Deprecation Notice - This guidance was deprecated by IOOS on 2020-01-10 and is superceded by the IOOS Metadata Profile 1.2. Please read the Deprecation Notice below for more information. Original Summary - Template for a SWE Data Record's static and dynamic fields for multiple stations with multiple sensors including quality elements for some quantities
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Deprecation Notice
Notice: This convention has been deprecated due to IOOS’ transition from the OGC SOS/SWE suite of standards to ERDDAP for in situ data dissemination.
All relevant guidance in this standard has been superceded as of the 2020-01-10 publication date of the IOOS Metadata Profile 1.2. Please refer to the IOOS Metadata Profile for current guidance.
The information below is retained for historical reference purposes only.
<?xml version="1.0" encoding="UTF-8"?>
<!-- This template is an example of a SWE Data Record composed of static and dynamic fields for -->
<!-- multiple stations with multiple sensors including quality elements for some quantities. -->
<!-- -->
<!-- This template is almost identical to the SWE-Multisation-TimeSeries with the addition of some -->
<!-- quality elements. Quality flags for static and dynamic data are included for station1 sensor 1.-->
<!-- An example of NilValue is also provided for wind speed in station 1 sensor 1 -->
<!-- -->
<!-- Most any element may be static or dynamic, but the static fields must be encoded inline, while -->
<!-- The dyamic elements must be block encoded in the data array. -->
<!-- -->
<!-- Description of data -->
<!-- SWE DataRecord containing 3 Stations: -->
<!-- Station 1 has 2 sensors -->
<!-- Station 2 has 2 sensors -->
<!-- Station 3 has 1 sensors -->
<swe2:DataRecord
xmlns:swe2="http://www.opengis.net/swe/2.0"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.opengis.net/swe/2.0 http://schemas.opengis.net/sweCommon/2.0/swe.xsd"
definition="http://mmisw.org/ont/ioos/swe_element_type/observationRecord">
<!-- STATIC DATA -->
<!-- This field "stations" contains static data for all stations and sensors in the response -->
<!-- Static data is linked to dynamic data (sensor observation values) via an abbreviated, -->
<!-- underscored sensor URN. For example, urn:ioos:sensor:wmo:41001:sensor1 becomes -->
<!-- wmo_41001_sensor1 -->
<!-- This abbreviated URN is used as the sensor's DataRecord id in the static block and the -->
<!-- DataChoice item name in the dynamic block. Consequently it also appears in the dynamic -->
<!-- swe:values encoding. And may thus be used as a look up for the metadata of a given row -->
<!-- of the data block -->
<!-- All fields in the static block must include inline values. -->
<!-- All fields in the dynamic block must not include inline values. -->
<swe2:field name="stations">
<!-- IoosTech Convention: -->
<!-- The data record containing the static data for each station shall be defined -->
<swe2:DataRecord definition="http://mmisw.org/ont/ioos/swe_element_type/stations">
<!-- Static data for the first station, urn:ioos:station:wmo:41001 -->
<!-- Required elements include for each station: stationID, platformLocation, sensors -->
<swe2:field name="wmo_41001">
<!-- IoosTech Convention: -->
<!-- The data record containing the static data for a station shall be defined -->
<swe2:DataRecord id="wmo_41001"
definition="http://mmisw.org/ont/ioos/swe_element_type/station">
<swe2:field name="stationID">
<!-- IoosTech Convention: -->
<!-- The text element containing the station id shall be defined -->
<swe2:Text definition="http://mmisw.org/ont/ioos/definition/stationID">
<swe2:quality>
<!-- Optional element can contain any valid static quality element for this station -->
</swe2:quality>
<swe2:value>urn:ioos:station:wmo:41001</swe2:value>
</swe2:Text>
</swe2:field>
<!-- The platformLocation may be defined here, statically, or specified in the dynamic -->
<!-- section. In either case, all coordinates must be specified inline or block encoded. -->
<!-- They encoding can not be split to save bandwidth in the response. -->
<swe2:field name="platformLocation">
<!-- Field: platformLocation; -->
<!-- The location of the platform relative to WGS 84 (Horizontal) and Instantaneous Water Level (Vertical). -->
<!-- Each sensor will specify a height relative to the platform location. If complete orientation and -->
<!-- relative position are available for a sensor, SWE 2.0 clearly defines how to record it. Generally, -->
<!-- for IOOS buoy instruments we believe just specifying the height is the appropriate solution. -->
<swe2:Vector definition="http://www.opengis.net/def/property/OGC/0/PlatformLocation"
referenceFrame="http://www.opengis.net/def/crs-compound?1=http://www.opengis.net/def/crs/EPSG/0/4326&2=http://www.opengis.net/def/crs/EPSG/0/5829"
localFrame="#wmo_41001_frame">
<!-- Vector: -->
<!-- The coordinate vector defining the station location in the specified reference frame. -->
<!-- -->
<!-- For floating, surface buoys a new compound coordinate reference system has been developed -->
<!-- which combines the WGS84 for horizontal (GPS) latitude and longitude CRS with a vertical CRS -->
<!-- which uses height in above the Instantanious Water Level as a datum. -->
<!-- -->
<!-- For a tide gauge or a station at a fixed location relative to the Geoid (MSL), the CRS should be: -->
<!-- EPSG::4979 referenceFrame="http://www.opengis.net/def/crs/EPSG/0/4979" -->
<!-- -->
<!-- Each stations localFrame must be unique. -->
<swe2:coordinate name="latitude">
<swe2:Quantity definition="http://mmisw.org/ont/cf/parameter/latitude" axisID="Lat">
<swe2:uom code="deg" />
<swe2:value>32.382</swe2:value>
</swe2:Quantity>
</swe2:coordinate>
<swe2:coordinate name="longitude">
<swe2:Quantity definition="http://mmisw.org/ont/cf/parameter/longitude" axisID="Lon">
<swe2:uom code="deg" />
<swe2:value>-75.415</swe2:value>
</swe2:Quantity>
</swe2:coordinate>
<swe2:coordinate name="height">
<swe2:Quantity definition="http://mmisw.org/ont/cf/parameter/height" axisID="Z">
<swe2:uom code="m" />
<swe2:value>0.5</swe2:value>
<!-- Zero height is at water level in the IOOS Buoy CRS. All sensors locations should be a height -->
<!-- (vertical upward) relative to this reference frame -->
</swe2:Quantity>
</swe2:coordinate>
</swe2:Vector>
</swe2:field>
<!-- Static data for all sensors on this station -->
<swe2:field name="sensors">
<!-- IoosTech Convention: -->
<!-- The data record containing the static data for each sensor shall be defined -->
<swe2:DataRecord definition="http://mmisw.org/ont/ioos/swe_element_type/sensors">
<swe2:field name="wmo_41001_sensor1">
<!-- IoosTech Convention: -->
<!-- The data record containing the static data for a sensor shall be defined -->
<!-- Reminder: the DataRecord id of a sensor in the static block matches the DataChoice item -->
<!-- name in the dynamic block -->
<swe2:DataRecord id="wmo_41001_sensor1"
definition="http://mmisw.org/ont/ioos/swe_element_type/sensor">
<swe2:field name="sensorID">
<!-- Field: sensorID -->
<!-- The sensorID urn may use a meaningful "component" name (eg, "sbe16"); or, -->
<!-- if not available, a simple, constant string followed by an integer counter -->
<!-- such as "sensor1", "sensor2", "salt1", etc. -->
<!-- IoosTech Convention: -->
<!-- The text element containing the sensor id shall be defined -->
<swe2:Text definition="http://mmisw.org/ont/ioos/definition/sensorID">
<swe2:quality>
<!-- Optional element can contain any valid static quality element for this sensor -->
</swe2:quality>
<swe2:value>urn:ioos:sensor:wmo:41001:sensor1</swe2:value>
</swe2:Text>
</swe2:field>
<!-- Height is generally a static field so we demonstrate its use here. It can be -->
<!-- defined statically or dynamically. -->
<swe2:field name="height">
<!-- The location of the sensor relative to the platform -->
<!-- We don't currently have enough information about orientation and relative position -->
<!-- of sensors on a platform to define a sensor reference frame, but it is certainly -->
<!-- possible to do if and when that is needed. -->
<swe2:Quantity definition="http://mmisw.org/ont/cf/parameter/height"
axisID="Z"
referenceFrame="#wmo_41001_frame">
<swe2:uom code="m" />
<swe2:value>5</swe2:value>
</swe2:Quantity>
</swe2:field>
</swe2:DataRecord>
</swe2:field>
<swe2:field name="wmo_41001_sensor2">
<!-- IoosTech Convention: -->
<!-- The data record containing the static data for a sensor shall be defined -->
<!-- Reminder: the DataRecord id of a sensor in the static block matches the DataChoice item -->
<!-- name in the dynamic block -->
<swe2:DataRecord id="wmo_41001_sensor2"
definition="http://mmisw.org/ont/ioos/swe_element_type/sensor">
<swe2:field name="sensorID">
<!-- IoosTech Convention: -->
<!-- The text element containing the sensor id shall be defined -->
<swe2:Text definition="http://mmisw.org/ont/ioos/definition/sensorID">
<swe2:quality>
<!-- Optional element can contain any valid static quality element for this sensor -->
</swe2:quality>
<swe2:value>urn:ioos:sensor:wmo:41001:sensor2</swe2:value>
</swe2:Text>
</swe2:field>
<swe2:field name="height">
<swe2:Quantity definition="http://mmisw.org/ont/cf/parameter/height"
axisID="Z"
referenceFrame="#wmo_41001_frame">
<swe2:uom code="m" />
<swe2:value>-2</swe2:value>
</swe2:Quantity>
</swe2:field>
</swe2:DataRecord>
</swe2:field>
</swe2:DataRecord>
</swe2:field>
</swe2:DataRecord>
</swe2:field>
<!-- Station 2 static data -->
<swe2:field name="wmo_41002">
<!-- IoosTech Convention: -->
<!-- The data record containing the static data for a station shall be defined -->
<swe2:DataRecord id="wmo_41002"
definition="http://mmisw.org/ont/ioos/swe_element_type/station">
<swe2:field name="stationID">
<!-- IoosTech Convention: -->
<!-- The text element containing the station id shall be defined -->
<swe2:Text definition="http://mmisw.org/ont/ioos/definition/stationID">
<swe2:value>urn:ioos:station:wmo:41002</swe2:value>
</swe2:Text>
</swe2:field>
<swe2:field name="platformLocation">
<swe2:Vector definition="http://www.opengis.net/def/property/OGC/0/PlatformLocation"
referenceFrame="http://www.opengis.net/def/crs-compound?1=http://www.opengis.net/def/crs/EPSG/0/4326&2=http://www.opengis.net/def/crs/EPSG/0/5829"
localFrame="#wmo_41002_frame">
<swe2:coordinate name="latitude">
<swe2:Quantity definition="http://mmisw.org/ont/cf/parameter/latitude" axisID="Lat">
<swe2:uom code="deg" />
<swe2:value>32.5</swe2:value>
</swe2:Quantity>
</swe2:coordinate>
<swe2:coordinate name="longitude">
<swe2:Quantity definition="http://mmisw.org/ont/cf/parameter/longitude" axisID="Lon">
<swe2:uom code="deg" />
<swe2:value>-78.5</swe2:value>
</swe2:Quantity>
</swe2:coordinate>
<swe2:coordinate name="height">
<swe2:Quantity definition="http://mmisw.org/ont/cf/parameter/height" axisID="Z">
<swe2:uom code="m" />
<swe2:value>0</swe2:value>
</swe2:Quantity>
</swe2:coordinate>
</swe2:Vector>
</swe2:field>
<swe2:field name="sensors">
<!-- IoosTech Convention: -->
<!-- The data record containing the static data for each sensor shall be defined -->
<swe2:DataRecord definition="http://mmisw.org/ont/ioos/swe_element_type/sensors">
<swe2:field name="wmo_41002_sensor1">
<!-- IoosTech Convention: -->
<!-- The data record containing the static data for a sensor shall be defined -->
<!-- Reminder: the DataRecord id of a sensor in the static block matches the DataChoice item -->
<!-- name in the dynamic block -->
<swe2:DataRecord id="wmo_41002_sensor1"
definition="http://mmisw.org/ont/ioos/swe_element_type/sensor">
<swe2:field name="sensorID">
<!-- IoosTech Convention: -->
<!-- The text element containing the sensor id shall be defined -->
<swe2:Text definition="http://mmisw.org/ont/ioos/definition/sensorID">
<swe2:value>urn:ioos:sensor:wmo:41002:sensor1</swe2:value>
</swe2:Text>
</swe2:field>
<swe2:field name="height">
<swe2:Quantity definition="http://mmisw.org/ont/cf/parameter/height"
axisID="Z"
referenceFrame="#wmo_41002_frame">
<swe2:uom code="m" />
<swe2:value>3</swe2:value>
</swe2:Quantity>
</swe2:field>
</swe2:DataRecord>
</swe2:field>
<swe2:field name="wmo_41002_sensor2">
<!-- IoosTech Convention: -->
<!-- The data record containing the static data for a sensor shall be defined -->
<swe2:DataRecord id="wmo_41002_sensor2"
definition="http://mmisw.org/ont/ioos/swe_element_type/sensor">
<swe2:field name="sensorID">
<!-- IoosTech Convention: -->
<!-- The text element containing the sensor id shall be defined -->
<swe2:Text definition="http://mmisw.org/ont/ioos/definition/sensorID">
<swe2:value>urn:ioos:sensor:wmo:41002:sensor2</swe2:value>
</swe2:Text>
</swe2:field>
<swe2:field name="height">
<swe2:Quantity definition="http://mmisw.org/ont/cf/parameter/height"
axisID="Z"
referenceFrame="#wmo_41002_frame">
<swe2:uom code="m" />
<swe2:value>-5</swe2:value>
</swe2:Quantity>
</swe2:field>
</swe2:DataRecord>
</swe2:field>
</swe2:DataRecord>
</swe2:field>
</swe2:DataRecord>
</swe2:field>
<!-- Station 3 static data -->
<swe2:field name="wmo_41003">
<!-- IoosTech Convention: -->
<!-- The data record containing the static data for a station shall be defined -->
<swe2:DataRecord id="wmo_41003"
definition="http://mmisw.org/ont/ioos/swe_element_type/station">
<swe2:field name="stationID">
<!-- IoosTech Convention: -->
<!-- The text element containing the station id shall be defined -->
<swe2:Text definition="http://mmisw.org/ont/ioos/definition/stationID">
<swe2:value>urn:ioos:station:wmo:41003</swe2:value>
</swe2:Text>
</swe2:field>
<swe2:field name="platformLocation">
<swe2:Vector definition="http://www.opengis.net/def/property/OGC/0/PlatformLocation"
referenceFrame="http://www.opengis.net/def/crs-compound?1=http://www.opengis.net/def/crs/EPSG/0/4326&2=http://www.opengis.net/def/crs/EPSG/0/5829"
localFrame="#wmo_41003_frame">
<swe2:coordinate name="latitude">
<swe2:Quantity definition="http://mmisw.org/ont/cf/parameter/latitude" axisID="Lat">
<swe2:uom code="deg" />
<swe2:value>33.5</swe2:value>
</swe2:Quantity>
</swe2:coordinate>
<swe2:coordinate name="longitude">
<swe2:Quantity definition="http://mmisw.org/ont/cf/parameter/longitude" axisID="Lon">
<swe2:uom code="deg" />
<swe2:value>-79.5</swe2:value>
</swe2:Quantity>
</swe2:coordinate>
<swe2:coordinate name="height">
<swe2:Quantity definition="http://mmisw.org/ont/cf/parameter/height" axisID="Z">
<swe2:uom code="m" />
<swe2:value>0</swe2:value>
</swe2:Quantity>
</swe2:coordinate>
</swe2:Vector>
</swe2:field>
<swe2:field name="sensors">
<!-- IoosTech Convention: -->
<!-- The data record containing the static data for each sensor shall be defined -->
<swe2:DataRecord definition="http://mmisw.org/ont/ioos/swe_element_type/sensors">
<swe2:field name="wmo_41003_sensor1">
<!-- IoosTech Convention: -->
<!-- The data record containing the static data for a sensor shall be defined -->
<!-- Reminder: the DataRecord id of a sensor in the static block matches the DataChoice item -->
<!-- name in the dynamic block -->
<swe2:DataRecord id="wmo_41003_sensor1"
definition="http://mmisw.org/ont/ioos/swe_element_type/sensor">
<swe2:field name="sensorID">
<!-- IoosTech Convention: -->
<!-- The text element containing the sensor id shall be defined -->
<swe2:Text definition="http://mmisw.org/ont/ioos/definition/sensorID">
<swe2:value>urn:ioos:sensor:wmo:41003:sensor1</swe2:value>
</swe2:Text>
</swe2:field>
<swe2:field name="height">
<swe2:Quantity definition="http://mmisw.org/ont/cf/parameter/height"
axisID="Z"
referenceFrame="#wmo_41003_frame">
<swe2:uom code="m" />
<swe2:value>3</swe2:value>
</swe2:Quantity>
</swe2:field>
</swe2:DataRecord>
</swe2:field>
</swe2:DataRecord>
</swe2:field>
</swe2:DataRecord>
</swe2:field>
</swe2:DataRecord>
</swe2:field>
<!-- DYNAMIC DATA (SENSOR OBSERVATIONS) -->
<!-- All measurements made by sensors and any other dynamic data (e.g. location for mobile sensors) -->
<!-- are encoded in a DataArray. Again, sensor field name in the static DataRecord above corresponds to -->
<!-- DataChoice item name in the dynamic DataArray -->
<swe2:field name="observationData">
<!-- IoosTech Convention: -->
<!-- The field containing the dynamic data from each sensor shall contain a DataArray defined as such-->
<swe2:DataArray definition="http://mmisw.org/ont/ioos/swe_element_type/sensorObservationCollection">
<!-- Count of records in swe:values -->
<swe2:elementCount>
<swe2:Count>
<swe2:value>13</swe2:value>
</swe2:Count>
</swe2:elementCount>
<!-- Definition of fields in the DataArray -->
<swe2:elementType name="observations">
<!-- IoosTech Convention: -->
<!-- The data record containing the dynamic observation descriptors for each sensor shall be defined -->
<swe2:DataRecord definition="http://mmisw.org/ont/ioos/swe_element_type/sensorObservations">
<!-- Time is included for all sensor so it is listed first and is outside of DataChoice. -->
<!-- If time is defined differently for some sensors it could be moved inside the data -->
<!-- but this is uncommon. -->
<swe2:field name="time">
<swe2:Time definition="http://www.opengis.net/def/property/OGC/0/SamplingTime">
<!-- IoosTech Convention: -->
<!-- This is an optional quality element used to express QC data that applies to an -->
<!-- entire record. The definition of the Category element spcifies that it applies -->
<!-- to the entire record, not to the time element. -->
<swe2:quality>
<swe2:Category definition="http://mmisw.org/ont/ioos/swe_element_type/recordQuality">
<swe2:constraint>
<swe2:AllowedTokens>
<swe2:value>a</swe2:value>
<swe2:value>b</swe2:value>
<swe2:value>c</swe2:value>
</swe2:AllowedTokens>
</swe2:constraint>
</swe2:Category>
</swe2:quality>
<swe2:uom xlink:href="http://www.opengis.net/def/uom/ISO-8601/0/Gregorian" />
</swe2:Time>
</swe2:field>
<!-- Since different observations are made by each sensor, DataChoice is used to select -->
<!-- a sensor and the set of observation fields for each record from that sensor in the -->
<!-- block encoded values of the data array. -->
<swe2:field name="sensor">
<!-- IoosTech Convention: -->
<!-- The data array shall contain one field with a DataChoice defined as sensor records -->
<swe2:DataChoice definition="http://mmisw.org/ont/ioos/swe_element_type/sensors">
<!-- DataChoice for wmo 41001's sensor1 -->
<!-- Dynamic sensor observations are linked to static data using the DataChoice -->
<!-- item name: wmo_41001_sensor1 -->
<swe2:item name="wmo_41001_sensor1">
<!-- IoosTech Convention: -->
<!-- The data record containing the dynamic observation descriptors for a sensor shall be defined -->
<swe2:DataRecord definition="http://mmisw.org/ont/ioos/swe_element_type/sensor">
<!-- wmo_41001_sensor1's observed properties -->
<swe2:field name="air_temperature">
<swe2:Quantity definition="http://mmisw.org/ont/cf/parameter/air_temperature">
<!-- The next 3 elements specify the quality of the Air Temperature field -->
<!-- using ndbc qc flags as an example. -->
<swe2:quality>
<!-- NDBC EQC Quality -->
<!-- Data Descriptor only - value must be block encoded -->
<swe2:Category
definition="http://sdftest.ndbc.noaa.gov/sos/qcflags.shtml">
<swe2:label>EQC Flag</swe2:label>
<swe2:codeSpace
xlink:href="http://sdftest.ndbc.noaa.gov/sos/qcflags.shtml"/>
<!-- This is not a formal code space. Use it till something better is created.-->
<swe2:constraint>
<swe2:AllowedTokens id="ndbcEqcFlags">
<swe2:value>T</swe2:value>
<swe2:value>M</swe2:value>
<swe2:value>W</swe2:value>
<swe2:value>D</swe2:value>
<swe2:value>S</swe2:value>
<swe2:value>V</swe2:value>
<swe2:value>L</swe2:value>
<swe2:value>H</swe2:value>
<swe2:value>R</swe2:value>
</swe2:AllowedTokens>
</swe2:constraint>
</swe2:Category>
</swe2:quality>
<swe2:quality>
<!-- NDBC DQA Quality -->
<!-- Unfortuantly there is no way to specify an array quality elements inside the -->
<!-- quantity. To allow for upto 2 values, two quality fields must be defined. -->
<swe2:Category
definition="http://sdftest.ndbc.noaa.gov/sos/qcflags.shtml">
<swe2:label>DQA Flag 1</swe2:label>
<swe2:codeSpace
xlink:href="http://sdftest.ndbc.noaa.gov/sos/qcflags.shtml"/>
<!-- This is not a formal code space. Use it till something better is created.-->
<swe2:constraint>
<swe2:AllowedTokens id="ndbcDqaFlags">
<swe2:value>a</swe2:value>
<swe2:value>b</swe2:value>
<swe2:value>d</swe2:value>
<swe2:value>f</swe2:value>
<swe2:value>g</swe2:value>
<swe2:value>i</swe2:value>
<swe2:value>j</swe2:value>
<swe2:value>k</swe2:value>
<swe2:value>m</swe2:value>
<swe2:value>n</swe2:value>
<swe2:value>p</swe2:value>
<swe2:value>q</swe2:value>
<swe2:value>r</swe2:value>
<swe2:value>s</swe2:value>
<swe2:value>t</swe2:value>
<swe2:value>v</swe2:value>
<swe2:value>w</swe2:value>
<swe2:value>x</swe2:value>
<swe2:value>y</swe2:value>
<swe2:value>z</swe2:value>
</swe2:AllowedTokens>
</swe2:constraint>
</swe2:Category>
</swe2:quality>
<swe2:quality>
<!-- Second DQA element -->
<swe2:Category
definition="http://sdftest.ndbc.noaa.gov/sos/qcflags.shtml">
<swe2:label>DQA Flag 2</swe2:label>
<swe2:codeSpace
xlink:href="http://sdftest.ndbc.noaa.gov/sos/qcflags.shtml"/>
<!-- This is not a formal code space. Use it till something better is created.-->
<swe2:constraint xlink:href="#ndbcDqaFlags"/>
<!-- The second DQA element can reference the constraints defined in the first -->
</swe2:Category>
</swe2:quality>
<!-- End quality elements -->
<swe2:uom code="Celsius" />
</swe2:Quantity>
</swe2:field>
<swe2:field name="wind_speed">
<swe2:Quantity definition="http://mmisw.org/ont/cf/parameter/wind_speed">
<!-- Each field and quantity can reference the constraints defined above to -->
<!-- define quality elements. -->
<swe2:quality>
<swe2:Category>
<swe2:label> DQA Flag 1</swe2:label>
<!-- Example of constraint by reference -->
<swe2:constraint xlink:href="#ndbcDqaFlags"/>
</swe2:Category>
</swe2:quality>
<swe2:nilValues>
<swe2:NilValues>
<swe2:nilValue reason="http://www.opengis.net/def/nil/OGC/0/BelowDetectionRange"> INF </swe2:nilValue>
<!-- nilValue for a quntity may be one of INF, -INF, NaN or any value (such as 5.28) -->
<!-- See SWE Common Data Moel OGC 08-094r1 section 8.1.14 NilValues Element for details -->
<!-- Use a defined reason where possible -->
</swe2:NilValues>
</swe2:nilValues>
<swe2:uom code="m/s" />
</swe2:Quantity>
</swe2:field>
<swe2:field name="wind_to_direction">
<swe2:Quantity definition="http://mmisw.org/ont/cf/parameter/wind_to_direction">
<swe2:uom code="degrees" />
</swe2:Quantity>
</swe2:field>
</swe2:DataRecord>
</swe2:item>
<swe2:item name="wmo_41001_sensor2">
<swe2:DataRecord definition="http://mmisw.org/ont/ioos/swe_element_type/sensor">
<swe2:field name="sea_water_temperature">
<swe2:Quantity definition="http://mmisw.org/ont/cf/parameter/sea_water_temperature">
<swe2:uom code="Celsius" />
</swe2:Quantity>
</swe2:field>
<swe2:field name="dissolved_oxygen">
<swe2:Quantity definition="http://mmisw.org/ont/ioos/parameter/dissolved_oxygen">
<swe2:uom code="mg/L" />
</swe2:Quantity>
</swe2:field>
</swe2:DataRecord>
</swe2:item>
<swe2:item name="wmo_41002_sensor1">
<swe2:DataRecord definition="http://mmisw.org/ont/ioos/swe_element_type/sensor">
<swe2:field name="air_temperature">
<swe2:Quantity definition="http://mmisw.org/ont/cf/parameter/air_temperature">
<swe2:uom code="Celsius" />
</swe2:Quantity>
</swe2:field>
</swe2:DataRecord>
</swe2:item>
<swe2:item name="wmo_41002_sensor2">
<swe2:DataRecord definition="http://mmisw.org/ont/ioos/swe_element_type/sensor">
<swe2:field name="sea_water_temperature">
<swe2:Quantity definition="http://mmisw.org/ont/cf/parameter/sea_water_temperature">
<swe2:uom code="Celsius" />
</swe2:Quantity>
</swe2:field>
</swe2:DataRecord>
</swe2:item>
<swe2:item name="wmo_41003_sensor1">
<swe2:DataRecord definition="http://mmisw.org/ont/ioos/swe_element_type/sensor">
<swe2:field name="air_temperature">
<swe2:Quantity definition="http://mmisw.org/ont/cf/parameter/air_temperature">
<swe2:uom code="Celsius" />
</swe2:Quantity>
</swe2:field>
</swe2:DataRecord>
</swe2:item>
</swe2:DataChoice>
</swe2:field>
</swe2:DataRecord>
</swe2:elementType>
<swe2:encoding>
<!-- SWE encoding and data values -->
<!-- IoosTech Convention: -->
<!-- swe:encoding *must* be always specified exactly as described below, -->
<!-- to avoid the need to have fully general parsers that interpret -->
<!-- swe:TextEncoding. That is, parsers may hard-code this particular -->
<!-- swe:TextEncoding specification. -->
<!-- -->
<!-- About DataChoice from SWE Common 2.0: -->
<!-- 9.2.5 Rules for DataChoice -->
<!-- A тАЬDataChoiceтАЭ is encoded with the text method by providing the name of the selected item -->
<!-- before the item values themselves. The name used shall correspond to the тАЬnameтАЭ attribute -->
<!-- of the тАЬitemтАЭ property element that describes the structure of the selected item. -->
<!-- -->
<!-- IoosTech Convention: -->
<!-- The name encoded for by data choice must match both the static sensor field name -->
<!-- as well as the name attribute of the data choice item in the dynamic data. -->
<!-- -->
<!-- This data stream interleaves different types of messages separated by the block separator -->
<!-- character. The element type is a тАЬDataChoiceтАЭ which means that each block is composed of -->
<!-- the item name, followed by values of the item. This example also demonstrates that items -->
<!-- of a choice can be of different types and length. -->
<swe2:TextEncoding
decimalSeparator="."
tokenSeparator=","
blockSeparator=" " />
</swe2:encoding>
<swe2:values>
<!-- The first three records are from wmo_41001_sensor1 and contain quality values -->
2009-05-23T00:00:00Z,a,wmo_41001_sensor1,15.4,T,a,r,2.0,m,280
2009-05-23T01:00:00Z,b,wmo_41001_sensor1,15.8,M,j,j,1.8,m,121
2009-05-23T02:00:00Z,c,wmo_41001_sensor1,15.6,M,,,1.0,m,142
2009-05-23T00:00:00Z,a,wmo_41001_sensor2,5.6,8.0
2009-05-23T01:00:00Z,b,wmo_41001_sensor2,5.8,8.2
2009-05-23T02:00:00Z,c,wmo_41001_sensor2,5.7,8.5
2009-05-23T00:00:00Z,a,wmo_41002_sensor1,16.2
2009-05-23T01:00:00Z,b,wmo_41002_sensor1,16.4
2009-05-23T02:00:00Z,c,wmo_41002_sensor1,16.5
2009-05-23T00:00:00Z,a,wmo_41002_sensor2,6.1
2009-05-23T01:00:00Z,b,wmo_41002_sensor2,6.3
2009-05-23T02:00:00Z,c,wmo_41002_sensor2,6.5
2009-05-23T01:00:00Z,a,wmo_41003_sensor1,15.8
</swe2:values>
</swe2:DataArray>
</swe2:field>
</swe2:DataRecord>