer">integer</a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">Number of times to repeat</td> 
        </tr> 

        <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white;">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
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            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABmJLR0QA/wD/AP+gvaeTAAAACXBIW
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            <a href="datatypes-definitions.html#Timing.repeat.countMax" title="Timing.repeat.countMax : A maximum value for the count of the desired repetitions (e.g.
             do something 6-8 times).">countMax</a> 
            <a name="Timing.repeat.countMax"> </a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <span style="padding: 3px" title="This element is included in summaries">Σ</span> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">0..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <a href="datatypes.html#integer">integer</a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">Maximum number of times to repeat</td> 
        </tr> 

        <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white;">
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            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABmJLR0QA/wD/AP+gvaeTAAAACXBIW
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            <a href="datatypes-definitions.html#Timing.repeat.duration" title="Timing.repeat.duration : How long this thing happens for when it happens.">duration</a> 
            <a name="Timing.repeat.duration"> </a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <span style="padding: 3px" title="This element is included in summaries">Σ</span> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">0..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <a href="datatypes.html#decimal">decimal</a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">How long when it happens</td> 
        </tr> 

        <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white;">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data: image/png;base64,iVBORw0KG
          goAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAAMElEQVR42u3QwQkAMAwDsezq/WdoskKgFAoy6HkfV5LamJ1tc7MHAAD+5QQAAO
          CZBkurQFbnaRSlAAAAAElFTkSuQmCC)">
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAAWCAYAAAABxvaqAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
            3RJTUUH3wYeFzIs1vtcMQAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAAE0lEQVQI12P4//8/AxMDAw
            NdCABMPwMo2ctnoQAAAABJRU5ErkJggg==" style="background-color: inherit"/> 
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAWCAYAAADJqhx8AAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
            3RJTUUH3wYeFzMPbYccAgAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAAMElEQVQ4y+3OQREAIBDDwA
            v+PQcFFN5MIyCzqHMKUGVCpMFLK97heq+gggoq+EiwAVjvMhFGmlEUAAAAAElFTkSuQmCC" style="background-color: inherit"/> 
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAWCAYAAADJqhx8AAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
            3RJTUUH3wYeFzI3XJ6V3QAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAANklEQVQ4y+2RsQ0AIAzDav
            7/2VzQwoCY4iWbZSmo1QGoUgNMghvWaIejPQW/CrrNCylIwcOCDYfLNRcNer4SAAAAAElFTkSuQmCC" style="background-color: inherit"/> 
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABmJLR0QA/wD/AP+gvaeTAAAACXBIW
            XMAAAsTAAALEwEAmpwYAAAAB3RJTUUH3gYBFzI0BrFQCwAAAERJREFUOMtj/P//PwMlgImBQjDwBrCcOnWKokBgYWBgYDCU+06W5i
            8MUggvnH/EOVJjAW4AuQHJ+O75LYqikXE0LzAAALePEntTkEoSAAAAAElFTkSuQmCC" style="background-color: white; background-color: inherit" title="Primitive Data Type"/>  
            <a href="datatypes-definitions.html#Timing.repeat.durationMax" title="Timing.repeat.durationMax : The upper limit of how long this thing happens for when it
             happens.">durationMax</a> 
            <a name="Timing.repeat.durationMax"> </a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <span style="padding: 3px" title="This element is included in summaries">Σ</span> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">0..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <a href="datatypes.html#decimal">decimal</a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">How long when it happens (Max)</td> 
        </tr> 

        <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white;">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data: image/png;base64,iVBORw0KG
          goAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAAMElEQVR42u3QwQkAMAwDsezq/WdoskKgFAoy6HkfV5LamJ1tc7MHAAD+5QQAAO
          CZBkurQFbnaRSlAAAAAElFTkSuQmCC)">
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAAWCAYAAAABxvaqAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
            3RJTUUH3wYeFzIs1vtcMQAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAAE0lEQVQI12P4//8/AxMDAw
            NdCABMPwMo2ctnoQAAAABJRU5ErkJggg==" style="background-color: inherit"/> 
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAWCAYAAADJqhx8AAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
            3RJTUUH3wYeFzMPbYccAgAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAAMElEQVQ4y+3OQREAIBDDwA
            v+PQcFFN5MIyCzqHMKUGVCpMFLK97heq+gggoq+EiwAVjvMhFGmlEUAAAAAElFTkSuQmCC" style="background-color: inherit"/> 
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAWCAYAAADJqhx8AAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
            3RJTUUH3wYeFzI3XJ6V3QAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAANklEQVQ4y+2RsQ0AIAzDav
            7/2VzQwoCY4iWbZSmo1QGoUgNMghvWaIejPQW/CrrNCylIwcOCDYfLNRcNer4SAAAAAElFTkSuQmCC" style="background-color: inherit"/> 
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABmJLR0QA/wD/AP+gvaeTAAAACXBIW
            XMAAAsTAAALEwEAmpwYAAAAB3RJTUUH3gYBFzI0BrFQCwAAAERJREFUOMtj/P//PwMlgImBQjDwBrCcOnWKokBgYWBgYDCU+06W5i
            8MUggvnH/EOVJjAW4AuQHJ+O75LYqikXE0LzAAALePEntTkEoSAAAAAElFTkSuQmCC" style="background-color: white; background-color: inherit" title="Primitive Data Type"/>  
            <a href="datatypes-definitions.html#Timing.repeat.durationUnit" title="Timing.repeat.durationUnit : The units of time for the duration, in UCUM units.">durationUnit</a> 
            <a name="Timing.repeat.durationUnit"> </a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <span style="padding: 3px" title="This element is included in summaries">Σ</span> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">0..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <a href="datatypes.html#code">code</a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">s | min | h | d | wk | mo | a - unit of time (UCUM)
            <br/>  
            <a href="valueset-units-of-time.html" title="A unit of time (units from UCUM).">UnitsOfTime</a>  (
            <a href="terminologies.html#required" title="To be conformant, the concept in this element SHALL be from the specified value set">Required</a> )
          </td> 
        </tr> 

        <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white;">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data: image/png;base64,iVBORw0KG
          goAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAAMElEQVR42u3QwQkAMAwDsezq/WdoskKgFAoy6HkfV5LamJ1tc7MHAAD+5QQAAO
          CZBkurQFbnaRSlAAAAAElFTkSuQmCC)">
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAAWCAYAAAABxvaqAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
            3RJTUUH3wYeFzIs1vtcMQAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAAE0lEQVQI12P4//8/AxMDAw
            NdCABMPwMo2ctnoQAAAABJRU5ErkJggg==" style="background-color: inherit"/> 
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAWCAYAAADJqhx8AAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
            3RJTUUH3wYeFzMPbYccAgAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAAMElEQVQ4y+3OQREAIBDDwA
            v+PQcFFN5MIyCzqHMKUGVCpMFLK97heq+gggoq+EiwAVjvMhFGmlEUAAAAAElFTkSuQmCC" style="background-color: inherit"/> 
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAWCAYAAADJqhx8AAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
            3RJTUUH3wYeFzI3XJ6V3QAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAANklEQVQ4y+2RsQ0AIAzDav
            7/2VzQwoCY4iWbZSmo1QGoUgNMghvWaIejPQW/CrrNCylIwcOCDYfLNRcNer4SAAAAAElFTkSuQmCC" style="background-color: inherit"/> 
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABmJLR0QA/wD/AP+gvaeTAAAACXBIW
            XMAAAsTAAALEwEAmpwYAAAAB3RJTUUH3gYBFzI0BrFQCwAAAERJREFUOMtj/P//PwMlgImBQjDwBrCcOnWKokBgYWBgYDCU+06W5i
            8MUggvnH/EOVJjAW4AuQHJ+O75LYqikXE0LzAAALePEntTkEoSAAAAAElFTkSuQmCC" style="background-color: white; background-color: inherit" title="Primitive Data Type"/>  
            <a href="datatypes-definitions.html#Timing.repeat.frequency" title="Timing.repeat.frequency : The number of times to repeat the action within the specified
             period / period range (i.e. both period and periodMax provided).">frequency</a> 
            <a name="Timing.repeat.frequency"> </a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <span style="padding: 3px" title="This element is included in summaries">Σ</span> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">0..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <a href="datatypes.html#integer">integer</a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">Event occurs frequency times per period</td> 
        </tr> 

        <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white;">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data: image/png;base64,iVBORw0KG
          goAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAAMElEQVR42u3QwQkAMAwDsezq/WdoskKgFAoy6HkfV5LamJ1tc7MHAAD+5QQAAO
          CZBkurQFbnaRSlAAAAAElFTkSuQmCC)">
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAAWCAYAAAABxvaqAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
            3RJTUUH3wYeFzIs1vtcMQAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAAE0lEQVQI12P4//8/AxMDAw
            NdCABMPwMo2ctnoQAAAABJRU5ErkJggg==" style="background-color: inherit"/> 
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAWCAYAAADJqhx8AAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
            3RJTUUH3wYeFzMPbYccAgAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAAMElEQVQ4y+3OQREAIBDDwA
            v+PQcFFN5MIyCzqHMKUGVCpMFLK97heq+gggoq+EiwAVjvMhFGmlEUAAAAAElFTkSuQmCC" style="background-color: inherit"/> 
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAWCAYAAADJqhx8AAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
            3RJTUUH3wYeFzI3XJ6V3QAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAANklEQVQ4y+2RsQ0AIAzDav
            7/2VzQwoCY4iWbZSmo1QGoUgNMghvWaIejPQW/CrrNCylIwcOCDYfLNRcNer4SAAAAAElFTkSuQmCC" style="background-color: inherit"/> 
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABmJLR0QA/wD/AP+gvaeTAAAACXBIW
            XMAAAsTAAALEwEAmpwYAAAAB3RJTUUH3gYBFzI0BrFQCwAAAERJREFUOMtj/P//PwMlgImBQjDwBrCcOnWKokBgYWBgYDCU+06W5i
            8MUggvnH/EOVJjAW4AuQHJ+O75LYqikXE0LzAAALePEntTkEoSAAAAAElFTkSuQmCC" style="background-color: white; background-color: inherit" title="Primitive Data Type"/>  
            <a href="datatypes-definitions.html#Timing.repeat.frequencyMax" title="Timing.repeat.frequencyMax : If present, indicates that the frequency is a range - so
             to repeat between [frequency] and [frequencyMax] times within the period or period range.">frequencyMax</a> 
            <a name="Timing.repeat.frequencyMax"> </a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <span style="padding: 3px" title="This element is included in summaries">Σ</span> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">0..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <a href="datatypes.html#integer">integer</a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">Event occurs up to frequencyMax times per period</td> 
        </tr> 

        <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white;">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data: image/png;base64,iVBORw0KG
          goAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAAMElEQVR42u3QwQkAMAwDsezq/WdoskKgFAoy6HkfV5LamJ1tc7MHAAD+5QQAAO
          CZBkurQFbnaRSlAAAAAElFTkSuQmCC)">
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAAWCAYAAAABxvaqAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
            3RJTUUH3wYeFzIs1vtcMQAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAAE0lEQVQI12P4//8/AxMDAw
            NdCABMPwMo2ctnoQAAAABJRU5ErkJggg==" style="background-color: inherit"/> 
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAWCAYAAADJqhx8AAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
            3RJTUUH3wYeFzMPbYccAgAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAAMElEQVQ4y+3OQREAIBDDwA
            v+PQcFFN5MIyCzqHMKUGVCpMFLK97heq+gggoq+EiwAVjvMhFGmlEUAAAAAElFTkSuQmCC" style="background-color: inherit"/> 
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAWCAYAAADJqhx8AAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
            3RJTUUH3wYeFzI3XJ6V3QAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAANklEQVQ4y+2RsQ0AIAzDav
            7/2VzQwoCY4iWbZSmo1QGoUgNMghvWaIejPQW/CrrNCylIwcOCDYfLNRcNer4SAAAAAElFTkSuQmCC" style="background-color: inherit"/> 
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABmJLR0QA/wD/AP+gvaeTAAAACXBIW
            XMAAAsTAAALEwEAmpwYAAAAB3RJTUUH3gYBFzI0BrFQCwAAAERJREFUOMtj/P//PwMlgImBQjDwBrCcOnWKokBgYWBgYDCU+06W5i
            8MUggvnH/EOVJjAW4AuQHJ+O75LYqikXE0LzAAALePEntTkEoSAAAAAElFTkSuQmCC" style="background-color: white; background-color: inherit" title="Primitive Data Type"/>  
            <a href="datatypes-definitions.html#Timing.repeat.period" title="Timing.repeat.period : Indicates the duration of time over which repetitions are to occur;
             e.g. to express &quot;3 times per day&quot;, 3 would be the frequency and &quot;1 day&quot;
             would be the period.">period</a> 
            <a name="Timing.repeat.period"> </a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <span style="padding: 3px" title="This element is included in summaries">Σ</span> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">0..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <a href="datatypes.html#decimal">decimal</a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">Event occurs frequency times per period</td> 
        </tr> 

        <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white;">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data: image/png;base64,iVBORw0KG
          goAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAAMElEQVR42u3QwQkAMAwDsezq/WdoskKgFAoy6HkfV5LamJ1tc7MHAAD+5QQAAO
          CZBkurQFbnaRSlAAAAAElFTkSuQmCC)">
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAAWCAYAAAABxvaqAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
            3RJTUUH3wYeFzIs1vtcMQAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAAE0lEQVQI12P4//8/AxMDAw
            NdCABMPwMo2ctnoQAAAABJRU5ErkJggg==" style="background-color: inherit"/> 
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAWCAYAAADJqhx8AAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
            3RJTUUH3wYeFzMPbYccAgAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAAMElEQVQ4y+3OQREAIBDDwA
            v+PQcFFN5MIyCzqHMKUGVCpMFLK97heq+gggoq+EiwAVjvMhFGmlEUAAAAAElFTkSuQmCC" style="background-color: inherit"/> 
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAWCAYAAADJqhx8AAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
            3RJTUUH3wYeFzI3XJ6V3QAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAANklEQVQ4y+2RsQ0AIAzDav
            7/2VzQwoCY4iWbZSmo1QGoUgNMghvWaIejPQW/CrrNCylIwcOCDYfLNRcNer4SAAAAAElFTkSuQmCC" style="background-color: inherit"/> 
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABmJLR0QA/wD/AP+gvaeTAAAACXBIW
            XMAAAsTAAALEwEAmpwYAAAAB3RJTUUH3gYBFzI0BrFQCwAAAERJREFUOMtj/P//PwMlgImBQjDwBrCcOnWKokBgYWBgYDCU+06W5i
            8MUggvnH/EOVJjAW4AuQHJ+O75LYqikXE0LzAAALePEntTkEoSAAAAAElFTkSuQmCC" style="background-color: white; background-color: inherit" title="Primitive Data Type"/>  
            <a href="datatypes-definitions.html#Timing.repeat.periodMax" title="Timing.repeat.periodMax : If present, indicates that the period is a range from [period]
             to [periodMax], allowing expressing concepts such as &quot;do this once every 3-5 days.">periodMax</a> 
            <a name="Timing.repeat.periodMax"> </a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <span style="padding: 3px" title="This element is included in summaries">Σ</span> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">0..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <a href="datatypes.html#decimal">decimal</a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">Upper limit of period (3-4 hours)</td> 
        </tr> 

        <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white;">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data: image/png;base64,iVBORw0KG
          goAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAAMElEQVR42u3QwQkAMAwDsezq/WdoskKgFAoy6HkfV5LamJ1tc7MHAAD+5QQAAO
          CZBkurQFbnaRSlAAAAAElFTkSuQmCC)">
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAAWCAYAAAABxvaqAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
            3RJTUUH3wYeFzIs1vtcMQAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAAE0lEQVQI12P4//8/AxMDAw
            NdCABMPwMo2ctnoQAAAABJRU5ErkJggg==" style="background-color: inherit"/> 
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAWCAYAAADJqhx8AAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
            3RJTUUH3wYeFzMPbYccAgAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAAMElEQVQ4y+3OQREAIBDDwA
            v+PQcFFN5MIyCzqHMKUGVCpMFLK97heq+gggoq+EiwAVjvMhFGmlEUAAAAAElFTkSuQmCC" style="background-color: inherit"/> 
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAWCAYAAADJqhx8AAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
            3RJTUUH3wYeFzI3XJ6V3QAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAANklEQVQ4y+2RsQ0AIAzDav
            7/2VzQwoCY4iWbZSmo1QGoUgNMghvWaIejPQW/CrrNCylIwcOCDYfLNRcNer4SAAAAAElFTkSuQmCC" style="background-color: inherit"/> 
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABmJLR0QA/wD/AP+gvaeTAAAACXBIW
            XMAAAsTAAALEwEAmpwYAAAAB3RJTUUH3gYBFzI0BrFQCwAAAERJREFUOMtj/P//PwMlgImBQjDwBrCcOnWKokBgYWBgYDCU+06W5i
            8MUggvnH/EOVJjAW4AuQHJ+O75LYqikXE0LzAAALePEntTkEoSAAAAAElFTkSuQmCC" style="background-color: white; background-color: inherit" title="Primitive Data Type"/>  
            <a href="datatypes-definitions.html#Timing.repeat.periodUnit" title="Timing.repeat.periodUnit : The units of time for the period in UCUM units.">periodUnit</a> 
            <a name="Timing.repeat.periodUnit"> </a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <span style="padding: 3px" title="This element is included in summaries">Σ</span> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">0..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <a href="datatypes.html#code">code</a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">s | min | h | d | wk | mo | a - unit of time (UCUM)
            <br/>  
            <a href="valueset-units-of-time.html" title="A unit of time (units from UCUM).">UnitsOfTime</a>  (
            <a href="terminologies.html#required" title="To be conformant, the concept in this element SHALL be from the specified value set">Required</a> )
          </td> 
        </tr> 

        <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white;">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data: image/png;base64,iVBORw0KG
          goAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAAMElEQVR42u3QwQkAMAwDsezq/WdoskKgFAoy6HkfV5LamJ1tc7MHAAD+5QQAAO
          CZBkurQFbnaRSlAAAAAElFTkSuQmCC)">
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAAWCAYAAAABxvaqAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
            3RJTUUH3wYeFzIs1vtcMQAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAAE0lEQVQI12P4//8/AxMDAw
            NdCABMPwMo2ctnoQAAAABJRU5ErkJggg==" style="background-color: inherit"/> 
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAWCAYAAADJqhx8AAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
            3RJTUUH3wYeFzMPbYccAgAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAAMElEQVQ4y+3OQREAIBDDwA
            v+PQcFFN5MIyCzqHMKUGVCpMFLK97heq+gggoq+EiwAVjvMhFGmlEUAAAAAElFTkSuQmCC" style="background-color: inherit"/> 
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAWCAYAAADJqhx8AAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
            3RJTUUH3wYeFzI3XJ6V3QAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAANklEQVQ4y+2RsQ0AIAzDav
            7/2VzQwoCY4iWbZSmo1QGoUgNMghvWaIejPQW/CrrNCylIwcOCDYfLNRcNer4SAAAAAElFTkSuQmCC" style="background-color: inherit"/> 
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABmJLR0QA/wD/AP+gvaeTAAAACXBIW
            XMAAAsTAAALEwEAmpwYAAAAB3RJTUUH3gYBFzI0BrFQCwAAAERJREFUOMtj/P//PwMlgImBQjDwBrCcOnWKokBgYWBgYDCU+06W5i
            8MUggvnH/EOVJjAW4AuQHJ+O75LYqikXE0LzAAALePEntTkEoSAAAAAElFTkSuQmCC" style="background-color: white; background-color: inherit" title="Primitive Data Type"/>  
            <a href="datatypes-definitions.html#Timing.repeat.dayOfWeek" title="Timing.repeat.dayOfWeek : If one or more days of week is provided, then the action happens
             only on the specified day(s).">dayOfWeek</a> 
            <a name="Timing.repeat.dayOfWeek"> </a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <span style="padding: 3px" title="This element is included in summaries">Σ</span> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">0..*</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <a href="datatypes.html#code">code</a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">mon | tue | wed | thu | fri | sat | sun
            <br/>  
            <a href="valueset-days-of-week.html">DaysOfWeek</a>  (
            <a href="terminologies.html#required" title="To be conformant, the concept in this element SHALL be from the specified value set">Required</a> )
            <br/>  
          </td> 
        </tr> 

        <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white;">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data: image/png;base64,iVBORw0KG
          goAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAAMElEQVR42u3QwQkAMAwDsezq/WdoskKgFAoy6HkfV5LamJ1tc7MHAAD+5QQAAO
          CZBkurQFbnaRSlAAAAAElFTkSuQmCC)">
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAAWCAYAAAABxvaqAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
            3RJTUUH3wYeFzIs1vtcMQAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAAE0lEQVQI12P4//8/AxMDAw
            NdCABMPwMo2ctnoQAAAABJRU5ErkJggg==" style="background-color: inherit"/> 
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAWCAYAAADJqhx8AAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
            3RJTUUH3wYeFzMPbYccAgAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAAMElEQVQ4y+3OQREAIBDDwA
            v+PQcFFN5MIyCzqHMKUGVCpMFLK97heq+gggoq+EiwAVjvMhFGmlEUAAAAAElFTkSuQmCC" style="background-color: inherit"/> 
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAWCAYAAADJqhx8AAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
            3RJTUUH3wYeFzI3XJ6V3QAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAANklEQVQ4y+2RsQ0AIAzDav
            7/2VzQwoCY4iWbZSmo1QGoUgNMghvWaIejPQW/CrrNCylIwcOCDYfLNRcNer4SAAAAAElFTkSuQmCC" style="background-color: inherit"/> 
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABmJLR0QA/wD/AP+gvaeTAAAACXBIW
            XMAAAsTAAALEwEAmpwYAAAAB3RJTUUH3gYBFzI0BrFQCwAAAERJREFUOMtj/P//PwMlgImBQjDwBrCcOnWKokBgYWBgYDCU+06W5i
            8MUggvnH/EOVJjAW4AuQHJ+O75LYqikXE0LzAAALePEntTkEoSAAAAAElFTkSuQmCC" style="background-color: white; background-color: inherit" title="Primitive Data Type"/>  
            <a href="datatypes-definitions.html#Timing.repeat.timeOfDay" title="Timing.repeat.timeOfDay : Specified time of day for action to take place.">timeOfDay</a> 
            <a name="Timing.repeat.timeOfDay"> </a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <span style="padding: 3px" title="This element is included in summaries">Σ</span> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">0..*</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <a href="datatypes.html#time">time</a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">Time of day for action
            <br/>  
          </td> 
        </tr> 

        <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white;">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data: image/png;base64,iVBORw0KG
          goAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAAMElEQVR42u3QwQkAMAwDsezq/WdoskKgFAoy6HkfV5LamJ1tc7MHAAD+5QQAAO
          CZBkurQFbnaRSlAAAAAElFTkSuQmCC)">
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAAWCAYAAAABxvaqAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
            3RJTUUH3wYeFzIs1vtcMQAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAAE0lEQVQI12P4//8/AxMDAw
            NdCABMPwMo2ctnoQAAAABJRU5ErkJggg==" style="background-color: inherit"/> 
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAWCAYAAADJqhx8AAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
            3RJTUUH3wYeFzMPbYccAgAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAAMElEQVQ4y+3OQREAIBDDwA
            v+PQcFFN5MIyCzqHMKUGVCpMFLK97heq+gggoq+EiwAVjvMhFGmlEUAAAAAElFTkSuQmCC" style="background-color: inherit"/> 
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAWCAYAAADJqhx8AAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
            3RJTUUH3wYeFzI3XJ6V3QAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAANklEQVQ4y+2RsQ0AIAzDav
            7/2VzQwoCY4iWbZSmo1QGoUgNMghvWaIejPQW/CrrNCylIwcOCDYfLNRcNer4SAAAAAElFTkSuQmCC" style="background-color: inherit"/> 
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABmJLR0QA/wD/AP+gvaeTAAAACXBIW
            XMAAAsTAAALEwEAmpwYAAAAB3RJTUUH3gYBFzI0BrFQCwAAAERJREFUOMtj/P//PwMlgImBQjDwBrCcOnWKokBgYWBgYDCU+06W5i
            8MUggvnH/EOVJjAW4AuQHJ+O75LYqikXE0LzAAALePEntTkEoSAAAAAElFTkSuQmCC" style="background-color: white; background-color: inherit" title="Primitive Data Type"/>  
            <a href="datatypes-definitions.html#Timing.repeat.when" title="Timing.repeat.when : Real world events that the occurrence of the event should be tied
             to.">when</a> 
            <a name="Timing.repeat.when"> </a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <span style="padding: 3px" title="This element is included in summaries">Σ</span> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">0..*</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <a href="datatypes.html#code">code</a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">Regular life events the event is tied to
            <br/>  
            <a href="valueset-event-timing.html" title="Real world event relating to the schedule.">EventTiming</a>  (
            <a href="terminologies.html#required" title="To be conformant, the concept in this element SHALL be from the specified value set">Required</a> )
            <br/>  
          </td> 
        </tr> 

        <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white;">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data: image/png;base64,iVBORw0KG
          goAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAAL0lEQVR42u3XsQ0AQAgCQHdl/xn8jxvYWB3JlTR0VJLa+OltBwAAYP6EEQAAgC
          sPVYVAgIJrA/sAAAAASUVORK5CYII=)">
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAAWCAYAAAABxvaqAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
            3RJTUUH3wYeFzIs1vtcMQAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAAE0lEQVQI12P4//8/AxMDAw
            NdCABMPwMo2ctnoQAAAABJRU5ErkJggg==" style="background-color: inherit"/> 
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAWCAYAAADJqhx8AAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
            3RJTUUH3wYeFzMPbYccAgAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAAMElEQVQ4y+3OQREAIBDDwA
            v+PQcFFN5MIyCzqHMKUGVCpMFLK97heq+gggoq+EiwAVjvMhFGmlEUAAAAAElFTkSuQmCC" style="background-color: inherit"/> 
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAWCAYAAADJqhx8AAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
            3RJTUUH3wYeFzME+lXFigAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAANklEQVQ4y+3OsRUAIAjEUO
            L+O8cJABttJM11/x1qZAGqRBEVcNIqdWj1efDqQbb3HwwwwEfABmQUHSPM9dtDAAAAAElFTkSuQmCC" style="background-color: inherit"/> 
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABmJLR0QA/wD/AP+gvaeTAAAACXBIW
            XMAAAsTAAALEwEAmpwYAAAAB3RJTUUH3gYBFzI0BrFQCwAAAERJREFUOMtj/P//PwMlgImBQjDwBrCcOnWKokBgYWBgYDCU+06W5i
            8MUggvnH/EOVJjAW4AuQHJ+O75LYqikXE0LzAAALePEntTkEoSAAAAAElFTkSuQmCC" style="background-color: white; background-color: inherit" title="Primitive Data Type"/>  
            <a href="datatypes-definitions.html#Timing.repeat.offset" title="Timing.repeat.offset : The number of minutes from the event. If the event code does not
             indicate whether the minutes is before or after the event, then the offset is assumed
             to be after the event.">offset</a> 
            <a name="Timing.repeat.offset"> </a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <span style="padding: 3px" title="This element is included in summaries">Σ</span> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">0..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <a href="datatypes.html#unsignedInt">unsignedInt</a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">Minutes from event (before or after)</td> 
        </tr> 

        <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white;">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data: image/png;base64,iVBORw0KG
          goAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAAI0lEQVR42u3QIQEAAAACIL/6/4MvTAQOkLYBAAB4kAAAANwMad9AqkRjgNAAAA
          AASUVORK5CYII=)">
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAAWCAYAAAABxvaqAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
            3RJTUUH3wYeFzIs1vtcMQAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAAE0lEQVQI12P4//8/AxMDAw
            NdCABMPwMo2ctnoQAAAABJRU5ErkJggg==" style="background-color: inherit"/> 
            <img alt="." class="hierarchy" src="data: image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAWCAYAAADJqhx8AAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB
            3RJTUUH3wYeFzME+lXFigAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAANklEQVQ4y+3OsRUAIAjEUO
            L+O8cJABttJM11/x1qZAGqRBEVcNIqdWj1efDqQbb3HwwwwEfABmQUHSPM9dtDAAAAAElFTkSuQmCC" style="background-color: inherit"/> 
            <img alt="." class="hierarchy" src="data: image/png;base64,R0lGODlhEAAQAOZ/APrkusOiYvvfqbiXWaV2G+jGhdq1b8GgYf3v1frw3vTUlsWkZNewbcSjY/DQk
            ad4Hb6dXv3u0f3v1ObEgfPTlerJiP3w1v79+e7OkPrfrfnjuNOtZPrpydaxa+/YrvvdpP779ZxvFPvnwKKBQaFyF/369M2vdaqHRP
            z58/HNh/vowufFhfroxO3OkPrluv779tK0e6JzGProwvrow9m4eOnIifPTlPDPkP78+Naxaf3v0/zowfXRi+bFhLWUVv379/rnwPv
            szv3rye3LiPvnv+3MjPDasKiIS/789/3x2f747eXDg+7Mifvu0tu7f+/QkfDTnPXWmPrjsvrjtPbPgrqZW+/QlPz48K2EMv36866O
            UPvowat8Ivvgq/Pbrvzgq/PguvrgrqN0Gda2evfYm9+7d/rpw9q6e/LSku/Rl/XVl/LSlfrkt+zVqe7Wqv3x1/bNffbOf59wFdS6i
            f3u0vrqyP3owPvepfXQivDQkO/PkKh9K7STVf779P///////yH5BAEAAH8ALAAAAAAQABAAAAfNgH+Cg36FfoOIhH4JBxBghYl/hQ
            kNAV0IVT5GkJKLCwtQaSsSdx9aR26Gcwt2IkQaNRI6dBERIzCFDSgWSW8WCDkbBnoOQ3uFARc/JQJfCAZlT0x4ZFyFBxdNQT9ZCBN
            WKQoKUQ+FEDgcdTIAV14YDmg2CgSFA0hmQC5TLE4VRTdrKJAoxOeFCzZSwsw4U6BCizwUQhQyEaAPiAwCVNCY0FCNnA6GPAwYoETI
            FgY9loiRA4dToTYnsOxg8CBGHE6ICvEYQ4AKzkidfgoKBAA7" style="background-color: white; background-color: inherit" title="Data Type"/>  
            <a href="datatypes-definitions.html#Timing.code" title="Timing.code : A code for the timing schedule. Some codes such as BID are ubiquitous, but
             many institutions define their own additional codes. If a code is provided, the code is
             understood to be a complete statement of whatever is specified in the structured timing
             data, and either the code or the data may be used to interpret the Timing, with the exception
             that .repeat.bounds still applies over the code (and is not contained in the code).">code</a> 
            <a name="Timing.code"> </a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <span style="padding: 3px" title="This element is included in summaries">Σ</span> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">0..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">
            <a href="datatypes.html#CodeableConcept">CodeableConcept</a> 
          </td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px">BID | TID | QID | AM | PM | QD | QOD | Q4H | Q6H +
            <br/>  
            <a href="valueset-timing-abbreviation.html" title="Code for a known / defined timing pattern.">TimingAbbreviation</a>  (
            <a href="terminologies.html#preferred" title="Instances are encouraged to draw from the specified codes for interoperability purposes
             but are not required to do so to be considered conformant.">Preferred</a> )
          </td> 
        </tr> 

        <tr> 
          <td class="hierarchy" colspan="5">
            <br/>  
            <a href="formats.html#table" title="Legend for this format">
              <img alt="doco" src="help16.png" style="background-color: inherit"/>  Documentation for this format
            </a> 
          </td> 
        </tr> 
      </table> 
    </div> 
  </text> 
  <url value="http://hl7.org/fhir/StructureDefinition/Timing"/> 
  <name value="Timing"/> 
  <status value="draft"/> 
  <date value="2019-10-24T11:53:00+11:00"/> 
  <publisher value="HL7 FHIR Standard"/> 
  <contact> 
    <telecom> 
      <system value="url"/> 
      <value value="http://hl7.org/fhir"/> 
    </telecom> 
  </contact> 
  <description value="Base StructureDefinition for Timing Type"/> 
  <purpose value="Need to able to track proposed timing schedules. There are several different ways to do
   this: one or more specified times, a simple rules like three times a day, or  before/after
   meals."/> 
  <fhirVersion value="3.0.2"/> 
  <mapping> 
    <identity value="v2"/> 
    <uri value="http://hl7.org/v2"/> 
    <name value="HL7 v2 Mapping"/> 
  </mapping> 
  <mapping> 
    <identity value="rim"/> 
    <uri value="http://hl7.org/v3"/> 
    <name value="RIM Mapping"/> 
  </mapping> 
  <kind value="complex-type"/> 
  <abstract value="false"/> 
  <type value="Timing"/> 
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Element"/> 
  <derivation value="specialization"/> 
  <snapshot> 
    <element id="Timing">
      <path value="Timing"/> 
      <short value="A timing schedule that specifies an event that may occur multiple times"/> 
      <definition value="Specifies an event that may occur multiple times. Timing schedules are used to record
       when things are planned, expected or requested to occur. The most common usage is in dosage
       instructions for medications. They are also used when planning care of various kinds,
       and may be used for reporting the schedule to which past regular activities were carried
       out."/> 
      <comment value="A timing schedule can be either a list of events - intervals on which the event occurs,
       or a single event with repeating criteria or just repeating criteria with no actual event.
        When both event and a repeating specification are provided, the list of events should
       be understood as an interpretation of the information in the repeat structure."/> 
      <min value="0"/> 
      <max value="*"/> 
      <condition value="ele-1"/> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() | (children().count() &gt; id.count())"/> 
        <xpath value="@value|f:*|h:div"/> 
        <source value="Element"/> 
      </constraint> 
      <mapping> 
        <identity value="rim"/> 
        <map value="n/a"/> 
      </mapping> 
      <mapping> 
        <identity value="v2"/> 
        <map value="N/A"/> 
      </mapping> 
      <mapping> 
        <identity value="rim"/> 
        <map value="QSET&lt;TS&gt; (GTS)"/> 
      </mapping> 
    </element> 
    <element id="Timing.id">
      <path value="Timing.id"/> 
      <representation value="xmlAttr"/> 
      <short value="xml:id (or equivalent in JSON)"/> 
      <definition value="unique id for the element within a resource (for internal references). This may be any
       string value that does not contain spaces."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="Element.id"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="string"/> 
      </type> 
      <mapping> 
        <identity value="rim"/> 
        <map value="n/a"/> 
      </mapping> 
    </element> 
    <element id="Timing.extension">
      <path value="Timing.extension"/> 
      <slicing> 
        <discriminator> 
          <type value="value"/> 
          <path value="url"/> 
        </discriminator> 
        <description value="Extensions are always sliced by (at least) url"/> 
        <rules value="open"/> 
      </slicing> 
      <short value="Additional Content defined by implementations"/> 
      <definition value="May be used to represent additional information that is not part of the basic definition
       of the element. In order 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 is allowed to define an extension, there is a set of requirements that SHALL
       be met as part of the definition of the extension."/> 
      <comment value="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."/> 
      <alias value="extensions"/> 
      <alias value="user content"/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="Element.extension"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Extension"/> 
      </type> 
      <mapping> 
        <identity value="rim"/> 
        <map value="n/a"/> 
      </mapping> 
    </element> 
    <element id="Timing.event">
      <path value="Timing.event"/> 
      <short value="When the event occurs"/> 
      <definition value="Identifies specific times when the event occurs."/> 
      <requirements value="In an MAR, for instance, you need to take a general specification, and turn it into a
       precise specification."/> 
      <min value="0"/> 
      <max value="*"/> 
      <type> 
        <code value="dateTime"/> 
      </type> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="QLIST&lt;TS&gt;"/> 
      </mapping> 
    </element> 
    <element id="Timing.repeat">
      <path value="Timing.repeat"/> 
      <short value="When the event is to occur"/> 
      <definition value="A set of rules that describe when the event is scheduled."/> 
      <requirements value="Many timing schedules are determined by regular repetitions."/> 
      <min value="0"/> 
      <max value="1"/> 
      <type> 
        <code value="Element"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() | (children().count() &gt; id.count())"/> 
        <xpath value="@value|f:*|h:div"/> 
        <source value="Element"/> 
      </constraint> 
      <constraint> 
        <key value="tim-9"/> 
        <severity value="error"/> 
        <human value="If there's an offset, there must be a when (and not C, CM, CD, CV)"/> 
        <expression value="offset.empty() or (when.exists() and ((when in ('C' | 'CM' | 'CD' | 'CV')).not()))"/> 
        <xpath value="not(exists(f:offset)) or exists(f:when)"/> 
      </constraint> 
      <constraint> 
        <key value="tim-5"/> 
        <severity value="error"/> 
        <human value="period SHALL be a non-negative value"/> 
        <expression value="period.exists() implies period &gt;= 0"/> 
        <xpath value="f:period/@value &gt;= 0 or not(f:period/@value)"/> 
      </constraint> 
      <constraint> 
        <key value="tim-6"/> 
        <severity value="error"/> 
        <human value="If there's a periodMax, there must be a period"/> 
        <expression value="periodMax.empty() or period.exists()"/> 
        <xpath value="not(exists(f:periodMax)) or exists(f:period)"/> 
      </constraint> 
      <constraint> 
        <key value="tim-7"/> 
        <severity value="error"/> 
        <human value="If there's a durationMax, there must be a duration"/> 
        <expression value="durationMax.empty() or duration.exists()"/> 
        <xpath value="not(exists(f:durationMax)) or exists(f:duration)"/> 
      </constraint> 
      <constraint> 
        <key value="tim-8"/> 
        <severity value="error"/> 
        <human value="If there's a countMax, there must be a count"/> 
        <expression value="countMax.empty() or count.exists()"/> 
        <xpath value="not(exists(f:countMax)) or exists(f:count)"/> 
      </constraint> 
      <constraint> 
        <key value="tim-1"/> 
        <severity value="error"/> 
        <human value="if there's a duration, there needs to be duration units"/> 
        <expression value="duration.empty() or durationUnit.exists()"/> 
        <xpath value="not(exists(f:duration)) or exists(f:durationUnit)"/> 
      </constraint> 
      <constraint> 
        <key value="tim-10"/> 
        <severity value="error"/> 
        <human value="If there's a timeOfDay, there cannot be be a when, or vice versa"/> 
        <expression value="timeOfDay.empty() or when.empty()"/> 
        <xpath value="not(exists(f:timeOfDay)) or not(exists(f:when))"/> 
      </constraint> 
      <constraint> 
        <key value="tim-2"/> 
        <severity value="error"/> 
        <human value="if there's a period, there needs to be period units"/> 
        <expression value="period.empty() or periodUnit.exists()"/> 
        <xpath value="not(exists(f:period)) or exists(f:periodUnit)"/> 
      </constraint> 
      <constraint> 
        <key value="tim-4"/> 
        <severity value="error"/> 
        <human value="duration SHALL be a non-negative value"/> 
        <expression value="duration.exists() implies duration &gt;= 0"/> 
        <xpath value="f:duration/@value &gt;= 0 or not(f:duration/@value)"/> 
      </constraint> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="Implies PIVL or EIVL"/> 
      </mapping> 
    </element> 
    <element id="Timing.repeat.id">
      <path value="Timing.repeat.id"/> 
      <representation value="xmlAttr"/> 
      <short value="xml:id (or equivalent in JSON)"/> 
      <definition value="unique id for the element within a resource (for internal references). This may be any
       string value that does not contain spaces."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="Element.id"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="string"/> 
      </type> 
      <mapping> 
        <identity value="rim"/> 
        <map value="n/a"/> 
      </mapping> 
    </element> 
    <element id="Timing.repeat.extension">
      <path value="Timing.repeat.extension"/> 
      <slicing> 
        <discriminator> 
          <type value="value"/> 
          <path value="url"/> 
        </discriminator> 
        <description value="Extensions are always sliced by (at least) url"/> 
        <rules value="open"/> 
      </slicing> 
      <short value="Additional Content defined by implementations"/> 
      <definition value="May be used to represent additional information that is not part of the basic definition
       of the element. In order 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 is allowed to define an extension, there is a set of requirements that SHALL
       be met as part of the definition of the extension."/> 
      <comment value="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."/> 
      <alias value="extensions"/> 
      <alias value="user content"/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="Element.extension"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Extension"/> 
      </type> 
      <mapping> 
        <identity value="rim"/> 
        <map value="n/a"/> 
      </mapping> 
    </element> 
    <element id="Timing.repeat.bounds[x]">
      <path value="Timing.repeat.bounds[x]"/> 
      <short value="Length/Range of lengths, or (Start and/or end) limits"/> 
      <definition value="Either a duration for the length of the timing schedule, a range of possible length, or
       outer bounds for start and/or end limits of the timing schedule."/> 
      <min value="0"/> 
      <max value="1"/> 
      <type> 
        <code value="Duration"/> 
      </type> 
      <type> 
        <code value="Range"/> 
      </type> 
      <type> 
        <code value="Period"/> 
      </type> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="IVL(TS) used in a QSI"/> 
      </mapping> 
    </element> 
    <element id="Timing.repeat.count">
      <path value="Timing.repeat.count"/> 
      <short value="Number of times to repeat"/> 
      <definition value="A total count of the desired number of repetitions."/> 
      <comment value="If you have both bounds and count, then this should be understood as within the bounds
       period, until count times happens."/> 
      <requirements value="Repetitions may be limited by end time or total occurrences."/> 
      <min value="0"/> 
      <max value="1"/> 
      <type> 
        <code value="integer"/> 
      </type> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="PIVL.count"/> 
      </mapping> 
    </element> 
    <element id="Timing.repeat.countMax">
      <path value="Timing.repeat.countMax"/> 
      <short value="Maximum number of times to repeat"/> 
      <definition value="A maximum value for the count of the desired repetitions (e.g. do something 6-8 times)."/> 
      <min value="0"/> 
      <max value="1"/> 
      <type> 
        <code value="integer"/> 
      </type> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="PIVL.count"/> 
      </mapping> 
    </element> 
    <element id="Timing.repeat.duration">
      <path value="Timing.repeat.duration"/> 
      <short value="How long when it happens"/> 
      <definition value="How long this thing happens for when it happens."/> 
      <comment value="For some events the duration is part of the definition of the event (e.g. IV infusions,
       where the duration is implicit in the specified quantity and rate). For others, it's part
       of the timing specification (e.g. exercise)."/> 
      <requirements value="Some activities are not instantaneous and need to be maintained for a period of time."/> 
      <min value="0"/> 
      <max value="1"/> 
      <type> 
        <code value="decimal"/> 
      </type> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="PIVL.phase"/> 
      </mapping> 
    </element> 
    <element id="Timing.repeat.durationMax">
      <path value="Timing.repeat.durationMax"/> 
      <short value="How long when it happens (Max)"/> 
      <definition value="The upper limit of how long this thing happens for when it happens."/> 
      <comment value="For some events the duration is part of the definition of the event (e.g. IV infusions,
       where the duration is implicit in the specified quantity and rate). For others, it's part
       of the timing specification (e.g. exercise)."/> 
      <requirements value="Some activities are not instantaneous and need to be maintained for a period of time."/> 
      <min value="0"/> 
      <max value="1"/> 
      <type> 
        <code value="decimal"/> 
      </type> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="PIVL.phase"/> 
      </mapping> 
    </element> 
    <element id="Timing.repeat.durationUnit">
      <path value="Timing.repeat.durationUnit"/> 
      <short value="s | min | h | d | wk | mo | a - unit of time (UCUM)"/> 
      <definition value="The units of time for the duration, in UCUM units."/> 
      <min value="0"/> 
      <max value="1"/> 
      <type> 
        <code value="code"/> 
      </type> 
      <isSummary value="true"/> 
      <binding> 
        <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
          <valueString value="UnitsOfTime"/> 
        </extension> 
        <strength value="required"/> 
        <description value="A unit of time (units from UCUM)."/> 
        <valueSetReference> 
          <reference value="http://hl7.org/fhir/ValueSet/units-of-time"/> 
        </valueSetReference> 
      </binding> 
      <mapping> 
        <identity value="rim"/> 
        <map value="PIVL.phase.unit"/> 
      </mapping> 
    </element> 
    <element id="Timing.repeat.frequency">
      <path value="Timing.repeat.frequency"/> 
      <short value="Event occurs frequency times per period"/> 
      <definition value="The number of times to repeat the action within the specified period / period range (i.e.
       both period and periodMax provided)."/> 
      <min value="0"/> 
      <max value="1"/> 
      <type> 
        <code value="integer"/> 
      </type> 
      <defaultValueInteger value="1"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="PIVL.phase"/> 
      </mapping> 
    </element> 
    <element id="Timing.repeat.frequencyMax">
      <path value="Timing.repeat.frequencyMax"/> 
      <short value="Event occurs up to frequencyMax times per period"/> 
      <definition value="If present, indicates that the frequency is a range - so to repeat between [frequency]
       and [frequencyMax] times within the period or period range."/> 
      <min value="0"/> 
      <max value="1"/> 
      <type> 
        <code value="integer"/> 
      </type> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="PIVL.phase"/> 
      </mapping> 
    </element> 
    <element id="Timing.repeat.period">
      <path value="Timing.repeat.period"/> 
      <short value="Event occurs frequency times per period"/> 
      <definition value="Indicates the duration of time over which repetitions are to occur; e.g. to express &quot;3
       times per day&quot;, 3 would be the frequency and &quot;1 day&quot; would be the period."/> 
      <min value="0"/> 
      <max value="1"/> 
      <type> 
        <code value="decimal"/> 
      </type> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="PIVL.phase"/> 
      </mapping> 
    </element> 
    <element id="Timing.repeat.periodMax">
      <path value="Timing.repeat.periodMax"/> 
      <short value="Upper limit of period (3-4 hours)"/> 
      <definition value="If present, indicates that the period is a range from [period] to [periodMax], allowing
       expressing concepts such as &quot;do this once every 3-5 days."/> 
      <min value="0"/> 
      <max value="1"/> 
      <type> 
        <code value="decimal"/> 
      </type> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="PIVL.phase"/> 
      </mapping> 
    </element> 
    <element id="Timing.repeat.periodUnit">
      <path value="Timing.repeat.periodUnit"/> 
      <short value="s | min | h | d | wk | mo | a - unit of time (UCUM)"/> 
      <definition value="The units of time for the period in UCUM units."/> 
      <min value="0"/> 
      <max value="1"/> 
      <type> 
        <code value="code"/> 
      </type> 
      <isSummary value="true"/> 
      <binding> 
        <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
          <valueString value="UnitsOfTime"/> 
        </extension> 
        <strength value="required"/> 
        <description value="A unit of time (units from UCUM)."/> 
        <valueSetReference> 
          <reference value="http://hl7.org/fhir/ValueSet/units-of-time"/> 
        </valueSetReference> 
      </binding> 
      <mapping> 
        <identity value="rim"/> 
        <map value="PIVL.phase.unit"/> 
      </mapping> 
    </element> 
    <element id="Timing.repeat.dayOfWeek">
      <path value="Timing.repeat.dayOfWeek"/> 
      <short value="mon | tue | wed | thu | fri | sat | sun"/> 
      <definition value="If one or more days of week is provided, then the action happens only on the specified
       day(s)."/> 
      <comment value="If no days are specified, the action is assumed to happen every day as otherwise specified.
       The elements frequency and period cannot be used as well as dayOfWeek."/> 
      <min value="0"/> 
      <max value="*"/> 
      <type> 
        <code value="code"/> 
      </type> 
      <isSummary value="true"/> 
      <binding> 
        <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
          <valueString value="DayOfWeek"/> 
        </extension> 
        <strength value="required"/> 
        <valueSetReference> 
          <reference value="http://hl7.org/fhir/ValueSet/days-of-week"/> 
        </valueSetReference> 
      </binding> 
      <mapping> 
        <identity value="rim"/> 
        <map value="n/a"/> 
      </mapping> 
    </element> 
    <element id="Timing.repeat.timeOfDay">
      <path value="Timing.repeat.timeOfDay"/> 
      <short value="Time of day for action"/> 
      <definition value="Specified time of day for action to take place."/> 
      <comment value="When time of day is specified, it is inferred that the action happens every day (as filtered
       by dayofWeek) on the specified times. The elements when, frequency and period cannot be
       used as well as timeOfDay."/> 
      <min value="0"/> 
      <max value="*"/> 
      <type> 
        <code value="time"/> 
      </type> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="n/a"/> 
      </mapping> 
    </element> 
    <element id="Timing.repeat.when">
      <path value="Timing.repeat.when"/> 
      <short value="Regular life events the event is tied to"/> 
      <definition value="Real world events that the occurrence of the event should be tied to."/> 
      <comment value="When more than one event is listed, the event is tied to the union of the specified events."/> 
      <requirements value="Timings are frequently determined by occurrences such as waking, eating and sleep."/> 
      <min value="0"/> 
      <max value="*"/> 
      <type> 
        <code value="code"/> 
      </type> 
      <isSummary value="true"/> 
      <binding> 
        <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
          <valueString value="EventTiming"/> 
        </extension> 
        <strength value="required"/> 
        <description value="Real world event relating to the schedule."/> 
        <valueSetReference> 
          <reference value="http://hl7.org/fhir/ValueSet/event-timing"/> 
        </valueSetReference> 
      </binding> 
      <mapping> 
        <identity value="rim"/> 
        <map value="EIVL.event"/> 
      </mapping> 
    </element> 
    <element id="Timing.repeat.offset">
      <path value="Timing.repeat.offset"/> 
      <short value="Minutes from event (before or after)"/> 
      <definition value="The number of minutes from the event. If the event code does not indicate whether the
       minutes is before or after the event, then the offset is assumed to be after the event."/> 
      <min value="0"/> 
      <max value="1"/> 
      <type> 
        <code value="unsignedInt"/> 
      </type> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="EIVL.offset"/> 
      </mapping> 
    </element> 
    <element id="Timing.code">
      <path value="Timing.code"/> 
      <short value="BID | TID | QID | AM | PM | QD | QOD | Q4H | Q6H +"/> 
      <definition value="A code for the timing schedule. Some codes such as BID are ubiquitous, but many institutions
       define their own additional codes. If a code is provided, the code is understood to be
       a complete statement of whatever is specified in the structured timing data, and either
       the code or the data may be used to interpret the Timing, with the exception that .repeat.bounds
       still applies over the code (and is not contained in the code)."/> 
      <comment value="BID etc are defined as 'at institutionally specified times'. For example, an institution
       may choose that BID is &quot;always at 7am and 6pm&quot;.  If it is inappropriate for
       this choice to be made, the code BID should not be used. Instead, a distinct organization-specific
       code should be used in place of the HL7-defined BID code and/or the a structured representation
       should be used (in this case, specifying the two event times)."/> 
      <min value="0"/> 
      <max value="1"/> 
      <type> 
        <code value="CodeableConcept"/> 
      </type> 
      <isSummary value="true"/> 
      <binding> 
        <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
          <valueString value="TimingAbbreviation"/> 
        </extension> 
        <strength value="preferred"/> 
        <description value="Code for a known / defined timing pattern."/> 
        <valueSetReference> 
          <reference value="http://hl7.org/fhir/ValueSet/timing-abbreviation"/> 
        </valueSetReference> 
      </binding> 
      <mapping> 
        <identity value="rim"/> 
        <map value="QSC.code"/> 
      </mapping> 
    </element> 
  </snapshot> 
  <differential> 
    <element id="Timing">
      <path value="Timing"/> 
      <short value="A timing schedule that specifies an event that may occur multiple times"/> 
      <definition value="Specifies an event that may occur multiple times. Timing schedules are used to record
       when things are planned, expected or requested to occur. The most common usage is in dosage
       instructions for medications. They are also used when planning care of various kinds,
       and may be used for reporting the schedule to which past regular activities were carried
       out."/> 
      <comment value="A timing schedule can be either a list of events - intervals on which the event occurs,
       or a single event with repeating criteria or just repeating criteria with no actual event.
        When both event and a repeating specification are provided, the list of events should
       be understood as an interpretation of the information in the repeat structure."/> 
      <min value="0"/> 
      <max value="*"/> 
      <mapping> 
        <identity value="v2"/> 
        <map value="N/A"/> 
      </mapping> 
      <mapping> 
        <identity value="rim"/> 
        <map value="QSET&lt;TS&gt; (GTS)"/> 
      </mapping> 
    </element> 
    <element id="Timing.event">
      <path value="Timing.event"/> 
      <short value="When the event occurs"/> 
      <definition value="Identifies specific times when the event occurs."/> 
      <requirements value="In an MAR, for instance, you need to take a general specification, and turn it into a
       precise specification."/> 
      <min value="0"/> 
      <max value="*"/> 
      <type> 
        <code value="dateTime"/> 
      </type> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="QLIST&lt;TS&gt;"/> 
      </mapping> 
    </element> 
    <element id="Timing.repeat">
      <path value="Timing.repeat"/> 
      <short value="When the event is to occur"/> 
      <definition value="A set of rules that describe when the event is scheduled."/> 
      <requirements value="Many timing schedules are determined by regular repetitions."/> 
      <min value="0"/> 
      <max value="1"/> 
      <type> 
        <code value="Element"/> 
      </type> 
      <constraint> 
        <key value="tim-9"/> 
        <severity value="error"/> 
        <human value="If there's an offset, there must be a when (and not C, CM, CD, CV)"/> 
        <expression value="offset.empty() or (when.exists() and ((when in ('C' | 'CM' | 'CD' | 'CV')).not()))"/> 
        <xpath value="not(exists(f:offset)) or exists(f:when)"/> 
      </constraint> 
      <constraint> 
        <key value="tim-5"/> 
        <severity value="error"/> 
        <human value="period SHALL be a non-negative value"/> 
        <expression value="period.exists() implies period &gt;= 0"/> 
        <xpath value="f:period/@value &gt;= 0 or not(f:period/@value)"/> 
      </constraint> 
      <constraint> 
        <key value="tim-6"/> 
        <severity value="error"/> 
        <human value="If there's a periodMax, there must be a period"/> 
        <expression value="periodMax.empty() or period.exists()"/> 
        <xpath value="not(exists(f:periodMax)) or exists(f:period)"/> 
      </constraint> 
      <constraint> 
        <key value="tim-7"/> 
        <severity value="error"/> 
        <human value="If there's a durationMax, there must be a duration"/> 
        <expression value="durationMax.empty() or duration.exists()"/> 
        <xpath value="not(exists(f:durationMax)) or exists(f:duration)"/> 
      </constraint> 
      <constraint> 
        <key value="tim-8"/> 
        <severity value="error"/> 
        <human value="If there's a countMax, there must be a count"/> 
        <expression value="countMax.empty() or count.exists()"/> 
        <xpath value="not(exists(f:countMax)) or exists(f:count)"/> 
      </constraint> 
      <constraint> 
        <key value="tim-1"/> 
        <severity value="error"/> 
        <human value="if there's a duration, there needs to be duration units"/> 
        <expression value="duration.empty() or durationUnit.exists()"/> 
        <xpath value="not(exists(f:duration)) or exists(f:durationUnit)"/> 
      </constraint> 
      <constraint> 
        <key value="tim-10"/> 
        <severity value="error"/> 
        <human value="If there's a timeOfDay, there cannot be be a when, or vice versa"/> 
        <expression value="timeOfDay.empty() or when.empty()"/> 
        <xpath value="not(exists(f:timeOfDay)) or not(exists(f:when))"/> 
      </constraint> 
      <constraint> 
        <key value="tim-2"/> 
        <severity value="error"/> 
        <human value="if there's a period, there needs to be period units"/> 
        <expression value="period.empty() or periodUnit.exists()"/> 
        <xpath value="not(exists(f:period)) or exists(f:periodUnit)"/> 
      </constraint> 
      <constraint> 
        <key value="tim-4"/> 
        <severity value="error"/> 
        <human value="duration SHALL be a non-negative value"/> 
        <expression value="duration.exists() implies duration &gt;= 0"/> 
        <xpath value="f:duration/@value &gt;= 0 or not(f:duration/@value)"/> 
      </constraint> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="Implies PIVL or EIVL"/> 
      </mapping> 
    </element> 
    <element id="Timing.repeat.bounds[x]">
      <path value="Timing.repeat.bounds[x]"/> 
      <short value="Length/Range of lengths, or (Start and/or end) limits"/> 
      <definition value="Either a duration for the length of the timing schedule, a range of possible length, or
       outer bounds for start and/or end limits of the timing schedule."/> 
      <min value="0"/> 
      <max value="1"/> 
      <type> 
        <code value="Duration"/> 
      </type> 
      <type> 
        <code value="Range"/> 
      </type> 
      <type> 
        <code value="Period"/> 
      </type> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="IVL(TS) used in a QSI"/> 
      </mapping> 
    </element> 
    <element id="Timing.repeat.count">
      <path value="Timing.repeat.count"/> 
      <short value="Number of times to repeat"/> 
      <definition value="A total count of the desired number of repetitions."/> 
      <comment value="If you have both bounds and count, then this should be understood as within the bounds
       period, until count times happens."/> 
      <requirements value="Repetitions may be limited by end time or total occurrences."/> 
      <min value="0"/> 
      <max value="1"/> 
      <type> 
        <code value="integer"/> 
      </type> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="PIVL.count"/> 
      </mapping> 
    </element> 
    <element id="Timing.repeat.countMax">
      <path value="Timing.repeat.countMax"/> 
      <short value="Maximum number of times to repeat"/> 
      <definition value="A maximum value for the count of the desired repetitions (e.g. do something 6-8 times)."/> 
      <min value="0"/> 
      <max value="1"/> 
      <type> 
        <code value="integer"/> 
      </type> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="PIVL.count"/> 
      </mapping> 
    </element> 
    <element id="Timing.repeat.duration">
      <path value="Timing.repeat.duration"/> 
      <short value="How long when it happens"/> 
      <definition value="How long this thing happens for when it happens."/> 
      <comment value="For some events the duration is part of the definition of the event (e.g. IV infusions,
       where the duration is implicit in the specified quantity and rate). For others, it's part
       of the timing specification (e.g. exercise)."/> 
      <requirements value="Some activities are not instantaneous and need to be maintained for a period of time."/> 
      <min value="0"/> 
      <max value="1"/> 
      <type> 
        <code value="decimal"/> 
      </type> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="PIVL.phase"/> 
      </mapping> 
    </element> 
    <element id="Timing.repeat.durationMax">
      <path value="Timing.repeat.durationMax"/> 
      <short value="How long when it happens (Max)"/> 
      <definition value="The upper limit of how long this thing happens for when it happens."/> 
      <comment value="For some events the duration is part of the definition of the event (e.g. IV infusions,
       where the duration is implicit in the specified quantity and rate). For others, it's part
       of the timing specification (e.g. exercise)."/> 
      <requirements value="Some activities are not instantaneous and need to be maintained for a period of time."/> 
      <min value="0"/> 
      <max value="1"/> 
      <type> 
        <code value="decimal"/> 
      </type> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="PIVL.phase"/> 
      </mapping> 
    </element> 
    <element id="Timing.repeat.durationUnit">
      <path value="Timing.repeat.durationUnit"/> 
      <short value="s | min | h | d | wk | mo | a - unit of time (UCUM)"/> 
      <definition value="The units of time for the duration, in UCUM units."/> 
      <min value="0"/> 
      <max value="1"/> 
      <type> 
        <code value="code"/> 
      </type> 
      <isSummary value="true"/> 
      <binding> 
        <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
          <valueString value="UnitsOfTime"/> 
        </extension> 
        <strength value="required"/> 
        <description value="A unit of time (units from UCUM)."/> 
        <valueSetReference> 
          <reference value="http://hl7.org/fhir/ValueSet/units-of-time"/> 
        </valueSetReference> 
      </binding> 
      <mapping> 
        <identity value="rim"/> 
        <map value="PIVL.phase.unit"/> 
      </mapping> 
    </element> 
    <element id="Timing.repeat.frequency">
      <path value="Timing.repeat.frequency"/> 
      <short value="Event occurs frequency times per period"/> 
      <definition value="The number of times to repeat the action within the specified period / period range (i.e.
       both period and periodMax provided)."/> 
      <min value="0"/> 
      <max value="1"/> 
      <type> 
        <code value="integer"/> 
      </type> 
      <defaultValueInteger value="1"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="PIVL.phase"/> 
      </mapping> 
    </element> 
    <element id="Timing.repeat.frequencyMax">
      <path value="Timing.repeat.frequencyMax"/> 
      <short value="Event occurs up to frequencyMax times per period"/> 
      <definition value="If present, indicates that the frequency is a range - so to repeat between [frequency]
       and [frequencyMax] times within the period or period range."/> 
      <min value="0"/> 
      <max value="1"/> 
      <type> 
        <code value="integer"/> 
      </type> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="PIVL.phase"/> 
      </mapping> 
    </element> 
    <element id="Timing.repeat.period">
      <path value="Timing.repeat.period"/> 
      <short value="Event occurs frequency times per period"/> 
      <definition value="Indicates the duration of time over which repetitions are to occur; e.g. to express &quot;3
       times per day&quot;, 3 would be the frequency and &quot;1 day&quot; would be the period."/> 
      <min value="0"/> 
      <max value="1"/> 
      <type> 
        <code value="decimal"/> 
      </type> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="PIVL.phase"/> 
      </mapping> 
    </element> 
    <element id="Timing.repeat.periodMax">
      <path value="Timing.repeat.periodMax"/> 
      <short value="Upper limit of period (3-4 hours)"/> 
      <definition value="If present, indicates that the period is a range from [period] to [periodMax], allowing
       expressing concepts such as &quot;do this once every 3-5 days."/> 
      <min value="0"/> 
      <max value="1"/> 
      <type> 
        <code value="decimal"/> 
      </type> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="PIVL.phase"/> 
      </mapping> 
    </element> 
    <element id="Timing.repeat.periodUnit">
      <path value="Timing.repeat.periodUnit"/> 
      <short value="s | min | h | d | wk | mo | a - unit of time (UCUM)"/> 
      <definition value="The units of time for the period in UCUM units."/> 
      <min value="0"/> 
      <max value="1"/> 
      <type> 
        <code value="code"/> 
      </type> 
      <isSummary value="true"/> 
      <binding> 
        <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
          <valueString value="UnitsOfTime"/> 
        </extension> 
        <strength value="required"/> 
        <description value="A unit of time (units from UCUM)."/> 
        <valueSetReference> 
          <reference value="http://hl7.org/fhir/ValueSet/units-of-time"/> 
        </valueSetReference> 
      </binding> 
      <mapping> 
        <identity value="rim"/> 
        <map value="PIVL.phase.unit"/> 
      </mapping> 
    </element> 
    <element id="Timing.repeat.dayOfWeek">
      <path value="Timing.repeat.dayOfWeek"/> 
      <short value="mon | tue | wed | thu | fri | sat | sun"/> 
      <definition value="If one or more days of week is provided, then the action happens only on the specified
       day(s)."/> 
      <comment value="If no days are specified, the action is assumed to happen every day as otherwise specified.
       The elements frequency and period cannot be used as well as dayOfWeek."/> 
      <min value="0"/> 
      <max value="*"/> 
      <type> 
        <code value="code"/> 
      </type> 
      <isSummary value="true"/> 
      <binding> 
        <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
          <valueString value="DayOfWeek"/> 
        </extension> 
        <strength value="required"/> 
        <valueSetReference> 
          <reference value="http://hl7.org/fhir/ValueSet/days-of-week"/> 
        </valueSetReference> 
      </binding> 
      <mapping> 
        <identity value="rim"/> 
        <map value="n/a"/> 
      </mapping> 
    </element> 
    <element id="Timing.repeat.timeOfDay">
      <path value="Timing.repeat.timeOfDay"/> 
      <short value="Time of day for action"/> 
      <definition value="Specified time of day for action to take place."/> 
      <comment value="When time of day is specified, it is inferred that the action happens every day (as filtered
       by dayofWeek) on the specified times. The elements when, frequency and period cannot be
       used as well as timeOfDay."/> 
      <min value="0"/> 
      <max value="*"/> 
      <type> 
        <code value="time"/> 
      </type> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="n/a"/> 
      </mapping> 
    </element> 
    <element id="Timing.repeat.when">
      <path value="Timing.repeat.when"/> 
      <short value="Regular life events the event is tied to"/> 
      <definition value="Real world events that the occurrence of the event should be tied to."/> 
      <comment value="When more than one event is listed, the event is tied to the union of the specified events."/> 
      <requirements value="Timings are frequently determined by occurrences such as waking, eating and sleep."/> 
      <min value="0"/> 
      <max value="*"/> 
      <type> 
        <code value="code"/> 
      </type> 
      <isSummary value="true"/> 
      <binding> 
        <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
          <valueString value="EventTiming"/> 
        </extension> 
        <strength value="required"/> 
        <description value="Real world event relating to the schedule."/> 
        <valueSetReference> 
          <reference value="http://hl7.org/fhir/ValueSet/event-timing"/> 
        </valueSetReference> 
      </binding> 
      <mapping> 
        <identity value="rim"/> 
        <map value="EIVL.event"/> 
      </mapping> 
    </element> 
    <element id="Timing.repeat.offset">
      <path value="Timing.repeat.offset"/> 
      <short value="Minutes from event (before or after)"/> 
      <definition value="The number of minutes from the event. If the event code does not indicate whether the
       minutes is before or after the event, then the offset is assumed to be after the event."/> 
      <min value="0"/> 
      <max value="1"/> 
      <type> 
        <code value="unsignedInt"/> 
      </type> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="EIVL.offset"/> 
      </mapping> 
    </element> 
    <element id="Timing.code">
      <path value="Timing.code"/> 
      <short value="BID | TID | QID | AM | PM | QD | QOD | Q4H | Q6H +"/> 
      <definition value="A code for the timing schedule. Some codes such as BID are ubiquitous, but many institutions
       define their own additional codes. If a code is provided, the code is understood to be
       a complete statement of whatever is specified in the structured timing data, and either
       the code or the data may be used to interpret the Timing, with the exception that .repeat.bounds
       still applies over the code (and is not contained in the code)."/> 
      <comment value="BID etc are defined as 'at institutionally specified times'. For example, an institution
       may choose that BID is &quot;always at 7am and 6pm&quot;.  If it is inappropriate for
       this choice to be made, the code BID should not be used. Instead, a distinct organization-specific
       code should be used in place of the HL7-defined BID code and/or the a structured representation
       should be used (in this case, specifying the two event times)."/> 
      <min value="0"/> 
      <max value="1"/> 
      <type> 
        <code value="CodeableConcept"/> 
      </type> 
      <isSummary value="true"/> 
      <binding> 
        <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
          <valueString value="TimingAbbreviation"/> 
        </extension> 
        <strength value="preferred"/> 
        <description value="Code for a known / defined timing pattern."/> 
        <valueSetReference> 
          <reference value="http://hl7.org/fhir/ValueSet/timing-abbreviation"/> 
        </valueSetReference> 
      </binding> 
      <mapping> 
        <identity value="rim"/> 
        <map value="QSC.code"/> 
      </mapping> 
    </element> 
  </differential> 
</StructureDefinition> 

Usage note: every effort has been made to ensure that the examples are correct and useful, but they are not a normative part of the specification.