<?xml version="1.0" encoding="UTF-8"?>
<sml:PhysicalSystem gml:id="MY_SENSOR"
xmlns:sml="http://www.opengis.net/sensorml/2.0"
xmlns:swe="http://www.opengis.net/swe/2.0"
xmlns:gml="http://www.opengis.net/gml/3.2"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xlink="http://www.w3.org/1999/xlink"
xsi:schemaLocation="http://www.opengis.net/sensorml/2.0 http://schemas.opengis.net/sensorml/2.0/sensorML.xsd">
   <!-- ================================================= -->
   <!--                  System Description               -->
   <!-- ================================================= -->
   <gml:description>simple thermometer with time tag</gml:description>
   <gml:identifier codeSpace="uid">urn:meteofrance:stations:76455</gml:identifier>
 
   <!-- metadata deleted for brevity sake -->
 
   <!-- ================================================= -->
   <!--             Observed Property = Output            -->
   <!-- ================================================= -->
   <sml:outputs>
      <sml:OutputList>
         <sml:output name="temp">
            <!-- This stream is for a sensor network where 2 output structures are possible -->
            <!-- location of sensors is not provided but can be accessed from describeSensor
                    or a database using sensor IDs-->
            <sml:DataInterface>
               <sml:data>
                  <swe:DataStream>
                     <swe:elementType name="messageStream">
                        <swe:DataChoice>
                         
                        <!-- first item supports all weather variables -->
                        <swe:item name="ALL">
                           <swe:DataRecord>
                              <swe:label>Atmospheric Conditions</swe:label>
                              <swe:field name="time">
                                 <swe:Time definition="http://sensorml.com/ont/swe/property/SamplingTime">
                                    <swe:uom xlink:href="http://www.opengis.net/def/uom/ISO-8601/0/Gregorian"/>
                                 </swe:Time>
                              </swe:field>
                              <swe:field name="sensorID">
                                 <swe:Text definition="http://sensorml.com/ont/swe/property/sensorUID"/>
                              </swe:field>
                              <swe:field name="temp">
                                 <swe:Quantity definition="http://mmisw.org/ont/cf/parameter/air_temperature">
                                    <swe:uom code="Cel"/>
                                 </swe:Quantity>
                              </swe:field>
                              <swe:field name="pressure">
                                 <swe:Quantity definition="http://mmisw.org/ont/cf/parameter/barometric_pressure">
                                    <swe:uom code="kPa"/>
                                 </swe:Quantity>
                              </swe:field>
                              <swe:field name="wind_speed">
                                 <swe:Quantity definition="http://mmisw.org/ont/cf/parameter/wind_speed">
                                    <swe:uom code="km/h"/>
                                 </swe:Quantity>
                              </swe:field>
                              <swe:field name="wind_dir">
                                 <swe:Quantity definition="http://mmisw.org/ont/cf/parameter/wind_to_direction">
                                    <swe:uom code="deg"/>
                                 </swe:Quantity>
                              </swe:field>
                           </swe:DataRecord>
                        </swe:item>
                         
                        <!-- second item supports only temperature -->
                        <swe:item name="TEMP">
                           <swe:DataRecord>
                              <swe:label>Temperature</swe:label>
                              <swe:field name="time">
                                 <swe:Time definition="http://sensorml.com/ont/swe/property/SamplingTime">
                                    <swe:uom xlink:href="http://www.opengis.net/def/uom/ISO-8601/0/Gregorian"/>
                                 </swe:Time>
                              </swe:field>
                              <swe:field name="sensorID">
                                 <swe:Text definition="http://sensorml.com/ont/swe/property/sensorUID"/>
                              </swe:field>
                              <swe:field name="temp">
                                 <swe:Quantity definition="http://mmisw.org/ont/cf/parameter/air_temperature">
                                    <swe:uom code="Cel"/>
                                 </swe:Quantity>
                              </swe:field>
                           </swe:DataRecord>
                        </swe:item>
                         
                     </swe:DataChoice>
                     </swe:elementType>
                     <swe:encoding>
                        <swe:TextEncoding tokenSeparator="," blockSeparator=""/>
                     </swe:encoding>
                     <swe:values xlink:href="rtp://mySensors.com:4356/net"/>
                  </swe:DataStream>
               </sml:data>
            </sml:DataInterface>
         </sml:output>
      </sml:OutputList>
   </sml:outputs>
</sml:PhysicalSystem>