<?xml version=“1.0” encoding=“UTF-8”?><Observation xmlns=“hl7.org/fhir”>

    <id value="example"/>
    <!--    the mandatory quality flags:    -->
    <text><status value="generated"/><div xmlns="http://www.w3.org/1999/xhtml"><p><b>Generated Narrative with Details</b></p><p><b>id</b>: example</p><p><b>status</b>: final</p><p><b>category</b>: Vital Signs <span>(Details : {http://hl7.org/fhir/observation-category code &#39;vital-signs&#39; = &#39;Vital Signs&#39;, given as &#39;Vital Signs&#39;})</span></p><p><b>code</b>: Weight Measured <span>(Details : {LOINC code &#39;3141-9&#39; = &#39;Body weight Measured&#39;, given as &#39;Weight Measured&#39;}; {SNOMED CT code &#39;27113001&#39; = &#39;27113001&#39;, given as &#39;Body weight&#39;}; {http://acme.org/devices/clinical-codes code &#39;body-weight&#39; = &#39;??&#39;, given as &#39;Body Weight&#39;})</span></p><p><b>subject</b>: <a>Patient/example</a></p><p><b>encounter</b>: <a>Encounter/example</a></p><p><b>value</b>: 185 lbs<span> (Details: http://unitsofmeasure.org code [lb_av] = &#39;??&#39;)</span></p></div></text><status value="final"/>
    <!--   category code is A code that classifies the general type of observation being made. This is used for searching, sorting and display purposes.  -->
    <category>
            <coding>
                    <system value="http://hl7.org/fhir/observation-category"/>
                    <code value="vital-signs"/>
                    <display value="Vital Signs"/>
            </coding>
    </category>
    <!--   
Observations are often coded in multiple code systems.
  - LOINC provides a very specific code (though not usefully more specific in this particular case)
  - snomed provides a clinically relevant code that is usually less granular than LOINC
  - the source system provides its own code, which may be less or more granular than LOINC
 -->
    <code>
            <!--    LOINC - always recommended to have a LOINC code    -->
            <coding>
                    <system value="http://loinc.org"/>
                    <code value="3141-9"/>
                    <display value="Weight Measured"/>
            </coding>
            <!--    SNOMED CT Codes - becoming more common    -->
            <coding>
                    <system value="http://snomed.info/sct"/>
                    <code value="27113001"/>
                    <display value="Body weight"/>
            </coding>
            <!--    Also, a local code specific to the source system    -->
            <coding>
                    <system value="http://acme.org/devices/clinical-codes"/>
                    <code value="body-weight"/>
                    <display value="Body Weight"/>
            </coding>
    </code>
    <subject>
            <reference value="Patient/example"/>
    </subject>
    <encounter>
            <reference value="Encounter/example"/>
    </encounter>
    <!--    In FHIR, units may be represented twice. Once in the
agreed human representation, and once in a coded form.
Both is best, since it's not always possible to infer
one from the other in code.

When a computable unit is provided, UCUM (http://unitsofmeasure.org)
is always preferred, but it doesn't provide notional units (such as
"tablet"), etc. For these, something else is required (e.g. SNOMED CT)
  -->
    <valueQuantity>
            <value value="185"/>
            <unit value="lbs"/>
            <system value="http://unitsofmeasure.org"/>
            <code value="[lb_av]"/>
    </valueQuantity>

</Observation>