<?xml version="1.0" encoding="UTF-8"?>
<!--
'$RCSfile: eml-unitDictionary.xml,v $'
       Copyright: 1997-2002 Regents of the University of California,
                            University of New Mexico, and
                            Arizona State University
        Sponsors: National Center for Ecological Analysis and Synthesis and
                  Partnership for Interdisciplinary Studies of Coastal Oceans,
                     University of California Santa Barbara
                  Long-Term Ecological Research Network Office,
                     University of New Mexico
                  Center for Environmental Studies, Arizona State University
   Other funding: National Science Foundation (see README for details)
                  The David and Lucile Packard Foundation
     For Details: http://knb.ecoinformatics.org/

        '$Author: obrien $'
          '$Date: 2008-11-06 23:06:31 $'
      '$Revision: 1.43 $'

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
-->
<stmml:unitList xmlns:stmml="http://www.xml-cml.org/schema/stmml-1.2"
  xmlns:sch="http://www.ascc.net/xml/schematron"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns="http://www.xml-cml.org/schema/stmml-1.2"
  xsi:schemaLocation="http://www.xml-cml.org/schema/stmml-1.2 xsd/stmml.xsd">
  <!-- ======================================================================= -->
  <!-- ========================= fundamental types =========================== -->
  <!-- ======================================================================= -->
  <unitType id="length" name="length">
    <!--meter-->
    <dimension name="length"/>
  </unitType>

  <unitType id="time" name="time">
    <!--second-->
    <dimension name="time"/>
  </unitType>

  <unitType id="mass" name="mass">
    <!--kilogram-->
    <dimension name="mass"/>
  </unitType>

  <unitType id="current" name="current">
    <!--ampere-->
    <dimension name="current"/>
  </unitType>

  <unitType id="temperature" name="temperature">
    <!--kelvin-->
    <dimension name="temperature"/>
  </unitType>

  <unitType id="amount" name="amount">
    <!--mole-->
    <dimension name="amount"/>
  </unitType>

  <unitType id="luminosity" name="luminosity">
    <!--candela-->
    <dimension name="luminosity"/>
  </unitType>

  <unitType id="dimensionless" name="dimensionless">
    <dimension name="dimensionless"/>
  </unitType>

  <unitType id="angle" name="angle">
    <!--radian-->
    <dimension name="angle"/>
  </unitType>

  <!-- ======================================================================= -->
  <!-- ========================== derived types ============================== -->
  <!-- ======================================================================= -->

  <unitType id="acceleration" name="acceleration">
    <!--metersPerSecondSquared-->
    <dimension name="length"/>
    <dimension name="time" power="-2"/>
  </unitType>

  <unitType id="charge" name="charge">
    <!--coulomb-->
    <dimension name="current"/>
    <dimension name="time" power="1"/>
  </unitType>

  <unitType id="magneticFieldStrength" name="magneticFieldStrength">
    <!--amperePerMeter-->
    <dimension name="current"/>
    <dimension name="length" power="-1"/>
  </unitType>

  <unitType id="currentDensity" name="currentDensity">
    <!--amperePerSquareMeter-->
    <dimension name="current"/>
    <dimension name="length" power="-2"/>
  </unitType>

  <unitType id="area" name="area">
    <!--squareMeters-->
    <dimension name="length" power="2"/>
  </unitType>

  <unitType id="lengthReciprocal" name="lengthReciprocal">
    <!--waveNumber-->
    <dimension name="length" power="-1"/>
  </unitType>

  <unitType id="frequency" name="frequency">
    <!--hertz-->
    <dimension name="time" power="-1"/>
  </unitType>

  <unitType id="volume" name="volume">
    <!--cubicMeter-->
    <dimension name="length" power="3"/>
  </unitType>

  <unitType id="volumetricArea" name="volumetricArea">
    <!--litersPerSquareMeter-->
    <dimension name="length" power="3"/>
    <dimension name="length" power="-2"/>
  </unitType>

  <unitType id="speed" name="speed">
    <!--metersPerSecond-->
    <dimension name="length"/>
    <dimension name="time" power="-1"/>
  </unitType>

  <unitType id="massDensity" name="massDensity">
    <!--kilogramPerCubicMeter-->
    <dimension name="mass"/>
    <dimension name="length" power="-3"/>
  </unitType>

  <unitType id="massPerMass" name="massPerMass">
    <!--gramsPerGram-->
    <dimension name="mass"/>
    <dimension name="mass" power="-1"/>
  </unitType>
  
  <unitType id="massPerMassRate" name="massPerMassRate">
    <!--gramsPerGramPerTime-->
    <dimension name="mass"/>
    <dimension name="mass" power="-1"/>
    <dimension name="time" power="-1"/>  
  </unitType>


  <unitType id="volumePerVolume" name="volumePerVolume">
    <!--cubicCentimetersPerCubicCentimeter-->
    <dimension name="length" power="3"/>
    <dimension name="mass" power="-3"/>
  </unitType>

  <unitType id="volumetricRate" name="volumetricRate">
    <!--litersPerSecond-->
    <dimension name="length" power="3"/>
    <dimension name="time" power="-1"/>
  </unitType>

  <unitType id="volumetricMassDensityRate" name="volumetricMassDensityRate">
    <!--gramsPerLiterPerDay-->
    <dimension name="mass"/>
    <dimension name="length" power="-3"/>
    <dimension name="time" power="-1"/>
  </unitType>

  <unitType id="massFlux" name="massFlux">
    <!--kilogramsPerMeterSquaredPerSecond-->
    <dimension name="mass"/>
    <dimension name="length" power="-2"/>
    <dimension name="time" power="-1"/>
  </unitType>

  <unitType id="specificVolume" name="specificVolume">
    <!--cubicMeterPerKilogram-->
    <dimension name="mass" power="-1"/>
    <dimension name="length" power="3"/>
  </unitType>

  <unitType id="amountOfSubstanceConcentration" name="amountOfSubstanceConcentration">
    <!--molePerCubicMeter-->
    <dimension name="amount"/>
    <dimension name="length" power="-3"/>
  </unitType>

  <unitType id="amountOfSubstanceWeight" name="amountOfSubstanceWeight">
    <!--molesPerKilogram-->
    <dimension name="amount"/>
    <dimension name="mass" power="-1"/>
  </unitType>

  <unitType id="amountOfSubstanceWeightRate" name="amountOfSubstanceWeightRate">
    <!--molesPerKilogramPerSecond-->
    <dimension name="amount"/>
    <dimension name="mass" power="-1"/>
    <dimension name="time" power="-1"/>
  </unitType>

  <unitType id="massRate" name="massRate">
    <!--kilogramsPerSecond-->
    <dimension name="mass"/>
    <dimension name="time" power="-1"/>
  </unitType>

  <unitType id="luminance" name="luminance">
    <!--candelaPerSquareMeter-->
    <dimension name="luminosity"/>
    <dimension name="length" power="-2"/>
  </unitType>

  <unitType id="volumetricDensity" name="volumetricDensity">
    <!--numberPerMeterCubed-->
    <dimension name="dimensionless"/>
    <dimension name="length" power="-3"/>
  </unitType>

  <unitType id="arealDensity" name="arealDensity">
    <!--numberPerMeterSquared-->
    <dimension name="dimensionless"/>
    <dimension name="length" power="-2"/>
  </unitType>

  <unitType id="arealMassDensity" name="arealMassDensity">
    <!--kilogramPerSquareMeter-->
    <dimension name="mass"/>
    <dimension name="length" power="-2"/>
  </unitType>

  <unitType id="specificArea" name="specificArea">
    <!--squareMeterPerKilogram-->
    <dimension name="mass" power="-1"/>
    <dimension name="length" power="2"/>
  </unitType>

  <unitType id="force" name="force">
    <!--newton-->
    <dimension name="mass"/>
    <dimension name="length"/>
    <dimension name="time" power="-2"/>
  </unitType>

  <unitType id="energy" name="energy">
    <!--joule-->
    <dimension name="mass"/>
    <dimension name="length" power="2"/>
    <dimension name="time" power="-2"/>
  </unitType>

  <unitType id="power" name="power">
    <!--watt-->
    <dimension name="mass"/>
    <dimension name="length" power="2"/>
    <dimension name="time" power="-3"/>
  </unitType>

  <unitType id="potentialDifference" name="potentialDifference">
    <!--volt-->
    <dimension name="mass"/>
    <dimension name="length" power="2"/>
    <dimension name="time" power="-3"/>
    <dimension name="current" power="-1"/>
  </unitType>

  <unitType id="capacitance" name="capacitance">
    <!--farad-->
    <dimension name="mass" power="-1"/>
    <dimension name="length" power="-2"/>
    <dimension name="time" power="4"/>
    <dimension name="current" power="2"/>
  </unitType>

  <unitType id="resistance" name="resistance">
    <!--ohm-->
    <dimension name="mass"/>
    <dimension name="length" power="2"/>
    <dimension name="time" power="-3"/>
    <dimension name="current" power="-2"/>
  </unitType>

  <unitType id="resistivity" name="resistivity">
    <!--ohmMeters-->
    <dimension name="mass"/>
    <dimension name="length" power="3"/>
    <dimension name="time" power="-3"/>
    <dimension name="current" power="-2"/>
  </unitType>

  <unitType id="conductance" name="conductance">
    <!--siemens-->
    <dimension name="mass" power="-1"/>
    <dimension name="length" power="-2"/>
    <dimension name="time" power="3"/>
    <dimension name="current" power="2"/>
  </unitType>

  <unitType id="magneticFlux" name="magneticFlux">
    <!--weber-->
    <dimension name="mass"/>
    <dimension name="length" power="2"/>
    <dimension name="time" power="-2"/>
    <dimension name="current" power="-1"/>
  </unitType>

  <unitType id="magneticFluxDensity" name="magneticFluxDensity">
    <!--tesla-->
    <dimension name="mass"/>
    <dimension name="time" power="-2"/>
    <dimension name="current" power="-1"/>
  </unitType>

  <unitType id="inductance" name="inductance">
    <!--henry-->
    <dimension name="mass"/>
    <dimension name="length" power="2"/>
    <dimension name="time" power="-2"/>
    <dimension name="current" power="-2"/>
  </unitType>

  <unitType id="illuminance" name="illuminance">
    <!--lux-->
    <dimension name="luminosity"/>
    <dimension name="length" power="-2"/>
  </unitType>

  <unitType id="radionucleotideActivity" name="radionucleotideActivity">
    <!--becquerel-->
    <dimension name="time" power="-1"/>
  </unitType>

  <unitType id="specificEnergy" name="specificEnergy">
    <!--gray-->
    <dimension name="time" power="-2"/>
    <dimension name="length" power="2"/>
  </unitType>

  <unitType id="doseEquivalent" name="doseEquivalent">
    <!--sievert-->
    <dimension name="time" power="-2"/>
    <dimension name="length" power="2"/>
  </unitType>

  <unitType id="catalyticActivity" name="catalyticActivity">
    <!--katal-->
    <dimension name="time" power="-1"/>
    <dimension name="amount"/>
  </unitType>

  <unitType id="pressure" name="pressure">
    <!--pascal-->
    <dimension name="mass"/>
    <dimension name="time" power="-2"/>
    <dimension name="length" power="1"/>
  </unitType>

  <unitType id="transmissivity" name="transmissivity">
    <!--metersSquaredPerSecond-->
    <dimension name="length" power="2"/>
    <dimension name="time" power="-1"/>
  </unitType>

  <unitType id="massSpecificLength" name="massSpecificLength">
    <!--metersPerGram-->
    <dimension name="length"/>
    <dimension name="mass" power="-1"/>
  </unitType>

  <unitType id="massSpecificCount" name="massSpecificCount">
    <!--numberPerGram-->
    <dimension name="dimensionless"/>
    <dimension name="mass" power="-1"/>
  </unitType>
  <!-- ======================================================================= -->
  <!-- ====================== Unit Definitions =============================== -->
  <!-- ======================================================================= -->

  <unit id="dimensionless" name="dimensionless" unitType="dimensionless" udunitsSynonym="">
    <description>a designation asserting the absence of an associated unit</description>
  </unit>

  <unit id="second" name="second" unitType="time" abbreviation="sec" multiplierToSI="1"
    udunitsSynonym="second">
    <description>SI unit of time</description>
  </unit>

  <unit id="meter" name="meter" unitType="length" abbreviation="m" multiplierToSI="1"
    udunitsSynonym="meter">
    <description>SI unit of length</description>
  </unit>

  <unit id="kilogram" name="kilogram" unitType="mass" abbreviation="kg" multiplierToSI="1"
    udunitsSynonym="kilogram">
    <description>SI unit of mass</description>
  </unit>

  <unit id="kelvin" name="kelvin" unitType="temperature" abbreviation="K" multiplierToSI="1"
    udunitsSynonym="kelvin">
    <description>SI unit of temperature</description>
  </unit>

  <unit id="coulomb" name="coulomb" unitType="charge" abbreviation="C" multiplierToSI="1"
    udunitsSynonym="coulomb">
    <description>SI unit of charge</description>
  </unit>

  <unit id="ampere" name="ampere" unitType="current" abbreviation="A" multiplierToSI="1"
    udunitsSynonym="ampere">
    <description>SI unit of electrical current</description>
  </unit>

  <unit id="mole" name="mole" unitType="amount" abbreviation="mol" multiplierToSI="1"
    udunitsSynonym="mole">
    <description>SI unit of substance amount</description>
  </unit>

  <unit id="candela" name="candela" unitType="luminosity" abbreviation="cd" multiplierToSI="1"
    udunitsSynonym="candela">
    <description>SI base unit of luminous intensity (luminous power per unti solid angle emitted
    by a point light source in a particular direction)</description>
  </unit>

  <unit id="number" name="number" unitType="dimensionless" udunitsSynonym="count">
    <description>a quantity or amount</description>
  </unit>

  <unit id="cubicMeter" name="cubicMeter" unitType="volume" multiplierToSI="1" abbreviation="m³"
    deprecatedInFavorOf="meterCubed" udunitsSynonym="meter^3">
    <description>cubic meter</description>
  </unit>

  <!--nominal time-->
  <!--all of these date/time fields are calculated to the nearest second, excluding
  leap seconds and leap days except for nominalLeapYear.-->
  <unit id="nominalMinute" name="nominalMinute" unitType="time" parentSI="second"
    multiplierToSI="60" udunitsSynonym="minute">
    <description>one minute of time excluding leap seconds, 60 seconds</description>
  </unit>
  <unit id="nominalHour" name="nominalHour" unitType="time" parentSI="second" multiplierToSI="3600"
    udunitsSynonym="hour">
    <description>one hour excluding leap seconds, 3600 seconds</description>
  </unit>
  <unit id="nominalDay" name="nominalDay" unitType="time" parentSI="second" multiplierToSI="86400"
    udunitsSynonym="day">
    <description>one day excluding leap seconds, 86400 seconds</description>
  </unit>
  <unit id="nominalWeek" name="nominalWeek" unitType="time" parentSI="second"
    multiplierToSI="604800" udunitsSynonym="week">
    <description>one day excluding leap seconds, 604800 seconds</description>
  </unit>
  <unit id="nominalYear" name="nominalYear" unitType="time" parentSI="second"
    multiplierToSI="31536000" udunitsSynonym="common_year">
    <description>one year excluding leap seconds and leap days, 31536000 seconds</description>
  </unit>
  <unit id="nominalLeapYear" name="nominalLeapYear" unitType="time" parentSI="second"
    multiplierToSI="31622400" udunitsSynonym="leap_year">
    <description>one 366 day year excluding leap seconds, 31622400 seconds</description>
  </unit>

  <!--mass-->
  <unit id="nanogram" name="nanogram" unitType="mass" parentSI="kilogram"
    multiplierToSI="0.000000000001" abbreviation="ng" udunitsSynonym="nanogram">
    <description>0.000000000001 kg</description>
  </unit>
  <unit id="microgram" name="microgram" unitType="mass" parentSI="kilogram"
    multiplierToSI="0.000000001" abbreviation="μg" udunitsSynonym="microgram">
    <description>0.000000001 kg</description>
  </unit>
  <unit id="milligram" name="milligram" unitType="mass" parentSI="kilogram"
    multiplierToSI="0.000001" abbreviation="mg" udunitsSynonym="milligram">
    <description>0.000001 kg</description>
  </unit>
  <unit id="centigram" name="centigram" unitType="mass" parentSI="kilogram" multiplierToSI="0.00001"
    abbreviation="cg" udunitsSynonym="centigram">
    <description>0.00001 kg</description>
  </unit>
  <unit id="decigram" name="decigram" unitType="mass" parentSI="kilogram" multiplierToSI="0.0001"
    abbreviation="dg" udunitsSynonym="decigram">
    <description>0.0001 kg</description>
  </unit>
  <unit id="gram" name="gram" unitType="mass" parentSI="kilogram" multiplierToSI="0.001"
    abbreviation="g" udunitsSynonym="gram">
    <description>0.001 kg</description>
  </unit>
  <unit id="dekagram" name="dekagram" unitType="mass" parentSI="kilogram" multiplierToSI="0.01"
    abbreviation="dag" udunitsSynonym="dekagram">
    <description>.01 kg</description>
  </unit>
  <unit id="hectogram" name="hectogram" unitType="mass" parentSI="kilogram" multiplierToSI="0.1"
    abbreviation="hg" udunitsSynonym="hectogram">
    <description>.1 kg</description>
  </unit>
  <unit id="megagram" name="megagram" unitType="mass" parentSI="kilogram" multiplierToSI="1000"
    abbreviation="Mg" udunitsSynonym="megagram">
    <description>1000 kg</description>
  </unit>

  <unit id="tonne" name="tonne" unitType="mass" parentSI="kilogram" multiplierToSI="1000"
    abbreviation="T" udunitsSynonym="metric_ton">
    <description>unit of mass equal to 1,000 kilograms, equivalent to approximately 2,204.6 
      pounds,1.102 short tons (US) or 0.984 long tons (imperial). 
      Not part of the SI, but accepted for use with SI units and prefixes</description>
  </unit>

  <unit id="pound" name="pound" parentSI="kilogram" abbreviation="lbs" multiplierToSI="0.4536"
    udunitsSynonym="avoirdupois_pound">
    <description>1 pound (symbol lb) in the Avoirdupois (commerce) scale, and defined 
      as exactly 0.45359237 kg. Also equal to 16 avoirdupois ounces and to 7,000 grains.</description>
  </unit>
  <unit id="ton" name="ton" parentSI="kilogram" abbreviation="ton" multiplierToSI="907.1999"
    udunitsSynonym="short_ton">
    <description>standard US (short) ton = 2000 lbs</description>
  </unit>

  <!--temp-->
  <unit id="celsius" name="celsius" parentSI="kelvin" multiplierToSI="1" constantToSI="273.18"
    abbreviation="C" udunitsSynonym="celsius">
    <description>A common unit of temperature</description>
  </unit>

  <unit id="fahrenheit" name="fahrenheit" parentSI="kelvin" abbreviation="F" multiplierToSI="0.556"
    constantToSI="255.402" udunitsSynonym="fahrenheit">
    <description>unit for temperature on the scale in which water freezes at 32 and boils 
      at 212 under standard conditions.</description>
  </unit>

  <!--length-->
  <unit id="nanometer" name="nanometer" parentSI="meter" multiplierToSI="0.000000001"
    abbreviation="nm" udunitsSynonym="nanometer">
    <description>.000000001 meters</description>
  </unit>
  <unit id="micrometer" name="micrometer" parentSI="meter" multiplierToSI="0.000001"
    abbreviation="μm" udunitsSynonym="micrometer">
    <description>.000001 meters</description>
  </unit>
  <unit id="micron" name="micron" parentSI="meter" multiplierToSI="0.000001" abbreviation="μ"
    deprecatedInFavorOf="micrometer" udunitsSynonym="micrometer">
    <description>.000001 meters</description>
  </unit>
  <unit id="millimeter" name="millimeter" parentSI="meter" multiplierToSI="0.001" abbreviation="mm"
    udunitsSynonym="millimeter">
    <description>.001 meters</description>
  </unit>
  <unit id="centimeter" name="centimeter" parentSI="meter" multiplierToSI="0.01" abbreviation="cm"
    udunitsSynonym="centimeter">
    <description>.01 meters</description>
  </unit>
  <unit id="decimeter" name="decimeter" parentSI="meter" multiplierToSI="0.1" abbreviation="dm"
    udunitsSynonym="decimeter">
    <description>.1 meters</description>
  </unit>
  <unit id="dekameter" name="dekameter" parentSI="meter" multiplierToSI="10" abbreviation="dam"
    udunitsSynonym="dekameter">
    <description>10 meters</description>
  </unit>
  <unit id="hectometer" name="hectometer" parentSI="meter" multiplierToSI="100" abbreviation="hm"
    udunitsSynonym="hectometer">
    <description>100 meters</description>
  </unit>
  <unit id="kilometer" name="kilometer" parentSI="meter" multiplierToSI="1000" abbreviation="km"
    udunitsSynonym="kilometer">
    <description>1000 meters</description>
  </unit>
  <unit id="megameter" name="megameter" parentSI="meter" multiplierToSI="1000000" abbreviation="Mm"
    udunitsSynonym="megameter">
    <description>1000000 meters</description>
  </unit>
  <unit id="angstrom" name="angstrom" parentSI="meter" multiplierToSI="0.0000000001"
    abbreviation="Å" udunitsSynonym="angstrom">
    <description>1/10000000000 meter</description>
  </unit>

  <unit id="inch" name="inch" parentSI="meter" abbreviation="in" multiplierToSI="0.0254"
    udunitsSynonym="international_inch">
    <description>unit of length in the (British) imperial and United States systems 
      usually understood as 1/12 f a foot.</description>
  </unit>
  <unit id="Foot_US" name="Foot_US" parentSI="meter" abbreviation="usft" multiplierToSI="0.3048006"
    udunitsSynonym="US_survey_foot">
    <description>12 inches</description>
  </unit>
  <unit id="foot" name="foot" parentSI="meter" abbreviation="ft" multiplierToSI="0.3048"
    udunitsSynonym="international_foot">
    <description>12 inches</description>
  </unit>
  <unit id="Foot_Gold_Coast" name="Foot_Gold_Coast" parentSI="meter" abbreviation="gcft"
    multiplierToSI="0.3047997" udunitsSynonym="">
    <description>12 inches</description>
  </unit>
  <unit id="fathom" name="fathom" parentSI="meter" multiplierToSI="1.8288" udunitsSynonym="fathom">
    <description>6 feet</description>
  </unit>
  <unit id="nauticalMile" name="nauticalMile" parentSI="meter" multiplierToSI="1852"
    udunitsSynonym="nautical_mile">
    <description>defined as exactly 1,852 meters (6,076.1 ft; 1.1508 mi). Historically, 
      defined as one minute of latitude.</description>
  </unit>
  <unit id="yard" name="yard" parentSI="meter" abbreviation="yard" multiplierToSI="0.9144"
    udunitsSynonym="international_yard">
    <description>3 feet</description>
  </unit>
  <unit id="Yard_Indian" name="Yard_Indian" parentSI="meter" multiplierToSI="0.914398530744440774"
    udunitsSynonym="">
    <description>This is an ESRI unit and the multiplier comes from ESRI. It may not be
      accurate.</description>
  </unit>
  <unit id="Link_Clarke" name="Link_Clarke" parentSI="meter" multiplierToSI="0.2011661949"
    udunitsSynonym="">
    <description>This is an ESRI unit and the multiplier comes from ESRI. It may not be
      accurate.</description>
  </unit>
  <unit id="Yard_Sears" name="Yard_Sears" parentSI="meter" multiplierToSI="0.91439841461602867"
    deprecatedInFavorOf="yard" udunitsSynonym="">
    <description>This is an ESRI unit and the multiplier comes from ESRI. It may not be
      accurate.</description>
  </unit>
  <unit id="mile" name="mile" parentSI="meter" abbreviation="mile" multiplierToSI="1609.344"
    udunitsSynonym="international_mile">
    <description>5280 ft or 1609.344 meters</description>
  </unit>

  <!--seconds-->
  <unit id="nanosecond" name="nanosecond" parentSI="second" multiplierToSI="0.000000001"
    abbreviation="nsec" udunitsSynonym="nanosecond">
    <description>1/1000000 of a second</description>
  </unit>
  <unit id="microsecond" name="microsecond" parentSI="second" multiplierToSI="0.000001"
    abbreviation="μsec" udunitsSynonym="microsecond">
    <description>1/100000 of a second</description>
  </unit>
  <unit id="millisecond" name="millisecond" parentSI="second" multiplierToSI="0.001"
    abbreviation="msec" udunitsSynonym="millisecond">
    <description>1/1000 of a second</description>
  </unit>
  <unit id="centisecond" name="centisecond" parentSI="second" multiplierToSI="0.01"
    abbreviation="csec" udunitsSynonym="centisecond">
    <description>1/100 of a second</description>
  </unit>
  <unit id="decisecond" name="decisecond" parentSI="second" multiplierToSI="0.1" abbreviation="dsec"
    udunitsSynonym="decisecond">
    <description>1/10 of a second</description>
  </unit>
  <unit id="dekasecond" name="dekasecond" parentSI="second" multiplierToSI="10" abbreviation="dasec"
    udunitsSynonym="dekasecond">
    <description>10 seconds</description>
  </unit>
  <unit id="hectosecond" name="hectosecond" parentSI="second" multiplierToSI="100"
    abbreviation="hsec" udunitsSynonym="hectosecond">
    <description>100 seconds</description>
  </unit>
  <unit id="kilosecond" name="kilosecond" parentSI="second" multiplierToSI="1000"
    abbreviation="ksec" udunitsSynonym="kilosecond">
    <description>1000 seconds</description>
  </unit>
  <unit id="megasecond" name="megasecond" parentSI="second" multiplierToSI="1000000"
    abbreviation="Msec" udunitsSynonym="megasecond">
    <description>1000000 seconds</description>
  </unit>
  <unit id="minute" name="minute" parentSI="second" multiplierToSI="60" abbreviation="min"
    udunitsSynonym="minute">
    <description>60 seconds</description>
  </unit>
  <unit id="hour" name="hour" parentSI="second" multiplierToSI="3600" abbreviation="hr"
    udunitsSynonym="hour">
    <description>3600 seconds</description>
  </unit>

  <!--volume-->
  <unit id="kiloliter" name="kiloliter" unitType="volume" parentSI="cubicMeter" multiplierToSI="1"
    abbreviation="kL" udunitsSynonym="kiloliter">
    <description>1 cubic meter</description>
  </unit>
  <unit id="microliter" name="microliter" unitType="volume" parentSI="cubicMeter"
    multiplierToSI="0.000000001" abbreviation="μl" udunitsSynonym="microliter">
    <description>1/1000000 of a liter</description>
  </unit>
  <unit id="milliliter" name="milliliter" unitType="volume" parentSI="cubicMeter"
    multiplierToSI="0.000001" abbreviation="ml" udunitsSynonym="milliliter">
    <description>1/1000 of a liter</description>
  </unit>
  <unit id="liter" name="liter" unitType="volume" parentSI="cubicMeter" multiplierToSI="0.001"
    abbreviation="L" udunitsSynonym="liter">
    <description>1000 cm^3</description>
  </unit>

  <unit id="gallon" name="gallon" parentSI="liter" multiplierToSI="3.785412" abbreviation="gal"
    udunitsSynonym="US_liquid_gallon">
    <description>US liquid gallon</description>
  </unit>
  <unit id="quart" name="quart" parentSI="liter" multiplierToSI="0.946353" abbreviation="qt"
    udunitsSynonym="US_liquid_quart">
    <description>US liquid quart</description>
  </unit>

  <unit id="bushel" name="bushel" unitType="volume" parentSI="liter" multiplierToSI="35.23907"
    abbreviation="b" udunitsSynonym="bushel">
    <description>1 bushel = 35.23907 liters</description>
  </unit>

  <unit id="cubicInch" name="cubicInch" parentSI="liter" unitType="volume"
    multiplierToSI="0.01638706" abbreviation="in³" deprecatedInFavorOf="inchCubed"
    udunitsSynonym="international_inch^3">
    <description>cubic inch</description>
  </unit>

  <unit id="pint" name="pint" parentSI="liter" abbreviation="pint" multiplierToSI="0.473176"
    udunitsSynonym="US_liquid_pint">
    <description>US liquid pint</description>
  </unit>

  <unit id="meterCubed" name="meterCubed" unitType="volume" parentSI="meterCubed" multiplierToSI="1"
    abbreviation="m³" udunitsSynonym="meter^3">
    <description>cubic meter</description>
  </unit>
  <unit id="centimeterCubed" name="centimeterCubed" unitType="volume" parentSI="meterCubed"
    multiplierToSI="0.000001" abbreviation="cm³" udunitsSynonym="centimeter^3">
    <description>cubic meter</description>
  </unit>
  <unit id="inchCubed" name="inchCubed" unitType="volume" parentSI="liter"
    multiplierToSI="0.01638706" abbreviation="in³" udunitsSynonym="international_inch^3">
    <description>micromoles per square meter per second</description>
  </unit>

  <!--angles-->
  <unit id="radian" name="radian" unitType="angle" multiplierToSI="1" abbreviation="rad"
    udunitsSynonym="radian">
    <description>2 pi radians comprise a unit circle.</description>
  </unit>
  <unit id="degree" name="degree" unitType="angle" parentSI="radian" multiplierToSI="0.0174532924"
    abbreviation="º" udunitsSynonym="arc_degree">
    <description>360 degrees comprise a unit circle</description>
  </unit>
  <unit id="grad" name="grad" unitType="angle" parentSI="radian" multiplierToSI="0.015707"
    abbreviation="grad" udunitsSynonym="">
    <description>a plane angle equivalent to 1/400 of a full circle</description>
  </unit>
  <unit id="steradian" name="steradian" unitType="angle" multiplierToSI="1" abbreviation="sr"
    udunitsSynonym="steradian">
    <description>standard unit of solid angle measure, it is the solid angle which cuts out an area
      on a sphere that is the square of the sphere's radius; as a ratio of two areas, it has no
      dimension</description>
  </unit>

  <!--frequency-->
  <unit id="megahertz" name="megahertz" unitType="frequency" parentSI="hertz"
    multiplierToSI="1000000" abbreviation="MHz" udunitsSynonym="megahertz">
    <description>megahertz</description>
  </unit>
  <unit id="kilohertz" name="kilohertz" unitType="frequency" parentSI="hertz" multiplierToSI="1000"
    abbreviation="KHz" udunitsSynonym="kilohertz">
    <description>kilohertz</description>
  </unit>
  <unit id="hertz" name="hertz" unitType="frequency" multiplierToSI="1" abbreviation="Hz"
    udunitsSynonym="hertz">
    <description>derived unit of frequency in the SI, defined as one cycle per second</description>
  </unit>
  <unit id="millihertz" name="millihertz" parentSI="hertz" unitType="frequency"
    multiplierToSI="0.001" abbreviation="mHz" udunitsSynonym="millihertz">
    <description>millihertz</description>
  </unit>

  <!--force -->
  <unit id="newton" name="newton" unitType="force" multiplierToSI="1" abbreviation="N"
    udunitsSynonym="newton">
    <description>newton</description>
  </unit>

  <!--energy-->
  <unit id="joule" name="joule" unitType="energy" multiplierToSI="1" abbreviation="J"
    udunitsSynonym="joule">
    <description>joule = N*m</description>
  </unit>
  <unit id="calorie" name="calorie" unitType="energy" parentSI="joule" multiplierToSI="4.1868"
    abbreviation="cal" udunitsSynonym="IT_calorie">
    <description>unit of energy: amount of energy to raise the temperature of one gram of water 
      by one degree Celsius at a pressure of one atmosphere. cal = 4.1868 J</description>
  </unit>
  <unit id="britishThermalUnit" name="britishThermalUnit" unitType="energy" parentSI="joule"
    multiplierToSI="1055.0559" abbreviation="btu" udunitsSynonym="IT_Btu">
    <description>an energy unit: 1 btu = 1055.0559 J</description>
  </unit>
  <unit id="footPound" name="footPound" unitType="energy" parentSI="joule" multiplierToSI="1.355818"
    udunitsSynonym="international_foot pound_force">
    <description>1 ft-lbs = 1.355818 J</description>
  </unit>
  <unit id="langley" name="langley" abbreviation="Ly" 
    unitType="arealEnergyDensity" parentSI="joulePerMeterSquared" multiplierToSI="41840" constantToSI="0"
    udunitsSynonym="langley">
    <description>unit of energy density = 41840 joule/m^2, = 1 calorie/cm^2</description>
  </unit>
  <!--luminosity-->
  <unit id="lumen" name="lumen" unitType="luminosity" multiplierToSI="1" abbreviation="lm"
    udunitsSynonym="lumen">
    <description>SI unit for the total quantity of visible light in a defined beam or angle.
      1 lumen/m^2 = 1 lux. 1 lumen = 1 candela * steradian </description>
  </unit>

  <!--illuminance-->
  <unit id="lux" name="lux" unitType="illuminance" multiplierToSI="1" abbreviation="lx"
    udunitsSynonym="lux">
    <description>SI derived unit for illuminance, or luminous flux per unit area. 1 lx = 1 lm/m^2 = 1 cd * sr/m^2</description>
  </unit>

  <!--radionucleotide Activity-->
  <unit id="becquerel" name="becquerel" unitType="radionucleotideActivity" multiplierToSI="1"
    abbreviation="Bq" udunitsSynonym="becquerel">
    <description>SI derived unit of radioactivity. the activity of a quantity of radioactive material in which 
      one nucleus decays per second, and equivalent to an inverse second, s^-1.</description>
  </unit>

  <!--specific energy-->
  <unit id="gray" name="gray" unitType="specificEnergy" multiplierToSI="1" abbreviation="Gy"
    udunitsSynonym="gray">
    <description>SI derived unit of ionizing radiation, defined as the absorption of one joule of 
      radiation energy per kilogram of matter (= 1 J/kg)</description>
  </unit>

  <!--dose equivalent-->
  <unit id="sievert" name="sievert" unitType="doseEquivalent" multiplierToSI="1" abbreviation="Sv"
    udunitsSynonym="sievert">
    <description>SI derived unit of ionizing radiation dose (health effect of low levels of ionizing 
      radiation on humans). 1 Sv =  100 rem (rem is an older, non-SI unit)</description>
  </unit>

  <!--catalytic activity-->
  <unit id="katal" name="katal" unitType="catalyticActivity" multiplierToSI="1" abbreviation="kat"
    udunitsSynonym="katal">
    <description>derived SI unit for quantifying enzymatic activity.A property of the catalyst 
      (not rate of reaction), expressed in moles/second.</description>
  </unit>

  <!--inductance-->
  <unit id="henry" name="henry" unitType="inductance" multiplierToSI="1" abbreviation="H"
    udunitsSynonym="henry">
    <description>SI derived unit for inductance; in SI base units: kg * m^2 * s^-2 * A^-2</description>
  </unit>

  <!--power-->
  <unit id="megawatt" name="megawatt" unitType="power" parentSI="watt" multiplierToSI="1000000"
    abbreviation="MW" udunitsSynonym="megawatt">
    <description>unit of power, to quantify rate of energy transfer. 1 W = J/s</description>
  </unit>
  <unit id="kilowatt" name="kilowatt" unitType="power" parentSI="watt" multiplierToSI="1000"
    abbreviation="kW" udunitsSynonym="kilowatt">
    <description>unit of power, to quantify rate of energy transfer. 1 W = J/s</description>
  </unit>
  <unit id="watt" name="watt" unitType="power" multiplierToSI="1" abbreviation="W"
    udunitsSynonym="watt">
    <description>unit of power, to quantify rate of energy transfer. 1 W = J/s</description>
  </unit>
  <unit id="milliwatt" name="milliwatt" unitType="power" parentSI="watt" multiplierToSI="0.001"
    abbreviation="mW" udunitsSynonym="milliwatt">
    <description>unit of power, to quantify rate of energy transfer. 1 W = J/s</description>
  </unit>

  <!--potiential difference-->
  <unit id="megavolt" name="megavolt" unitType="potentialDifference" parentSI="volt"
    multiplierToSI="1000000" abbreviation="MV" udunitsSynonym="megavolt">
    <description>Derived unit for electric potential, electric potential difference, 
      and electromotive force. 1 V = kg * m^2 * s^-3 * A^-1</description>
  </unit>
  <unit id="kilovolt" name="kilovolt" unitType="potentialDifference" parentSI="volt"
    multiplierToSI="1000" abbreviation="kV" udunitsSynonym="kilovolt">
    <description>Derived unit for electric potential, electric potential difference, 
      and electromotive force. 1 V = kg * m^2 * s^-3 * A^-1</description>
  </unit>
  <unit id="volt" name="volt" unitType="potentialDifference" multiplierToSI="1" abbreviation="V"
    udunitsSynonym="volt">
    <description>Derived unit for electric potential, electric potential difference, 
      and electromotive force. 1 V = kg * m^2 * s^-3 * A^-1</description>
  </unit>
  <unit id="millivolt" name="millivolt" unitType="potentialDifference" parentSI="volt"
    multiplierToSI="0.001" abbreviation="mV" udunitsSynonym="millivolt">
    <description>Derived unit for electric potential, electric potential difference, 
      and electromotive force. 1 V = kg * m^2 * s^-3 * A^-1</description>
  </unit>

  <!--capacitance-->
  <unit id="farad" name="farad" unitType="capacitance" multiplierToSI="1" abbreviation="F"
    udunitsSynonym="farad">
    <description>SI derived unit of electrical capacitance, the ability of a body to store an 
      electrical charge. 1 F = s^4 * A^2 *m^-2 * kg^-1</description>
  </unit>

  <!--resistance-->
  <unit id="ohm" name="ohm" unitType="resistance" multiplierToSI="1" abbreviation="Ω"
    udunitsSynonym="ohm">
    <description>an electrical resistance between two points of a conductor when a constant potential 
      difference of one volt, 
      applied to these points, produces in the conductor a current of one ampere</description>
  </unit>

  <!--resistivity-->
  <unit id="ohmMeter" name="ohmMeter" unitType="resistivity" multiplierToSI="1" abbreviation="Ωm"
    udunitsSynonym="ohm meter">
    <description>SI unit of electrical resistivity (fundamental property that quantifies how strongly a material 
      opposes the flow of electric current). reciprocal of electrical conductivity. </description>
  </unit>

  <!--conductivity-->
  <unit id="siemensPerMeter" name="siemensPerMeter" unitType="" parentSI="siemensPerMeter"
    multiplierToSI="1" abbreviation="S/m" udunitsSynonym="siemens/meter">
    <description>SI unit for conductivity, measure of a material's ability to conduct an 
      electric current.</description>
  </unit>
  <unit id="siemensPerCentimeter" name="siemensPerCentimeter" unitType="" parentSI="siemensPerMeter"
    multiplierToSI=".01" abbreviation="S/cm" udunitsSynonym="siemens/centimeter">
    <description>SI unit for conductivity, measure of a material's ability to conduct an 
      electric current.</description>
  </unit>
  
  <!--conductance-->
  <unit id="siemen" name="siemen" unitType="conductance" multiplierToSI="1" abbreviation="S"
    deprecatedInFavorOf="siemens" udunitsSynonym="siemens">
    <description>siemens</description>
  </unit>

  <unit id="siemens" name="siemens" unitType="" parentSI="siemens" multiplierToSI="1"
    abbreviation="S" udunitsSynonym="siemens">
    <description>SI derived unit of electric conductance, susceptance and admittance 
      (reciprocals of resistance, reactance, and impedance respectively). One siemens is equal 
      to the reciprocal of one ohm (and also called "mho")</description>
  </unit>

  <!--magneticFlux-->
  <unit id="weber" name="weber" unitType="magneticFlux" multiplierToSI="1" abbreviation="Wb"
    udunitsSynonym="weber">
    <description>the SI unit of magnetic flux</description>
  </unit>

  <!--magneticFluxDensity-->
  <unit id="tesla" name="tesla" unitType="magneticFluxDensity" multiplierToSI="1" abbreviation="T"
    udunitsSynonym="tesla">
    <description>unit for flux density. 1 tesla = 1 Wb/m^2 (one weber per square meter).</description>
  </unit>

  <!--pressure-->
  <unit id="pascal" name="pascal" unitType="pressure" multiplierToSI="1" abbreviation="Pa"
    udunitsSynonym="pascal">
    <description>SI derived unit of pressure, 1 pascal = 1 newton/m^2</description>
  </unit>
  <unit id="megapascal" name="megapascal" unitType="pressure" parentSI="pascal"
    multiplierToSI="1000000" abbreviation="MPa" udunitsSynonym="megapascal">
    <description>SI derived unit of pressure, 1 pascal = 1 newton/m^2</description>
  </unit>
  <unit id="kilopascal" name="kilopascal" unitType="pressure" parentSI="pascal"
    multiplierToSI="1000" abbreviation="kPa" udunitsSynonym="kilopascal">
    <description>SI derived unit of pressure, 1 pascal = 1 newton/m^2</description>
  </unit>
  <unit id="hectopascal" name="hectopascal" parentSI="pascal" unitType="pressure" multiplierToSI="100"
    abbreviation="hPa" udunitsSynonym="hectopascal">
    <description>SI derived unit of pressure, 1 pascal = 1 newton/m^2</description>
  </unit>
  
  <unit id="atmosphere" name="atmosphere" parentSI="pascal" unitType="pressure"
    multiplierToSI="101325" abbreviation="atm" udunitsSynonym="standard_atmosphere">
    <description>unit of pressure defined as 101325 Pa (1.01325 bar), sometimes used as a 
      reference or standard pressure</description>
  </unit>
  <unit id="bar" name="bar" parentSI="pascal" unitType="pressure" multiplierToSI="100000"
    abbreviation="bar" udunitsSynonym="bar">
    <description>non-SI unit for pressure (deprecated in some fields). 1 bar = 100000 Pa</description>
  </unit>
  <unit id="millibar" name="millibar" parentSI="pascal" unitType="pressure" multiplierToSI="100"
    abbreviation="mbar" udunitsSynonym="millibar">
    <description>non-SI unit for pressure (deprecated in some fields). 1 millibar = 1 hPa (100 Pa)</description>
  </unit>
  <unit id="decibar" name="decibar" parentSI="pascal" unitType="pressure" multiplierToSI="10000"
    abbreviation="dbar" udunitsSynonym="decibar">
    <description>non-SI unit for pressure. 1 decibar = .1 bar. Decibars are commonly used in aquatic 
      environments because 1 db is approximately equal to depth in meters.</description>
  </unit>
 

  <!--arealMassDensity-->
  <!--deprecated -->
  <unit id="kilogramsPerSquareMeter" name="kilogramsPerSquareMeter" unitType="arealMassDensity"
    multiplierToSI="1" abbreviation="kg/m²" deprecatedInFavorOf="kilogramPerMeterSquared"
    udunitsSynonym="kilogram/meter^2">
    <description>kilograms per square meter</description>
  </unit>
  <unit id="gramsPerSquareMeter" name="gramsPerSquareMeter" parentSI="kilogramPerMeterSquared"
    unitType="arealMassDensity" multiplierToSI="0.001" abbreviation="g/m²"
    deprecatedInFavorOf="gramPerMeterSquared" udunitsSynonym="gram/meter^2">
    <description>grams per square meter</description>
  </unit>
  <unit id="milligramsPerSquareMeter" name="milligramsPerSquareMeter" unitType="arealMassDensity"
    parentSI="kilogramPerMeterSquared" multiplierToSI="0.000001" abbreviation="mg/m²"
    deprecatedInFavorOf="milligramPerMeterSquared" udunitsSynonym="milligram/meter^2">
    <description>milligrams Per Square Meter</description>
  </unit>
  <unit id="kilogramsPerHectare" name="kilogramsPerHectare" unitType="arealMassDensity"
    parentSI="kilogramPerMeterSquared" multiplierToSI="0.0001"
    deprecatedInFavorOf="kilogramPerHectare" udunitsSynonym="kilogram/hectare">
    <description>kilograms per hectare</description>
  </unit>
  
  <unit id="tonnePerHectare" name="tonnePerHectare" unitType="arealMassDensity"
    parentSI="kilogramPerMeterSquared" multiplierToSI="0.1" udunitsSynonym="metric_ton/hectare">
    <description>metric ton or tonne per hectare</description>
  </unit>
  <unit id="poundsPerSquareInch" name="poundsPerSquareInch" unitType="arealMassDensity" 
    parentSI="kilogramPerMeterSquared" multiplierToSI="703.0696" abbreviation="lbs/in²"
    deprecatedInFavorOf="poundPerInchSquared"
    udunitsSynonym="avoirdupois_pound/international_inch^2">
    <description>lbs/square inch</description>
  </unit>

  <unit id="gramPercentimeterSquared" name="gramPercentimeterSquared" unitType="arealMassDensity"
    parentSI="kilogramPerMeterSquared" multiplierToSI="10" abbreviation="g/cm²"
    udunitsSynonym="gram/cm^2">
    <description>grams per square meter</description>
  </unit>
  <unit id="gramPerMeterSquared" name="gramPerMeterSquared" unitType="arealMassDensity"
    parentSI="kilogramPerMeterSquared" multiplierToSI="0.001" abbreviation="g/m²"
    udunitsSynonym="gram/meter^2">
    <description>grams per square meter</description>
  </unit>
  <unit id="kilogramPerHectare" name="kilogramPerHectare" unitType="arealMassDensity"
    parentSI="kilogramPerMeterSquared" multiplierToSI="0.0001" abbreviation="kg/hectare"
    udunitsSynonym="kilogram/hectare">
    <description>kilograms per hectare</description>
  </unit>
  <unit id="kilogramPerMeterSquared" name="kilogramPerMeterSquared" unitType="arealMassDensity"
    parentSI="kilogramPerMeterSquared" multiplierToSI="1" abbreviation="kg/m²"
    udunitsSynonym="kilogram/meter^2">
    <description>kilograms per square meter</description>
  </unit>
  <unit id="milligramPerMeterSquared" name="milligramPerMeterSquared" unitType="arealMassDensity"
    parentSI="kilogramPerMeterSquared" multiplierToSI="0.000001" abbreviation="mg/m²"
    udunitsSynonym="milligram/meter^2">
    <description>milligrams Per Square Meter</description>
  </unit>
  <unit id="poundPerAcre" name="poundPerAcre" unitType="arealMassDensity"
    parentSI="kilogramPerMeterSquared" multiplierToSI="0.000112084667279431" abbreviation="lb/acre"
    udunitsSynonym="avoirdupois_pound/acre">
    <description>avoirdupois pounds per acre</description>
  </unit>
  <unit id="poundPerInchSquared" name="poundPerInchSquared" unitType="arealMassDensity"
    parentSI="kilogramPerMeterSquared" multiplierToSI="703.0696" abbreviation="lbs/in²"
    udunitsSynonym="avoirdupois_pound/international_inch^2">
    <description>avoirdupois pounds per square inch</description>
  </unit>


  <!--massDensity-->
  <unit id="kilogramPerCubicMeter" name="kilogramPerCubicMeter" unitType="massDensity"
    multiplierToSI="1" deprecatedInFavorOf="kilogramPerMeterCubed" udunitsSynonym="kilogram/meter^3">
    <description>kilogram per cubic meter</description>
  </unit>
  
  <unit id="milliGramsPerMilliLiter" name="milliGramsPerMilliLiter" unitType="massDensity"
    parentSI="kilogramPerMeterCubed" multiplierToSI="1" abbreviation="kg/m³"
    deprecatedInFavorOf="milligramPerMilliliter" udunitsSynonym="milligram/milliliter">
    <description>milligrams per milliliter</description>
  </unit>
  <unit id="gramsPerLiter" name="gramsPerLiter" unitType="massDensity"
    parentSI="kilogramPerMeterCubed" multiplierToSI="1" abbreviation="g/l"
    deprecatedInFavorOf="gramPerLiter" udunitsSynonym="gram/liter">
    <description>grams per liter</description>
  </unit>
  <unit id="milligramsPerCubicMeter" name="milligramsPerCubicMeter" unitType="massDensity"
    parentSI="kilogramPerMeterCubed" multiplierToSI="0.000001" abbreviation="mg/m³"
    deprecatedInFavorOf="milligramPerMeterCubed" udunitsSynonym="milligram/meter^3">
    <description>milligrams Per Cubic Meter</description>
  </unit>
  <unit id="microgramsPerLiter" name="microgramsPerLiter" unitType="massDensity"
    parentSI="kilogramPerMeterCubed" multiplierToSI="0.000001" abbreviation="μg/l"
    deprecatedInFavorOf="microgramPerLiter" udunitsSynonym="microgram/liter">
    <description>micrograms/liter</description>
  </unit>
  <unit id="milligramsPerLiter" name="milligramsPerLiter" unitType="massDensity"
    parentSI="kilogramPerMeterCubed" multiplierToSI="0.001" abbreviation="mg/l"
    deprecatedInFavorOf="milligramPerLiter" udunitsSynonym="milligram/liter">
    <description>milligrams/liter</description>
  </unit>
  <unit id="gramsPerCubicCentimeter" name="gramsPerCubicCentimeter" unitType="massDensity"
    parentSI="kilogramPerMeterCubed" multiplierToSI="1000" abbreviation="g/cm³"
    deprecatedInFavorOf="gramPerCentimeterCubed" udunitsSynonym="gram/centimeter^3">
    <description>grams per cubic centimeter</description>
  </unit>
  <unit id="gramsPerMilliliter" name="gramsPerMilliliter" unitType="massDensity"
    parentSI="kilogramPerMeterCubed" multiplierToSI="1000" abbreviation="g/ml"
    deprecatedInFavorOf="gramPerMilliliter" udunitsSynonym="gram/milliliter">
    <description>grams per milliliter</description>
  </unit>

  <unit id="gramPerCentimeterCubed" name="gramPerCentimeterCubed" unitType="massDensity"
    parentSI="kilogramPerMeterCubed" multiplierToSI="1000" abbreviation="g/cm³"
    udunitsSynonym="gram/centimeter^3">
    <description>grams per cubic centimeter</description>
  </unit>
  <unit id="gramPerLiter" name="gramPerLiter" unitType="massDensity"
    parentSI="kilogramPerMeterCubed" multiplierToSI="1" abbreviation="g/l"
    udunitsSynonym="gram/liter">
    <description>grams per liter</description>
  </unit>
  <unit id="gramPerMilliliter" name="gramPerMilliliter" unitType="massDensity"
    parentSI="kilogramPerMeterCubed" multiplierToSI="1000" abbreviation="g/ml"
    udunitsSynonym="gram/milliliter">
    <description>grams per milliliter</description>
  </unit>
  <unit id="microgramPerLiter" name="microgramPerLiter" unitType="massDensity"
    parentSI="kilogramPerMeterCubed" multiplierToSI="0.000001" abbreviation="μg/l"
    udunitsSynonym="microgram/liter">
    <description>micrograms/liter</description>
  </unit>
  <unit id="milligramPerLiter" name="milligramPerLiter" unitType="massDensity"
    parentSI="kilogramPerMeterCubed" multiplierToSI="0.001" abbreviation="mg/l"
    udunitsSynonym="milligram/liter">
    <description>milligrams/liter</description>
  </unit>
  <unit id="milligramPerMeterCubed" name="milligramPerMeterCubed" unitType="massDensity"
    parentSI="kilogramPerMeterCubed" multiplierToSI="0.000001" abbreviation="mg/m³"
    udunitsSynonym="milligram/meter^3">
    <description>milligrams Per Cubic Meter</description>
  </unit>
  <unit id="kilogramPerMeterCubed" name="kilogramPerMeterCubed" unitType="massDensity"
    parentSI="kilogramPerMeterCubed" multiplierToSI="1" abbreviation="kg/m³"
    udunitsSynonym="kilogram/meter^3">
    <description>kilograms per cubic meter</description>
  </unit>
  <unit id="megagramPerMeterCubed" name="megagramPerMeterCubed" unitType="massDensity"
    parentSI="kilogramPerMeterCubed" multiplierToSI="1000" abbreviation="Mg/m³"
    udunitsSynonym="megagram/meter^3">
    <description>megagrams per cubic meter</description>
  </unit>
  <unit id="milligramPerMilliliter" name="milligramPerMilliliter" unitType="massDensity"
    parentSI="kilogramPerMeterCubed" multiplierToSI="1" abbreviation="mg/ml"
    udunitsSynonym="milligram/milliliter">
    <description>micromoles per square meter per second</description>
  </unit>


  <!--volumetricMassDensityRate-->
  <unit id="gramsPerLiterPerDay" name="gramsPerLiterPerDay" unitType="volumetricMassDensityRate"
    multiplierToSI="1" deprecatedInFavorOf="gramPerDayPerLiter" udunitsSynonym="gram/liter/day">
    <description>grams Per (Liter Per Day)</description>
  </unit>
  <unit id="milligramPerMeterCubedPerDay" name="milligramPerMeterCubedPerDay"
    unitType="volumetricMassDensityRate" parentSI="kilogramPerMeterCubedPerSecond" multiplierToSI="0.0000015741"
    abbreviation="mg/m3/d" udunitsSynonym="milligram/meter^3/day">
    <description>milligram per cubic meter per day</description>
  </unit>




  <unit id="gramPerDayPerLiter" name="gramPerDayPerLiter" unitType="volumetricMassDensityRate"
    parentSI="gramPerDayPerLiter" multiplierToSI="1" abbreviation="g/d/l"
    udunitsSynonym="gram/day/liter">
    <description>grams Per (Liter Per Day)</description>
  </unit>

  <!--volumetricRate-->
  <unit id="litersPerSecond" name="litersPerSecond" unitType="volumetricRate" multiplierToSI="1"
    abbreviation="l/s" deprecatedInFavorOf="literPerSecond" udunitsSynonym="liter/second">
    <description>liters per second</description>
  </unit>
  <unit id="cubicMetersPerSecond" name="cubicMetersPerSecond" unitType="volumetricRate"
    parentSI="literPerSecond" multiplierToSI="1000" abbreviation="m³/s"
    deprecatedInFavorOf="meterCubedPerSecond" udunitsSynonym="meter^3/second">
    <description>cubic meters per second</description>
  </unit>
  <unit id="cubicFeetPerSecond" name="cubicFeetPerSecond" unitType="volumetricRate"
    parentSI="literPerSecond" multiplierToSI="28.316874" abbreviation="ft³/s"
    deprecatedInFavorOf="footCubedPerSecond" udunitsSynonym="international_foot^3/second">
    <description>cubic feet per second</description>
  </unit>

  <unit id="footCubedPerSecond" name="footCubedPerSecond" unitType="volumetricRate"
    parentSI="literPerSecond" multiplierToSI="28.316874" abbreviation="ft³/s"
    udunitsSynonym="international_foot^3/second">
    <description>cubic feet per second</description>
  </unit>
  <unit id="literPerSecond" name="literPerSecond" unitType="volumetricRate"
    parentSI="literPerSecond" multiplierToSI="1" abbreviation="l/s" udunitsSynonym="liter/second">
    <description>liters per second</description>
  </unit>
  <unit id="meterCubedPerSecond" name="meterCubedPerSecond" unitType="volumetricRate"
    parentSI="literPerSecond" multiplierToSI="1000" abbreviation="m³/s"
    udunitsSynonym="meter^3/second">
    <description>cubic meters per second</description>
  </unit>


  <!--area-->
  <unit id="squareMeter" name="squareMeter" unitType="area" multiplierToSI="1" abbreviation="m²"
    deprecatedInFavorOf="meterSquared" udunitsSynonym="meter^2">
    <description>square meters</description>
  </unit>
  <unit id="are" name="are" unitType="area" parentSI="squareMeter" multiplierToSI="100"
    abbreviation="a" udunitsSynonym="are">
    <description>100 square meters</description>
  </unit>
  <unit id="hectare" name="hectare" unitType="area" parentSI="squareMeter" multiplierToSI="10000"
    abbreviation="ha" udunitsSynonym="hectare">
    <description>1 hectare is 10^4 square meters</description>
  </unit>
  <unit id="squareKilometers" name="squareKilometers" unitType="area" parentSI="squareMeter"
    multiplierToSI="1000000" deprecatedInFavorOf="kilometerSquared" udunitsSynonym="kilometer^2">
    <description>square kilometers</description>
  </unit>
  <unit id="squareMillimeters" name="squareMillimeters" unitType="area" parentSI="squareMeter"
    multiplierToSI="0.000001" deprecatedInFavorOf="millimeterSquared" udunitsSynonym="millimeter^2">
    <description>square millmeters</description>
  </unit>
  <unit id="squareCentimeters" name="squareCentimeters" unitType="area" parentSI="squareMeter"
    multiplierToSI="0.0001" deprecatedInFavorOf="centimeterSquared" udunitsSynonym="centimeter^2">
    <description>square centimeters</description>
  </unit>

  <unit id="acre" name="acre" unitType="area" parentSI="squareMeter" multiplierToSI="4046.8564"
    abbreviation="a" udunitsSynonym="acre">
    <description>1 acre = 4046.8564 square meters or 1 hectare = 2.4710 acres</description>
  </unit>

  <unit id="squareFoot" name="squareFoot" unitType="area" parentSI="squareMeter"
    multiplierToSI="0.092903" abbreviation="ft²" deprecatedInFavorOf="footSquared"
    udunitsSynonym="international_foot^2">
    <description>12 inches squared</description>
  </unit>
  <unit id="squareYard" name="squareYard" unitType="area" parentSI="squareMeter"
    multiplierToSI="0.836131" abbreviation="yd²" deprecatedInFavorOf="yardSquared"
    udunitsSynonym="international_yard^2">
    <description>36 inches squared</description>
  </unit>
  <unit id="squareMile" name="squareMile" unitType="area" parentSI="squareMeter"
    multiplierToSI="2589998.49806" abbreviation="mile²" deprecatedInFavorOf="mileSquared"
    udunitsSynonym="international_mile^2">
    <description>1 mile squared</description>
  </unit>

  <unit id="centimeterSquared" name="centimeterSquared" unitType="area" parentSI="meterSquared"
    multiplierToSI="0.0001" abbreviation="cm²" udunitsSynonym="centimeter^2">
    <description>square centimeter</description>
  </unit>
  <unit id="footSquared" name="footSquared" unitType="area" parentSI="meterSquared"
    multiplierToSI="0.092903" abbreviation="ft²" udunitsSynonym="international_foot^2">
    <description>12 inches squared</description>
  </unit>
  <unit id="kilometerSquared" name="kilometerSquared" unitType="area" parentSI="meterSquared"
    multiplierToSI="1000000" abbreviation="km²" udunitsSynonym="kilometer^2">
    <description>square kilometer</description>
  </unit>
  <unit id="meterSquared" name="meterSquared" unitType="area" parentSI="meterSquared"
    multiplierToSI="1" abbreviation="m²" udunitsSynonym="meter^2">
    <description>square meters</description>
  </unit>
  <unit id="mileSquared" name="mileSquared" unitType="area" parentSI="meterSquared"
    multiplierToSI="2589998.49806" abbreviation="mile²" udunitsSynonym="international_mile^2">
    <description>1 mile squared</description>
  </unit>
  <unit id="millimeterSquared" name="millimeterSquared" unitType="area" parentSI="meterSquared"
    multiplierToSI="0.000001" abbreviation="mm²" udunitsSynonym="millimeter^2">
    <description>square millimeter</description>
  </unit>
  <unit id="yardSquared" name="yardSquared" unitType="area" parentSI="meterSquared"
    multiplierToSI="0.836131" abbreviation="yd²" udunitsSynonym="international_yard^2">
    <description>36 inches squared</description>
  </unit>

  <!--volumetricArea-->
  <unit id="litersPerSquareMeter" name="litersPerSquareMeter" unitType="volumetricArea"
    multiplierToSI="1" abbreviation="l/m²" deprecatedInFavorOf="literPerMeterSquared"
    udunitsSynonym="liter/meter^2">
    <description>liters per square meter</description>
  </unit>
  <unit id="bushelsPerAcre" name="bushelsPerAcre" unitType="volumetricArea"
    parentSI="literPerMeterSquared" multiplierToSI="0.00870" deprecatedInFavorOf="bushelPerAcre"
    udunitsSynonym="bushel/acre">
    <description>bushels per acre, 1 bushel = 35.23907 liters/1 acre = 4046.8564
      squareMeters</description>
  </unit>
  <unit id="litersPerHectare" name="litersPerHectare" unitType="volumetricArea"
    parentSI="literPerMeterSquared" multiplierToSI="0.0001" deprecatedInFavorOf="literPerHectare"
    udunitsSynonym="liter/hectare">
    <description>liters per hectare</description>
  </unit>

  <unit id="bushelPerAcre" name="bushelPerAcre" unitType="volumetricArea"
    parentSI="literPerMeterSquared" multiplierToSI="0.00870" abbreviation="bu/acre"
    udunitsSynonym="bushel/acre">
    <description>bushels per acre, 1 bushel = 35.23907 liters/1 acre = 4046.8564
      squareMeters</description>
  </unit>
  <unit id="literPerHectare" name="literPerHectare" unitType="volumetricArea"
    parentSI="literPerMeterSquared" multiplierToSI="0.0001" abbreviation="l/hectare"
    udunitsSynonym="liter/hectare">
    <description>liters per hectare</description>
  </unit>
  <unit id="literPerMeterSquared" name="literPerMeterSquared" unitType="volumetricArea"
    parentSI="literPerMeterSquared" multiplierToSI="1" abbreviation="l/m²"
    udunitsSynonym="liter/meter^2">
    <description>liters per square meter</description>
  </unit>
  <unit id="meterCubedPerHectare" name="meterCubedPerHectare" unitType="volumetricArea"
    parentSI="meterCubedPerMeterSquared" multiplierToSI="0.0001" abbreviation="m3/ha"
    udunitsSynonym="m^3/hectare">
    <description>meter cubed per hectare</description>
  </unit>
  <unit id="meterCubedPerMeterSquared" name="meterCubedPerMeterSquared" unitType="volumetricArea"
    parentSI="meterCubedPerMeterSquared" multiplierToSI="1" abbreviation="m^3/m^2"
    udunitsSynonym="m^3/m^2">
    <description>meter cubed per meter squared</description>
  </unit>
  
  <!-- area ratio -->
  <unit id="meterSquaredPerHectare" name="meterSquaredPerHectare" unitType="volumetricArea"
    parentSI="meterSquaredPerMeterSquared" multiplierToSI="0.0001" abbreviation="m^2/ha"
    udunitsSynonym="m^2/hectare">
    <description>meter squared per hectare</description>
  </unit>

  <!--specificArea-->
  <unit id="squareMeterPerKilogram" name="squareMeterPerKilogram" unitType="specificArea"
    multiplierToSI="1" abbreviation="m²/kg" deprecatedInFavorOf="meterSquaredPerKilogram"
    udunitsSynonym="meter^2/kilogram">
    <description>square meters per kilogram</description>
  </unit>

  <unit id="meterSquaredPerKilogram" name="meterSquaredPerKilogram" unitType="specificArea"
    parentSI="meterSquaredPerKilogram" multiplierToSI="1" abbreviation="m²/kg"
    udunitsSynonym="meter^2/kilogram">
    <description>square meters per kilogram</description>
  </unit>

  <!--speed (length per time) -->
  <unit id="metersPerSecond" name="metersPerSecond" unitType="speed" parentSI="meterPerSecond"
    multiplierToSI="1" abbreviation="m/s" deprecatedInFavorOf="meterPerSecond"
    udunitsSynonym="meter/second">
    <description>meters per second</description>
  </unit>
  <unit id="metersPerDay" name="metersPerDay" unitType="speed" multiplierToSI=".0000115741"
    abbreviation="m/day" deprecatedInFavorOf="meterPerDay" udunitsSynonym="meter/day">
    <description>meters per day</description>
  </unit>
  <unit id="feetPerDay" name="feetPerDay" unitType="speed" parentSI="meterPerSecond"
    multiplierToSI="0.00000352778" abbreviation="ft/day" deprecatedInFavorOf="footPerDay"
    udunitsSynonym="international_foot/day">
    <description>feet per day</description>
  </unit>
  <unit id="feetPerSecond" name="feetPerSecond" unitType="speed" parentSI="meterPerSecond"
    multiplierToSI="0.3048" abbreviation="ft/s" deprecatedInFavorOf="footPerSecond"
    udunitsSynonym="international_foot/second">
    <description>feet per second</description>
  </unit>
  <unit id="feetPerHour" name="feetPerHour" unitType="speed" parentSI="meterPerSecond"
    multiplierToSI="0.000084667" abbreviation="ft/hr" deprecatedInFavorOf="footPerHour"
    udunitsSynonym="international_foot/hour">
    <description>feet per hour</description>
  </unit>
  <unit id="yardsPerSecond" name="yardsPerSecond" unitType="speed" parentSI="meterPerSecond"
    multiplierToSI="0.9144" abbreviation="yd/s" deprecatedInFavorOf="yardPerSecond"
    udunitsSynonym="international_yard/second">
    <description>yards per second</description>
  </unit>
  <unit id="milesPerHour" name="milesPerHour" unitType="speed" parentSI="meterPerSecond"
    multiplierToSI="0.44704" abbreviation="mph" deprecatedInFavorOf="milePerHour"
    udunitsSynonym="international_mile/hour">
    <description>miles per hour</description>
  </unit>
  <unit id="milesPerSecond" name="milesPerSecond" unitType="speed" parentSI="meterPerSecond"
    multiplierToSI="1609.344" abbreviation="mps" deprecatedInFavorOf="milePerSecond"
    udunitsSynonym="international_mile/second">
    <description>miles per second</description>
  </unit>
  <unit id="milesPerMinute" name="milesPerMinute" unitType="speed" parentSI="meterPerSecond"
    multiplierToSI="26.8224" abbreviation="mpm" deprecatedInFavorOf="milePerMinute"
    udunitsSynonym="international_mile/minute">
    <description>miles per minute</description>
  </unit>
  <unit id="centimetersPerSecond" name="centimetersPerSecond" unitType="speed"
    parentSI="meterPerSecond" multiplierToSI="0.01" abbreviation="cm/s"
    deprecatedInFavorOf="centimeterPerSecond" udunitsSynonym="centimeter/second">
    <description>centimeters per second</description>
  </unit>
  <unit id="millimetersPerSecond" name="millimetersPerSecond" unitType="speed"
    parentSI="meterPerSecond" multiplierToSI="0.001" abbreviation="mm/s"
    deprecatedInFavorOf="millimeterPerSecond" udunitsSynonym="millimeter/second">
    <description>millimeters per second</description>
  </unit>
  <unit id="centimeterPerYear" name="centimeterPerYear" unitType="speed" parentSI="meterPerSecond"
    multiplierToSI="0.000000000317098" abbreviation="cm/year"
    deprecatedInFavorOf="centimeterPerYear" udunitsSynonym="centimeter/common_year">
    <description>centimeter Per Year</description>
  </unit>
  <unit id="knots" name="knots" unitType="speed" parentSI="meterPerSecond"
    multiplierToSI="0.514444" deprecatedInFavorOf="knot" udunitsSynonym="international_knot">
    <description>knots</description>
  </unit>
  <unit id="kilometersPerHour" name="kilometersPerHour" unitType="speed" parentSI="meterPerSecond"
    multiplierToSI="0.2778" abbreviation="km/hr" deprecatedInFavorOf="kilometerPerHour"
    udunitsSynonym="kilometer/hour">
    <description>km/hr</description>
  </unit>

  <unit id="centimeterPerSecond" name="centimeterPerSecond" unitType="speed"
    parentSI="meterPerSecond" multiplierToSI="0.01" abbreviation="cm/s"
    udunitsSynonym="centimeter/second">
    <description>centimeters per second</description>
  </unit>
  <unit id="footPerDay" name="footPerDay" unitType="speed" parentSI="meterPerSecond"
    multiplierToSI="0.00000352778" abbreviation="ft/day" udunitsSynonym="international_foot/day">
    <description>feet per day</description>
  </unit>
  <unit id="footPerHour" name="footPerHour" unitType="speed" parentSI="meterPerSecond"
    multiplierToSI="0.000084667" abbreviation="ft/hr" udunitsSynonym="international_foot/hour">
    <description>feet per hour</description>
  </unit>
  <unit id="footPerSecond" name="footPerSecond" unitType="speed" parentSI="meterPerSecond"
    multiplierToSI="0.3048" abbreviation="ft/s" udunitsSynonym="international_foot/second">
    <description>feet per second</description>
  </unit>
  <unit id="inchPerHour" name="inchPerHour" unitType="speed" parentSI="meterPerSecond"
    multiplierToSI="0.00000705556" abbreviation="in/hr" 
    udunitsSynonym="international_inch/hour">
    <description>inches per hour</description>
  </unit>
  <unit id="kilometerPerHour" name="kilometerPerHour" unitType="speed" parentSI="meterPerSecond"
    multiplierToSI="0.2778" abbreviation="km/hr" udunitsSynonym="kilometer/hour">
    <description>km/hr</description>
  </unit>
  <unit id="knot" name="knot" unitType="speed" parentSI="meterPerSecond"
    multiplierToSI="0.514444444444444" abbreviation="knot" udunitsSynonym="international_knot">
    <description>unit of speed equal to one nautical mile per hour, exactly 1.852 km/hour</description>
  </unit>
  <unit id="meterPerDay" name="meterPerDay" unitType="speed" parentSI="meterPerSecond"
    multiplierToSI=".0000115741" abbreviation="m/day" udunitsSynonym="meter/day">
    <description>meters per day</description>
  </unit>
  <unit id="meterPerSecond" name="meterPerSecond" unitType="speed" parentSI="meterPerSecond"
    multiplierToSI="1" abbreviation="m/s" udunitsSynonym="meter/second">
    <description>meters per second</description>
  </unit>
  <unit id="milePerHour" name="milePerHour" unitType="speed" parentSI="meterPerSecond"
    multiplierToSI="0.44704" abbreviation="mph" udunitsSynonym="international_mile/hour">
    <description>miles per hour</description>
  </unit>
  <unit id="milePerMinute" name="milePerMinute" unitType="speed" parentSI="meterPerSecond"
    multiplierToSI="26.8224" abbreviation="mpm" udunitsSynonym="international_mile/minute">
    <description>miles per minute</description>
  </unit>
  <unit id="milePerSecond" name="milePerSecond" unitType="speed" parentSI="meterPerSecond"
    multiplierToSI="1609.344" abbreviation="mps" udunitsSynonym="international_mile/second">
    <description>miles per second</description>
  </unit>
  <unit id="millimeterPerDay" name="millimeterPerDay" unitType="speed" parentSI="meterPerSecond"
    multiplierToSI="0.00000001157407" abbreviation="mm/d" udunitsSynonym="millimeter/day">
    <description>millimeters per day</description>
  </unit>
  <unit id="millimeterPerSecond" name="millimeterPerSecond" unitType="speed"
    parentSI="meterPerSecond" multiplierToSI="0.001" abbreviation="mm/s"
    udunitsSynonym="millimeter/second">
    <description>millimeters per second</description>
  </unit>
  <unit id="yardPerSecond" name="yardPerSecond" unitType="speed" parentSI="meterPerSecond"
    multiplierToSI="0.9144" abbreviation="yd/s" udunitsSynonym="international_yard/second">
    <description>yards per second</description>
  </unit>

  <!--acceleration-->
  <unit id="metersPerSecondSquared" name="metersPerSecondSquared" unitType="acceleration"
    multiplierToSI="1" abbreviation="m/s²" deprecatedInFavorOf="meterPerSecondSquared"
    udunitsSynonym="meter/second^2">
    <description>meters per second squared</description>
  </unit>

  <unit id="meterPerSecondSquared" name="meterPerSecondSquared" unitType="acceleration"
    parentSI="meterPerSecondSquared" multiplierToSI="1" abbreviation="m/s²"
    udunitsSynonym="meter/second^2">
    <description>micromoles per square meter per second</description>
  </unit>

  <!--reciprocal lengths-->
  <unit id="waveNumber" name="waveNumber" unitType="lengthReciprocal" multiplierToSI="1"
    deprecatedInFavorOf="inverseMeter" udunitsSynonym="meter^-1">
    <description>1/meters</description>
  </unit>
  <unit id="inverseMeter" name="inverseMeter" unitType="lengthReciprocal" multiplierToSI="1"
    udunitsSynonym="meter^-1">
    <description>reciprocal of meter, or 1/meters</description>
  </unit>
  <unit id="inverseCentimeter" name="inverseCentimeter" unitType="lengthReciprocal"
    multiplierToSI=".01" udunitsSynonym="meter^-1">
    <description>also called reciprocal centimeter</description>
  </unit>

  <!--specificVolume-->
  <unit id="cubicMeterPerKilogram" name="cubicMeterPerKilogram" unitType="specificVolume"
    multiplierToSI="1" abbreviation="m³/kg" deprecatedInFavorOf="meterCubedPerKilogram"
    udunitsSynonym="meter^3/kilogram">
    <description>cubic meters per kilogram</description>
  </unit>

  <unit id="cubicMicrometersPerGram" name="cubicMicrometersPerGram" unitType="specificVolume"
    parentSI="cubicMeterPerKilogram" multiplierToSI="0.000000000000001" abbreviation="μm³/kg"
    deprecatedInFavorOf="micrometerCubedPerGram" udunitsSynonym="micrometer^3/gram">
    <description>cubic micrometers per gram</description>
  </unit>

  <unit id="meterCubedPerKilogram" name="meterCubedPerKilogram" unitType="specificVolume"
    parentSI="meterCubedPerKilogram" multiplierToSI="1" abbreviation="m³/kg"
    udunitsSynonym="meter^3/kilogram">
    <description>cubic meters per kilogram</description>
  </unit>
  <unit id="micrometerCubedPerGram" name="micrometerCubedPerGram" unitType="specificVolume"
    parentSI="meterCubedPerKilogram" multiplierToSI="0.000000000000001" abbreviation="μm³/kg"
    udunitsSynonym="micrometer^3/gram">
    <description>cubic micrometers per gram</description>
  </unit>

  <!--currentDensity-->
  <unit id="amperePerSquareMeter" name="amperePerSquareMeter" unitType="currentDensity"
    multiplierToSI="1" abbreviation="A/m²" deprecatedInFavorOf="amperePerMeterSquared"
    udunitsSynonym="ampere/meter^2">
    <description>ampere per meter squared, unit of current density</description>
  </unit>

  <unit id="amperePerMeterSquared" name="amperePerMeterSquared" unitType="currentDensity"
    parentSI="amperePerMeterSquared" multiplierToSI="1" abbreviation="A/m²"
    udunitsSynonym="ampere/meter^2">
    <description>amperes per square meter, unit of current density</description>
  </unit>

  <!--magneticFieldStrength-->
  <unit id="amperePerMeter" name="amperePerMeter" unitType="magneticFieldStrength"
    multiplierToSI="1" abbreviation="A/m" udunitsSynonym="ampere/meter">
    <description>ampere per meter</description>
  </unit>

  <!--amountOfSubstanceConcentration-->
  <unit id="molePerCubicMeter" name="molePerCubicMeter" unitType="amountOfSubstanceConcentration"
    multiplierToSI="1" deprecatedInFavorOf="molePerMeterCubed" udunitsSynonym="mole/meter^3">
    <description>mole per cubic meter</description>
  </unit>
  <unit id="molarity" name="molarity" unitType="amountOfSubstanceConcentration"
    parentSI="molePerMeterCubed" multiplierToSI="1000" abbreviation="M"
    deprecatedInFavorOf="molePerLiter" udunitsSynonym="mole/liter">
    <description>molarity = moles/liter</description>
  </unit>

  <unit id="molePerMeterCubed" name="molePerMeterCubed" unitType="amountOfSubstanceConcentration"
    parentSI="molePerMeterCubed" multiplierToSI="1" abbreviation="mol/m³"
    udunitsSynonym="mole/meter^3">
    <description>moles per cubic meter</description>
  </unit>
  <unit id="molePerLiter" name="molePerLiter" unitType="amountOfSubstanceConcentration"
    parentSI="molePerMeterCubed" multiplierToSI="1000" abbreviation="mol/l"
    udunitsSynonym="mole/liter">
    <description>moles per liter (perferred over molarity, as molarity refers only to dissolved substances)</description>
  </unit>
  <unit id="millimolePerLiter" name="millimolePerLiter" unitType="amountOfSubstanceConcentration"
    parentSI="molePerMeterCubed" multiplierToSI="1" abbreviation="mmol/l"
    udunitsSynonym="millimole/liter">
    <description>millimoles per liter </description>
  </unit>
  <unit id="micromolePerLiter" name="micromolePerLiter" unitType="amountOfSubstanceConcentration"
    parentSI="molePerMeterCubed" multiplierToSI="0.001" abbreviation="µmol/l"
    udunitsSynonym="micromole/liter">
    <description>micromoles per liter</description>
  </unit>
  <unit id="nanomolePerLiter" name="nanomolePerLiter" unitType="amountOfSubstanceConcentration"
    parentSI="molePerMeterCubed" multiplierToSI="0.000001" abbreviation="nmol/l"
    udunitsSynonym="nanomole/liter">
    <description>nanomoles per liter</description>
  </unit>
  <unit id="millimolePerMeterCubed" name="millimolePerMeterCubed" unitType="amountOfSubstanceConcentration"
    parentSI="molePerMeterCubed" multiplierToSI=".001" abbreviation="mol/m³"
    udunitsSynonym="millimole/meter^3">
    <description>millimoles per cubic meter</description>
  </unit>
  <!-- concentration of charge -->
  <unit id="microequivalentPerLiter" name="microequivalentPerLiter" unitType="amountOfSubstanceConcentration"
    parentSI="molePerMeterCubed" abbreviation="E/l">
    <description>concentration of charge (on dissolved ions). conversions must know the name of the ion; 
      a single multiplier to SI is not possible</description>
  </unit>
  <unit id="milliequivalentPerLiter" name="milliequivalentPerLiter" unitType="amountOfSubstanceConcentration"
    parentSI="molePerMeterCubed" abbreviation="mE/l">
    <description>concentration of charge (on dissolved ions). conversions must know the name of the ion; 
      a single multiplier to SI is not possible</description>
  </unit>
  <unit id="equivalentPerLiter" name="equivalentPerLiter" unitType="amountOfSubstanceConcentration"
    parentSI="molePerMeterCubed" abbreviation="µE/l">
    <description>concentration of charge (on dissolved ions). conversions must know the name of the ion; 
      a single multiplier to SI is not possible</description>
  </unit>
  
  
  <!--amountOfSubstanceWeight-->
  <unit id="molality" name="molality" unitType="amountOfSubstanceWeight" multiplierToSI="1"
    abbreviation="m" deprecatedInFavorOf="molePerKilogram" udunitsSynonym="mole/kilogram">
    <description>molality = moles/kg</description>
  </unit>

  <unit id="millimolePerGram" name="millimolePerGram" unitType="amountOfSubstanceWeight"
    parentSI="molePerKilogram" multiplierToSI="1" abbreviation="mmol/g"
    udunitsSynonym="millimole/gram">
    <description>millimoles per gram</description>
  </unit>
  <unit id="molePerGram" name="molePerGram" unitType="amountOfSubstanceWeight"
    parentSI="molePerKilogram" multiplierToSI="1000" abbreviation="mol/g" udunitsSynonym="mole/gram">
    <description>moles per gram</description>
  </unit>
  <unit id="molePerKilogram" name="molePerKilogram" unitType="amountOfSubstanceWeight"
    parentSI="molePerKilogram" multiplierToSI="1" abbreviation="mol/kg"
    udunitsSynonym="mole/kilogram">
    <description>moles per kilogram</description>
  </unit>
  <unit id="micromolePerGram" name="micromolePerGram" unitType="amountOfSubstanceWeight"
    parentSI="molePerKilogram" multiplierToSI="0.001" abbreviation="umol/g"
    udunitsSynonym="micromole/gram">
    <description>millimoles per gram</description>
  </unit>

  <!--luminance-->
  <unit id="candelaPerSquareMeter" name="candelaPerSquareMeter" unitType="luminance"
    multiplierToSI="1" abbreviation="cd/m²" deprecatedInFavorOf="candelaPerMeterSquared"
    udunitsSynonym="candela/meter^2">
    <description>candela Per Square Meter (1 lux)</description>
  </unit>

  <unit id="candelaPerMeterSquared" name="candelaPerMeterSquared" unitType="luminance"
    parentSI="candelaPerMeterSquared" multiplierToSI="1" abbreviation="cd/m²"
    udunitsSynonym="candela/meter^2">
    <description>candela Per Square Meter (1 lux)</description>
  </unit>

  <!--transmissivity-->
  <unit id="metersSquaredPerSecond" name="metersSquaredPerSecond" unitType="transmissivity"
    multiplierToSI="1" abbreviation="m²/s" deprecatedInFavorOf="meterSquaredPerSecond"
    udunitsSynonym="meter^2/second">
    <description>meters squared per second, SI unit for kinematic viscosity, specific relative 
      angular momentum and thermal diffusivity. The unit may be better understood when phrased 
      as "meter per second times meter" (velocity of an object with respect to a position).</description>
  </unit>
  <unit id="metersSquaredPerDay" name="metersSquaredPerDay" unitType="transmissivity"
    parentSI="metersSquaredPerSecond" multiplierToSI="0.00001157407" abbreviation="m²/day"
    deprecatedInFavorOf="meterSquaredPerDay" udunitsSynonym="meter^2/day">
    <description>meters squared per day</description>
  </unit>
  <unit id="feetSquaredPerDay" name="feetSquaredPerDay" unitType="transmissivity"
    parentSI="metersSquaredPerSecond" multiplierToSI="0.000001075267" abbreviation="ft²/day"
    deprecatedInFavorOf="footSquaredPerDay" udunitsSynonym="international_foot^2/day">
    <description>feet squared per day</description>
  </unit>

  <unit id="footSquaredPerDay" name="footSquaredPerDay" unitType="transmissivity"
    parentSI="meterSquaredPerSecond" multiplierToSI="0.000001075267" abbreviation="ft²/d"
    udunitsSynonym="international_foot^2/day">
    <description>square feet per day</description>
  </unit>
  <unit id="meterSquaredPerDay" name="meterSquaredPerDay" unitType="transmissivity"
    parentSI="meterSquaredPerSecond" multiplierToSI="0.00001157407" abbreviation="m²/d"
    udunitsSynonym="meter^2/day">
    <description>square meters per day</description>
  </unit>
  <unit id="meterSquaredPerSecond" name="meterSquaredPerSecond" unitType="transmissivity"
    parentSI="meterSquaredPerSecond" multiplierToSI="1" abbreviation="m²/s"
    udunitsSynonym="meter^2/second">
    <description>meters squared per second, SI unit for kinematic viscosity, specific relative 
      angular momentum and thermal diffusivity. The unit may be better understood when phrased 
      as "meter per second times meter" (velocity of an object with respect to a position).</description>
  </unit>

  <!--massFlux-->
  <unit id="kilogramsPerMeterSquaredPerSecond" name="kilogramsPerMeterSquaredPerSecond"
    unitType="massFlux" multiplierToSI="1"
    deprecatedInFavorOf="kilogramPerMeterSquaredPerSecond" udunitsSynonym="kilogram/meter^2/second">
    <description>kilograms per meter sqared per second</description>
  </unit>
  <unit id="gramsPerCentimeterSquaredPerSecond" name="gramsPerCentimeterSquaredPerSecond"
    unitType="massFlux" parentSI="kilogramPerMeterSquaredPerSecond" multiplierToSI="10"
    deprecatedInFavorOf="gramPerCentimeterSquaredPerSecond"
    udunitsSynonym="gram/centimeter^2/second">
    <description>grams Per Centimeter Squared Per Second</description>
  </unit>
  <unit id="gramsPerMeterSquaredPerYear" name="gramsPerMeterSquaredPerYear"
    unitType="massFlux" parentSI="kilogramPerMeterSquaredPerSecond"
    multiplierToSI="0.0000000000317098" deprecatedInFavorOf="gramPerMeterSquaredPerYear"
    udunitsSynonym="gram/meter^2/common_year">
    <description>grams Per Meter Squared Per Year</description>
  </unit>
  <unit id="gramsPerHectarePerDay" name="gramsPerHectarePerDay" unitType="massFlux"
    parentSI="kilogramPerMeterSquaredPerSecond" multiplierToSI="0.0000000000011574"
    deprecatedInFavorOf="gramPerDayPerHectare" udunitsSynonym="gram/hectare/day">
    <description>grams Per Hectare Per Day</description>
  </unit>
  <unit id="kilogramsPerHectarePerYear" name="kilogramsPerHectarePerYear"
    unitType="massFlux" parentSI="kilogramPerMeterSquaredPerSecond"
    multiplierToSI="0.000000000003170979" deprecatedInFavorOf="kilogramPerHectarePerYear"
    udunitsSynonym="kilogram/hectare/common_year">
    <description>kilograms Per Hectare Per Year</description>
  </unit>
  <unit id="kilogramsPerMeterSquaredPerYear" name="kilogramsPerMeterSquaredPerYear"
    unitType="massFlux" parentSI="kilogramPerMeterSquaredPerSecond"
    multiplierToSI="0.00000003170979" deprecatedInFavorOf="kilogramPerMeterSquaredPerYear"
    udunitsSynonym="kilogram/meter^2/common_year">
    <description>kilograms Per Meter Squared Per Year</description>
  </unit>

  <unit id="gramPerCentimeterSquaredPerSecond" name="gramPerCentimeterSquaredPerSecond"
    unitType="massFlux" parentSI="kilogramPerMeterSquaredPerSecond" multiplierToSI="10"
    abbreviation="g/cm²/s" udunitsSynonym="gram/centimeter^2/second">
    <description>grams per square centimeter per second</description>
  </unit>
  <unit id="gramPerDayPerHectare" name="gramPerDayPerHectare" unitType="massFlux"
    parentSI="kilogramPerMeterSquaredPerSecond" multiplierToSI="0.000000000001157407"
    abbreviation="g/d/hectare" udunitsSynonym="gram/day/hectare">
    <description>grams Per Hectare Squared Per Day</description>
  </unit>
  <unit id="gramPerMeterSquaredPerYear" name="gramPerMeterSquaredPerYear"
    unitType="massFlux" parentSI="kilogramPerMeterSquaredPerSecond"
    multiplierToSI="0.00000000003170979" abbreviation="g/m²/yr"
    udunitsSynonym="gram/meter^2/common_year">
    <description>grams per square meter per year</description>
  </unit>
  <unit id="kilogramPerHectarePerYear" name="kilogramPerHectarePerYear"
    unitType="massFlux" parentSI="kilogramPerMeterSquaredPerSecond"
    multiplierToSI="0.000000000003170979" abbreviation="kg/hectare/yr"
    udunitsSynonym="kilogram/hectare/common_year">
    <description>kilograms Per Hectare Per Year</description>
  </unit>
  <unit id="kilogramPerMeterSquaredPerSecond" name="kilogramPerMeterSquaredPerSecond"
    unitType="massFlux" parentSI="kilogramPerMeterSquaredPerSecond" multiplierToSI="1"
    abbreviation="kg/m²/s" udunitsSynonym="kilogram/meter^2/second">
    <description>kilograms per square meter per second</description>
  </unit>
  <unit id="kilogramPerMeterSquaredPerDay" name="kilogramPerMeterSquaredPerDay"
    unitType="massFlux" parentSI="kilogramPerMeterSquaredPerSecond" multiplierToSI="0.000015741"
    abbreviation="kg/m²/d" udunitsSynonym="kilogram/meter^2/day">
    <description>kilograms per square meter per day</description>
  </unit>
  <unit id="gramPerMeterSquaredPerDay" name="gramPerMeterSquaredPerDay"
    unitType="massFlux" parentSI="kilogramPerMeterSquaredPerSecond" multiplierToSI="0.000000015741"
    abbreviation="kg/m²/d" udunitsSynonym="kilogram/meter^2/day">
    <description>grams per square meter per day</description>
  </unit>
  <unit id="milligramPerMeterSquaredPerDay" name="milligramPerMeterSquaredPerDay"
    unitType="massFlux" parentSI="kilogramPerMeterSquaredPerSecond" multiplierToSI="0.000000000015741"
    abbreviation="mg/m²/d" udunitsSynonym="milligram/meter^2/day">
    <description>milligram per square meter per day</description>
  </unit>
  <unit id="kilogramPerMeterSquaredPerYear" name="kilogramPerMeterSquaredPerYear"
    unitType="massFlux" parentSI="kilogramPerMeterSquaredPerSecond"
    multiplierToSI="0.00000003170979" abbreviation="kg/m²/yr"
    udunitsSynonym="kilogram/meter^2/common_year">
    <description>kilograms per square meter per year</description>
  </unit>

  <!--amountOfSubstanceWeight-->
  <unit id="molesPerKilogram" name="molesPerKilogram" unitType="amountOfSubstanceWeight"
    multiplierToSI="1" deprecatedInFavorOf="molePerKilogram" udunitsSynonym="mole/kilogram">
    <description>moles per kilogram</description>
  </unit>
  <unit id="molesPerGram" name="molesPerGram" unitType="amountOfSubstanceWeight"
    parentSI="molePerKilogram" multiplierToSI="1000" deprecatedInFavorOf="molePerGram"
    udunitsSynonym="mole/gram">
    <description>moles per gram</description>
  </unit>
  <unit id="millimolesPerGram" name="millimolesPerGram" unitType="amountOfSubstanceWeight"
    parentSI="molePerKilogram" multiplierToSI="1" deprecatedInFavorOf="millimolePerGram"
    udunitsSynonym="millimole/gram">
    <description>millimoles per gram</description>
  </unit>

  <!--amountOfSubstanceWeightRate-->
  <unit id="molesPerKilogramPerSecond" name="molesPerKilogramPerSecond"
    unitType="amountOfSubstanceWeightRate" multiplierToSI="1"
    deprecatedInFavorOf="molePerKilogramPerSecond" udunitsSynonym="mole/kilogram/second">
    <description>moles per kilogram per second</description>
  </unit>
  <unit id="nanomolesPerGramPerSecond" name="nanomolesPerGramPerSecond"
    parentSI="molePerKilogramPerSecond" multiplierToSI="0.000001"
    unitType="amountOfSubstanceWeightRate" deprecatedInFavorOf="nanomolePerGramPerSecond"
    udunitsSynonym="nanomole/gram/second">
    <description>nanomoles Per Gram Per Second</description>
  </unit>

  <unit id="molePerKilogramPerSecond" name="molePerKilogramPerSecond"
    unitType="amountOfSubstanceWeightRate" parentSI="molePerKilogramPerSecond" multiplierToSI="1"
    abbreviation="mol/kg/s" udunitsSynonym="mole/kilogram/second">
    <description>moles per kilogram per second</description>
  </unit>
  <unit id="nanomolePerGramPerSecond" name="nanomolePerGramPerSecond"
    unitType="amountOfSubstanceWeightRate" parentSI="molePerKilogramPerSecond"
    multiplierToSI="0.000001" abbreviation="nmol/g/s" udunitsSynonym="nanomole/gram/second">
    <description>nanomoles Per Gram Per Second</description>
  </unit>
  <unit id="nanomolePerGramPerHour" name="nanomolePerGramPerHour"
    unitType="amountOfSubstanceWeightRate" parentSI="molePerKilogramPerSecond"
    multiplierToSI="0.000000000277778" abbreviation="nmol/g/h" udunitsSynonym="nanomole/gram/hour">
    <description>nanomoles Per Gram Per Hour</description>
  </unit>
  <unit id="nanomolePerGramPerDay" name="nanomolePerGramPerDay"
    unitType="amountOfSubstanceWeightRate" parentSI="molePerKilogramPerSecond"
    multiplierToSI="0.0000000000115741" abbreviation="nmol/g/d" udunitsSynonym="nanomole/gram/day">
    <description>nanomoles Per Gram Per day</description>
  </unit>


  <unit id="micromolePerGramPerSecond" name="micromolePerGramPerSecond"
    unitType="amountOfSubstanceWeightRate" parentSI="molePerKilogramPerSecond"
    multiplierToSI="0.001" abbreviation="nmol/g/s" udunitsSynonym="micromole/gram/second">
    <description>micromoles Per Gram Per Second</description>
  </unit>
  <unit id="micromolePerGramPerHour" name="micromolePerGramPerHour"
    unitType="amountOfSubstanceWeightRate" parentSI="molePerKilogramPerSecond"
    multiplierToSI="0.000000277778" abbreviation="nmol/g/h" udunitsSynonym="micromole/gram/hour">
    <description>micromoles Per Gram Per Hour</description>
  </unit>
  <unit id="micromolePerGramPerDay" name="micromolePerGramPerDay"
    unitType="amountOfSubstanceWeightRate" parentSI="molePerKilogramPerSecond"
    multiplierToSI="0.0000000115741" abbreviation="nmol/g/d" udunitsSynonym="micromole/gram/day">
    <description>micromoles Per Gram Per day</description>
  </unit>

  <!--mass rates-->
  <unit id="kilogramsPerSecond" name="kilogramsPerSecond" unitType="massRate" multiplierToSI="1"
    abbreviation="kg/s" deprecatedInFavorOf="kilogramPerSecond" udunitsSynonym="kilogram/second">
    <description>kilograms per second</description>
  </unit>
  <unit id="tonnesPerYear" name="tonnesPerYear" unitType="massRate" parentSI="kilogramPerSecond"
    multiplierToSI="0.0000317" deprecatedInFavorOf="tonnePerYear"
    udunitsSynonym="metric_ton/common_year">
    <description>tonnes Per Year</description>
  </unit>
  <unit id="gramsPerYear" name="gramsPerYear" unitType="massRate" parentSI="kilogramPerSecond"
    multiplierToSI="0.0000000000317" abbreviation="g/yr" deprecatedInFavorOf="gramPerYear"
    udunitsSynonym="gram/common_year">
    <description>grams Per Year</description>
  </unit>

  <unit id="gramPerYear" name="gramPerYear" unitType="massRate" parentSI="kilogramPerSecond"
    multiplierToSI="0.00000000003170979" abbreviation="g/yr" udunitsSynonym="gram/common_year">
    <description>grams Per Year</description>
  </unit>
  <unit id="kilogramPerSecond" name="kilogramPerSecond" unitType="massRate"
    parentSI="kilogramPerSecond" multiplierToSI="1" abbreviation="kg/s"
    udunitsSynonym="kilogram/second">
    <description>kilograms per second</description>
  </unit>
  <unit id="tonnePerYear" name="tonnePerYear" unitType="massRate" parentSI="kilogramPerSecond"
    multiplierToSI="0.00003170979" abbreviation="t/yr" udunitsSynonym="metric_ton/common_year">
    <description>tonnes Per Year</description>
  </unit>

  <!--numeric densities-->
  <unit id="numberPerMeterSquared" name="numberPerMeterSquared" unitType="arealDensity"
    multiplierToSI="1" udunitsSynonym="count/meter^2">
    <description>number per meter squared, e.g., for a population density.</description>
  </unit>
  <unit id="numberPerKilometerSquared" name="numberPerKilometerSquared" unitType="arealDensity"
    parentSI="numberPerMeterSquared" multiplierToSI="0.000001" udunitsSynonym="count/kilometer^2">
    <description>number per kilometer squared</description>
  </unit>

  <unit id="numberPerHectare" name="numberPerHectare" unitType="arealDensity"
    parentSI="numberPerMeterSquared" multiplierToSI="0.0001" abbreviation="#/hectare"
    udunitsSynonym="count/hectare">
    <description>number per hectare</description>
  </unit>

  <!--volumetricDensity-->
  <unit id="numberPerMeterCubed" name="numberPerMeterCubed" unitType="volumetricDensity"
    multiplierToSI="1" udunitsSynonym="count/meter^3">
    <description>number per meter cubed</description>
  </unit>

  <unit id="numberPerLiter" name="numberPerLiter" unitType="volumetricDensity"
    parentSI="numberPerMeterCubed" multiplierToSI="1000" udunitsSynonym="count/liter">
    <description>number of entities per liter</description>
  </unit>

  <unit id="numberPerMilliliter" name="numberPerMilliliter" unitType="volumetricDensity"
    parentSI="numberPerMeterCubed" multiplierToSI="1000000" udunitsSynonym="count/milliliter">
    <description>number of entities per milliliter</description>
  </unit>

  <!--massSpecificLength-->
  <unit id="metersPerGram" name="metersPerGram" unitType="massSpecificLength" multiplierToSI="1"
    abbreviation="m/g" deprecatedInFavorOf="meterPerGram" udunitsSynonym="meter/gram">
    <description>meters per gram</description>
  </unit>

  <unit id="meterPerGram" name="meterPerGram" unitType="massSpecificLength" parentSI="meterPerGram"
    multiplierToSI="1" abbreviation="m/g" udunitsSynonym="meter/gram">
    <description>meters per gram</description>
  </unit>

  <!--massSpecificCount-->
  <unit id="numberPerGram" name="numberPerGram" unitType="massSpecificCount" multiplierToSI="1"
    udunitsSynonym="count/gram">
    <description>number of entities per gram</description>
  </unit>

  <!--massPerMass-->
  <unit id="gramsPerGram" name="gramsPerGram" unitType="massPerMass" multiplierToSI="1"
    deprecatedInFavorOf="gramPerGram" udunitsSynonym="gram/gram">
    <description>grams per gram</description>
  </unit>
  <unit id="microgramsPerGram" name="microgramsPerGram" unitType="massPerMass"
    parentSI="gramsPerGram" multiplierToSI="0.000001" deprecatedInFavorOf="microgramPerGram"
    udunitsSynonym="microgram/gram">
    <description>micrograms per gram</description>
  </unit>

  <unit id="gramPerGram" name="gramPerGram" unitType="massPerMass" parentSI="gramPerGram"
    multiplierToSI="1" abbreviation="g/g" udunitsSynonym="gram/gram">
    <description>grams per gram</description>
  </unit>
  <unit id="milligramPerKilogram" name="milligramPerKilogram" unitType="massPerMass"
    parentSI="gramPerGram" multiplierToSI="0.000001" abbreviation="mg/kg"
    udunitsSynonym="milligram/kilogram">
    <description>milligrams per kilogram</description>
  </unit>
  <unit id="microgramPerGram" name="microgramPerGram" unitType="massPerMass" parentSI="gramPerGram"
    multiplierToSI="0.000001" abbreviation="μg/g" udunitsSynonym="microgram/gram">
    <description>micrograms per gram</description>
  </unit>
  <unit id="nanogramPerGram" name="nanogramPerGram" unitType="massPerMass" parentSI="gramPerGram"
    multiplierToSI="0.000000001" abbreviation="ng/g" udunitsSynonym="nanogram/gram">
    <description>micrograms per gram</description>
  </unit>

<!-- mass per mass rate (mass-specific rate) -->
  <unit id="microgramPerGramPerHour" name="microgramPerGramPerHour" unitType="massPerMassRate" parentSI="gramPerGramPerSecond"
    multiplierToSI="0.000000000277778" abbreviation="μg/g/h" udunitsSynonym="microgram/gram/hour">
    <description>micrograms per gram per hour</description>
  </unit>
  <unit id="microgramPerGramPerDay" name="microgramPerGramPerDay" unitType="massPerMassRate" parentSI="gramPerGramPerSecond"
    multiplierToSI="0.0000000000115741" abbreviation="μg/g/day" udunitsSynonym="microgram/gram/day">
    <description>micrograms per gram per day</description>
  </unit>
  <unit id="microgramPerGramPerWeek" name="microgramPerGramPerWeek" unitType="massPerMassRate" parentSI="gramPerGramPerSecond"
    multiplierToSI="0.00000000000165344" abbreviation="μg/g/week" udunitsSynonym="microgram/gram/week">
    <description>micrograms per gram per week</description>
  </unit>
  <unit id="nanogramPerGramPerHour" name="nanogramPerGramPerHour" unitType="massPerMassRate" parentSI="gramPerGramPerSecond"
    multiplierToSI=" 0.000000277778" abbreviation="ng/g" udunitsSynonym="nanogram/gram/hour">
    <description>nanoograms per gram per hour</description>
  </unit>
  



  <!--volumePerVolume-->
  <unit id="cubicCentimetersPerCubicCentimeters" name="cubicCentimetersPerCubicCentimeters"
    unitType="volumePerVolume" multiplierToSI="1" deprecatedInFavorOf="meterCubedPerMeterCubed"
    udunitsSynonym="centimeter^3/centimeter^3">
    <description>cubic centimeters per cubic centimeter</description>
  </unit>

  <unit id="meterCubedPerMeterCubed" name="meterCubedPerMeterCubed" unitType="volumePerVolume"
    parentSI="meterCubedPerMeterCubed" multiplierToSI="1" abbreviation="m³/m³"
    udunitsSynonym="meter^3/meter^3">
    <description>milliliters per liter</description>
  </unit>
  <unit id="literPerLiter" name="literPerLiter" unitType="volumePerVolume"
    parentSI="meterCubedPerMeterCubed" multiplierToSI="1" abbreviation="l/l"
    udunitsSynonym="liter/liter">
    <description>milliliters per liter</description>
  </unit>
  <unit id="milliliterPerLiter" name="milliliterPerLiter" unitType="volumePerVolume"
    parentSI="meterCubedPerMeterCubed" multiplierToSI="0.001" abbreviation="ml/l"
    udunitsSynonym="milliliter/liter">
    <description>milliliters per liter</description>
  </unit>
  <unit id="microliterPerLiter" name="microliterPerLiter" unitType="volumePerVolume"
    parentSI="meterCubedPerMeterCubed" multiplierToSI="0.000001" abbreviation="μl/l"
    udunitsSynonym="microliter/liter">
    <description>milliliters per liter</description>
  </unit>
  <unit id="nanoliterPerLiter" name="nanoliterPerLiter" unitType="volumePerVolume"
    parentSI="meterCubedPerMeterCubed" multiplierToSI="0.000000001" abbreviation="nl/l"
    udunitsSynonym="nanoliter/liter">
    <description>milliliters per liter</description>
  </unit>

  <!--amountPerAmount-->
  <unit id="molePerMole" name="molePerMole" unitType="" parentSI="molePerMole" multiplierToSI="1"
    abbreviation="mol/mol" udunitsSynonym="mole/mole">
    <description>millimoles per mole</description>
  </unit>
  <unit id="millimolePerMole" name="millimolePerMole" unitType="" parentSI="molePerMole"
    multiplierToSI=".001" abbreviation="mmol/mol" udunitsSynonym="millimole/mole">
    <description>millimoles per mole</description>
  </unit>
  <unit id="micromolePerMole" name="micromolePerMole" unitType="" parentSI="molePerMole"
    multiplierToSI=".000001" abbreviation="μmol/mol" udunitsSynonym="micromole/mole">
    <description>millimoles per mole</description>
  </unit>
  <unit id="nanomolePerMole" name="nanomolePerMole" unitType="" parentSI="molePerMole"
    multiplierToSI=".000000001" abbreviation="nmol/mol" udunitsSynonym="nanomole/mole">
    <description>millimoles per mole</description>
  </unit>

  <!--amountPerMass-->
  <unit id="molePerKilogram" name="molePerKilogram" unitType="" parentSI="molePerKilogram"
    multiplierToSI="1" abbreviation="mol/kg" udunitsSynonym="mole/kilogram">
    <description>micromoles per kilogram</description>
  </unit>
  <unit id="millimolePerKilogram" name="millimolePerKilogram" unitType="" parentSI="molePerKilogram"
    multiplierToSI="0.001" abbreviation="mmol/kg" udunitsSynonym="millimole/kilogram">
    <description>micromoles per kilogram</description>
  </unit>
  <unit id="micromolePerKilogram" name="micromolePerKilogram" unitType="" parentSI="molePerKilogram"
    multiplierToSI="0.000001" abbreviation="µmol/kg" udunitsSynonym="micromole/kilogram">
    <description>micromoles per kilogram</description>
  </unit>
  <unit id="nanomolePerKilogram" name="nanomolePerKilogram" unitType="" parentSI="molePerKilogram"
    multiplierToSI="0.000000001" abbreviation="nmol/kg" udunitsSynonym="nanomole/kilogram">
    <description>micromoles per kilogram</description>
  </unit>

  <!--dimensionless-->
  <unit id="percent" name="percent" unitType="dimensionless" parentSI="dimensionless"
    multiplierToSI="1" abbreviation="%" udunitsSynonym="percent">
    <description>percent, one part per hundred parts. a decimal ratio multipled by 100</description>
  </unit>
  <unit id="permil" name="permil" unitType="dimensionless" parentSI="dimensionless"
    multiplierToSI="1" abbreviation="o/oo" udunitsSynonym="percent">
    <description>permil, one part per thousand parts. a decimal ratio multipled by 1000</description>
  </unit>
<!-- irradiance (a flux) -->

  <unit id="wattPerMeterSquared" name="wattPerMeterSquared" unitType=""
    parentSI="wattPerMeterSquared" multiplierToSI="1" abbreviation="W/m²"
    udunitsSynonym="watt/meter^2">
    <description>watts per square meter, also, 1 kilogram per second cubed (ie, a flux)</description>
  </unit>
  <unit id="kilowattPerMeterSquared" name="kilowattPerMeterSquared" unitType=""
    parentSI="wattPerMeterSquared" multiplierToSI="1000" abbreviation="kW/m²"
    udunitsSynonym="kilowatt/meter^2">
    <description>kilowatts per square meter</description>
  </unit>
  <unit id="wattPerMeterSquaredPerSteradian" name="wattPerMeterSquaredPerSteradian" unitType=""
    parentSI="wattPerMeterSquaredPerSteradian" multiplierToSI="1" abbreviation="W/m²/sr"
    udunitsSynonym="watt/meter^2/steradian">
    <description>watts per square meter, in a solid angle</description>
  </unit>
  <unit id="microwattPerCentimeterSquaredPerSteradian" name="microwattPerCentimeterSquaredPerSteradian" unitType=""
    parentSI="wattPerMeterSquaredPerSteradian" multiplierToSI="0.0000001" abbreviation="µW/cm²/sr"
    udunitsSynonym="microwatt/centimeter^2/steradian">
    <description>watts per square centimeter, in a solid angle</description>
  </unit>
  
  <!-- spectral irradiances (a flux) -->
  
  <unit id="wattPerMeterSquaredPerNanometer" name="wattPerMeterSquaredPerNanometer" unitType=""
    parentSI="wattPerMeterSquaredPerMeter" multiplierToSI="0.000000001" abbreviation="W/m²/nm"
    udunitsSynonym="watt/meter^2/nm">
    <description>watts per square meter, per unit of wavelength</description>
  </unit>
  
  <unit id="microwattPerCentimeterSquaredPerNanometer" name="microwattPerCentimeterSquaredPerNanometer" unitType=""
    parentSI="wattPerMeterSquaredPerMeter" multiplierToSI="0.0000001" abbreviation="µW/cm²/nm"
    udunitsSynonym="microwatt/centimeter^2/nm">
    <description>watts per square centimeter, per unit of wavelength</description>
  </unit>

  <unit id="wattPerMeterSquaredPerNanometerPerSteradian" name="wattPerMeterSquaredPerNanometerPerSteradian" unitType=""
    parentSI="wattPerMeterSquaredPerMeterPerSteradian" multiplierToSI="0.000000001" abbreviation="W/m²/nm/sr"
    udunitsSynonym="watt/meter^2/nm/steradian">
    <description>watts per square meter, per unit of wavelength in a solid angle</description>
  </unit>

  <unit id="microwattPerCentimeterSquaredPerNanometerPerSteradian" name="microwattPerCentimeterSquaredPerNanometerPerSteradian" unitType=""
    parentSI="wattPerMeterSquaredPerMeterPerSteradian" multiplierToSI="0.0000001" abbreviation="µW/cm²/nm/sr"
    udunitsSynonym="microwatt/centimeter^2/nm/steradian">
    <description>microwatts per square centimeter, per unit of wavelength, in a solid angle</description>
  </unit>

<!-- molar flux --> 
  <unit id="molePerMeterSquaredPerSecond" name="molePerMeterSquaredPerSecond" unitType=""
    parentSI="molePerMeterSquaredPerSecond" multiplierToSI="1" abbreviation="mol/m²/s"
    udunitsSynonym="mole/meter^2/second">
    <description>micromoles per square meter per second</description>
  </unit>
  <unit id="micromolePerMeterSquaredPerSecond" name="micromolePerMeterSquaredPerSecond" unitType=""
    parentSI="molePerMeterSquaredPerSecond" multiplierToSI="0.000001" abbreviation="µmol/m²/s"
    udunitsSynonym="micromole/meter^2/second">
    <description>micromoles per square meter per second</description>
  </unit>
  <unit id="micromolePerCentimeterSquaredPerSecond" name="micromolePerCentimeterSquaredPerSecond" unitType=""
    parentSI="molePerMeterSquaredPerSecond" multiplierToSI="0.01" abbreviation="µmol/cm²/s"
    udunitsSynonym="micromole/centimeter^2/second">
    <description>micromoles per square centimeter per second</description>
  </unit>

<!-- energy flux -->
  <unit id="megajoulePerMeterSquaredPerDay" name="megajoulePerMeterSquaredPerDay" abbreviation="MJ/m2/day" 
    unitType="arealEnergyDensityRate" parentSI="joulePerMeterSquaredPerSecond" multiplierToSI="11.5741" constantToSI="0"
    udunitsSynonym="megajoule/m^2/day">
    <description>megajoules per square meter per day</description>
  </unit>
  <unit id="langleyPerDay" name="langleyPerDay" abbreviation="Ly/day" 
    unitType="arealEnergyDensityRate" parentSI="joulePerMeterSquaredPerSecond" multiplierToSI="0.484259" constantToSI="0"
    udunitsSynonym="langley/day">
    <description>Langley (Ly) per day. Ly is a unit of energy density = 41840 joule/m^2, = 1 calorie/cm^2</description>
  </unit>
</stmml:unitList>
