source: tags/3.0.3/data/units.xml @ 5980

<?xml version="1.0" encoding="UTF-8"?>
<!-- 
  $Id: units.xml 4669 2008-11-26 11:05:59Z nicklas $

  Copyright (C) 2008 Nicklas Nordborg

  This file is part of BASE - BioArray Software Environment.
  Available at http://base.thep.lu.se/

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-->
<quantities
  xmlns="http://base.thep.lu.se/units.xsd"
  >
  <quantity system-id="net.sf.basedb.core.Quantity.LENGTH">
    <name>Distance</name>
    <reference-unit>1 meter</reference-unit>
    <description>
      Distance is defined by distance light travels in vacuum during 
      1/299 792 458 of a second. See http://physics.nist.gov/cuu/Units/meter.html
      and http://en.wikipedia.org/wiki/Meter
    </description>
    <unit>
      <name>Kilometer</name>
      <symbol>km</symbol>
      <factor>1000</factor>
      <description>1 kilometer is 1000 meters.</description>
    </unit>
    <unit>
      <name>Meter</name>
      <symbol>m</symbol>
      <factor>1</factor>
      <description>1 meter is the standard unit of distance.</description>
    </unit>
    <unit>
      <name>Centimeter</name>
      <symbol>cm</symbol>
      <factor>0.01</factor>
      <description>1 centimeter is 1/100 of a meter.</description>
    </unit>
    <unit>
      <name>Millimeter</name>
      <symbol>mm</symbol>
      <factor>0.001</factor>
      <description>1 millimeter is 1/1 000 of a meter.</description>
    </unit>
    <unit>
      <name>Micrometer</name>
      <symbol>µm</symbol>
      <alias>um</alias>
      <factor>1E-6</factor>
      <description>1 micrometer is 1/1 000 of a millimeter.</description>
    </unit>
    <unit>
      <name>Nanometer</name>
      <symbol>nm</symbol>
      <factor>1E-9</factor>
      <description>1 nanometer is 1/1 000 of a micrometer.</description>
    </unit>
  </quantity>
  <quantity system-id="net.sf.basedb.core.Quantity.MASS">
    <name>Mass</name>
    <reference-unit>1 kilogram</reference-unit>
    <description>
      Mass is defined by the kilogram prototype. 
      See http://physics.nist.gov/cuu/Units/kilogram.html and
      http://en.wikipedia.org/wiki/Mass
    </description>
    <unit>
      <name>Kilogram</name>
      <symbol>kg</symbol>
      <factor>1</factor>
      <description>1 kilogram is the reference unit of mass.</description>
    </unit>
    <unit>
      <name>Gram</name>
      <symbol>g</symbol>
      <factor>1E-3</factor>
      <description>1 gram is 1/1 000 of a kilogram.</description>
    </unit>
    <unit>
      <name>Milligram</name>
      <symbol>mg</symbol>
      <factor>1E-6</factor>
      <description>1 milligram is 1/1 000 of a gram.</description>
    </unit>
    <unit>
      <name>Microgram</name>
      <symbol>µg</symbol>
      <alias>ug</alias>
      <factor>1E-9</factor>
      <description>1 mikrogram is 1/1 000 of a milligram.</description>
    </unit>
  </quantity> 
  <quantity system-id="net.sf.basedb.core.Quantity.TIME">
    <name>Time</name>
    <reference-unit>1 second</reference-unit>
    <description>
      Time is defined by the duration of 9 192 631 770 periods of the 
      radiation corresponding to the transition between the two hyperfine 
      levels of the ground state of the cesium 133 atom. 
      See http://physics.nist.gov/cuu/Units/second.html and
      http://en.wikipedia.org/wiki/Second
    </description>
    <unit>
      <name>Year</name>
      <symbol>y</symbol>
      <alias>year</alias>
      <alias>years</alias>
      <factor>31557600</factor>
      <description>1 year is 365.25 days in average or 31 557 600 seconds.</description>
    </unit>
    <unit>
      <name>Month</name>
      <symbol>mo</symbol>
      <alias>month</alias>
      <alias>months</alias>
      <factor>2629800</factor>
      <description>1 month is 30.4375 days in average or 2 629 800 seconds.</description>
    </unit>
    <unit>
      <name>Week</name>
      <symbol>w</symbol>
      <alias>week</alias>
      <alias>weeks</alias>
      <factor>604800</factor>
      <description>1 week is 7 days or 604 800 seconds.</description>
    </unit>
    <unit>
      <name>Day</name>
      <symbol>d</symbol>
      <alias>day</alias>
      <alias>days</alias>
      <factor>86400</factor>
      <description>1 day is 24 hours or 86 400 seconds.</description>
    </unit>
    <unit>
      <name>Hour</name>
      <symbol>h</symbol>
      <alias>hour</alias>
      <alias>hours</alias>
      <factor>3600</factor>
      <description>1 hour is 60 minutes or 3600 seconds.</description>
    </unit>
    <unit>
      <name>Minute</name>
      <symbol>min</symbol>
      <alias>minute</alias>
      <alias>minutes</alias>
      <factor>60</factor>
      <description>1 minute is 60 seconds.</description>
    </unit>
    <unit>
      <name>Second</name>
      <symbol>s</symbol>
      <alias>sec</alias>
      <factor>1</factor>
      <description>1 second is the reference unit of time.</description>
    </unit>
    <unit>
      <name>Millisecond</name>
      <symbol>ms</symbol>
      <factor>1E-3</factor>
      <description>1 millisecond is 1/1 000 of a second.</description>
    </unit>
    <unit>
      <name>Microsecond</name>
      <symbol>µs</symbol>
      <alias>ug</alias>
      <factor>1E-6</factor>
      <description>1 microsecond is 1/1 000 of a millisecond.</description>
    </unit>
    <unit>
      <name>Nanosecond</name>
      <symbol>ns</symbol>
      <factor>1E-9</factor>
      <description>1 nanosecond is 1/1 000 of a microsecond.</description>
    </unit>
  </quantity>
  <quantity system-id="net.sf.basedb.core.Quantity.TEMPERATURE">
    <name>Temperature</name>
    <reference-unit>1 kelvin</reference-unit>
    <description>
      Temperature is defined as 1/273.16 of the triple point of water. 
      See http://physics.nist.gov/cuu/Units/kelvin.html and
      http://en.wikipedia.org/wiki/Kelvin
    </description>
    <unit>
      <name>Kelvin</name>
      <symbol>K</symbol>
      <factor>1</factor>
      <description>Kelvin is the reference unit of temperature.</description>
    </unit>
    <unit>
      <name>Celsius</name>
      <symbol>°C</symbol>
      <alias>C</alias>
      <factor>1</factor>
      <offset>273.15</offset>
      <description>
        The Celcius scale has 0 = freezing point of water 
        and 100 = boiling point of water and is related to Kelvin by an 
        offset of 273.15.
      </description>
    </unit>
    <unit>
      <name>Fahrenheit</name>
      <symbol>°F</symbol>
      <alias>F</alias>
      <factor>0.55555555555555555555555555555556</factor>
      <offset>241.15</offset>
      <description>
        In the Fahrenheit scale the water freezes as 32 degrees 
        and boils at 212.
      </description>
    </unit>
  </quantity>
  <quantity system-id="net.sf.basedb.core.Quantity.CURRENT">
    <name>Electric current</name>
    <reference-unit>1 ampere</reference-unit>
    <description>
      The ampere is that constant current which, if maintained in two straight parallel 
      conductors of infinite length, of negligible circular cross section, and placed 1 
      meter apart in vacuum, would produce between these conductors a force equal to 2 × 10-7 
      newton per meter of length. See http://physics.nist.gov/cuu/Units/ampere.html and
      http://en.wikipedia.org/wiki/Ampere
    </description>
    <unit>
      <name>Ampere</name>
      <symbol>A</symbol>
      <factor>1</factor>
      <description>1 ampere is the reference unit of electric current.</description>
    </unit>
    <unit>
      <name>Milliampere</name>
      <symbol>mA</symbol>
      <factor>1E-3</factor>
      <description>1 milliampere is 1/1 000 of an ampere.</description>
    </unit>
    <unit>
      <name>Microampere</name>
      <symbol>µA</symbol>
      <alias>uA</alias>
      <factor>1E-6</factor>
      <description>1 microampere is 1/1 000 of a milliampere.</description>
    </unit>
    <unit>
      <name>Nanoampere</name>
      <symbol>nA</symbol>
      <factor>1E-9</factor>
      <description>1 nanoampere is 1/1 000 of a microampere.</description>
    </unit>
  </quantity>
  <quantity system-id="net.sf.basedb.core.Quantity.SUBSTANCE">
    <name>Amount of substance</name>
    <reference-unit>1 mol</reference-unit>
    <description>
      The mole is the amount of substance of a system which contains as many elementary 
      entities as there are atoms in 0.012 kilogram of carbon 12. See
      http://physics.nist.gov/cuu/Units/mole.html and
      http://en.wikipedia.org/wiki/Mole_(unit)
    </description>
    <unit>
      <name>Kilomole</name>
      <symbol>kmol</symbol>
      <factor>1000</factor>
      <description>1 kilomole is 1000 moles.</description>
    </unit>
    <unit>
      <name>Mole</name>
      <symbol>mol</symbol>
      <factor>1</factor>
      <description>1 mole is the reference unit of amount of substance.</description>
    </unit>
    <unit>
      <name>Millimole</name>
      <symbol>mmol</symbol>
      <factor>1E-3</factor>
      <description>1 millimole is 1/1 000 of a mole.</description>
    </unit>
    <unit>
      <name>Micromole</name>
      <symbol>µmol</symbol>
      <factor>1E-6</factor>
      <description>1 micromole is 1/1 000 of a millimole.</description>
    </unit>
    <unit>
      <name>Nanomole</name>
      <symbol>nmol</symbol>
      <factor>1E-9</factor>
      <description>1 nanomole is 1/1 000 of a micromole.</description>
    </unit>
  </quantity>
  <quantity system-id="net.sf.basedb.core.Quantity.AREA">
    <name>Area</name>
    <reference-unit>1 m²</reference-unit>
    <description>
      1 square meter is defined as the area of a square whose sides measure exactly one metre.
      See http://en.wikipedia.org/wiki/Area
    </description>
    <unit>
      <name>Square kilometer</name>
      <symbol>km²</symbol>
      <alias>km2</alias>
      <factor>1E6</factor>
      <description>1 square kilometer is 1 000 000 square meters.</description>
    </unit>
    <unit>
      <name>Square meter</name>
      <symbol>m²</symbol>
      <alias>m2</alias>
      <factor>1</factor>
      <description>1 square meter is the reference unit of area.</description>
    </unit>
    <unit>
      <name>Square centimeter</name>
      <symbol>cm²</symbol>
      <alias>cm2</alias>
      <factor>1E-4</factor>
      <description>1 square centimeter is 1/10 000 of a square meter.</description>
    </unit>
    <unit>
      <name>Square millimeter</name>
      <symbol>mm²</symbol>
      <alias>mm2</alias>
      <factor>1E-6</factor>
      <description>1 square millimeter is 1/1 000 000 of a square meter.</description>
    </unit>
    <unit>
      <name>Square micrometer</name>
      <symbol>µm²</symbol>
      <alias>um2</alias>
      <factor>1E-12</factor>
      <description>1 square microimeter is 1/1 000 000 of a square millimeter.</description>
    </unit>
  </quantity>
  <quantity system-id="net.sf.basedb.core.Quantity.VOLUME">
    <name>Volume</name>
    <reference-unit>1 m³</reference-unit>
    <description>
      1 cubic meter is the volume a cube whose sides measure exactly 1 meter.
      See http://en.wikipedia.org/wiki/Volume
    </description>
    <unit>
      <name>Cubic meter</name>
      <symbol>m³</symbol>
      <alias>m3</alias>
      <factor>1</factor>
      <description>1 cubic meter is the reference unit of volume.</description>
    </unit>
    <unit>
      <name>Liter</name>
      <symbol>l</symbol>
      <factor>1E-3</factor>
      <description>1 liter is the 1/1 000 of a cubic meter.</description>
    </unit>
    <unit>
      <name>Milliliter</name>
      <symbol>ml</symbol>
      <alias>cm³</alias>
      <alias>cm3</alias>
      <factor>1E-6</factor>
      <description>
        1 milliliter is 1/1 000 of a liter. A milliliter is equal
        to 1 cm³.
      </description>
    </unit>
    <unit>
      <name>Microliter</name>
      <symbol>µl</symbol>
      <alias>mm³</alias>
      <alias>mm3</alias>
      <factor>1E-9</factor>
      <description>
        1 microliter is 1/1 000 of a milliliter. A microliter is
        equal to 1 mm³.
      </description>
    </unit>
    <unit>
      <name>Nanoliter</name>
      <symbol>nl</symbol>
      <factor>1E-12</factor>
      <description>1 nanoliter is 1/1 000 of a microliter.</description>
    </unit>
    <unit>
      <name>Picoliter</name>
      <symbol>pl</symbol>
      <factor>1E-15</factor>
      <description>1 picoliter is 1/1 000 of a nanoliter.</description>
    </unit>
  </quantity>
  <quantity system-id="net.sf.basedb.core.Quantity.VELOCITY">
    <name>Velocity</name>
    <reference-unit>1 m/s</reference-unit>
    <description>
      The volocity is the distance traveled during a specified unit of time.
      See http://en.wikipedia.org/wiki/Speed
    </description>
    <unit>
      <name>Meter per second</name>
      <symbol>m/s</symbol>
      <factor>1</factor>
      <description>1 m/s is the reference unit of velocity.</description>
    </unit>
    <unit>
      <name>Kilometers per hour</name>
      <symbol>km/h</symbol>
      <alias>km/hour</alias>
      <factor>3.6</factor>
      <description>1 m/s is the same as 3.6 km/hour.</description>
    </unit>
  </quantity>
  <quantity system-id="net.sf.basedb.core.Quantity.ANGLE">
    <name>Angle</name>
    <reference-unit>1 radian</reference-unit>
    <description>
      One radian is the angle subtended at the center of a circle by an arc that 
      is equal in length to the radius of the circle. See
      http://en.wikipedia.org/wiki/Radian
    </description>
    <unit>
      <name>Radian</name>
      <symbol>rad</symbol>
      <factor>1</factor>
      <description>1 radian is the reference unit of angle.</description>
    </unit>
    <unit>
      <name>Degree</name>
      <symbol>°</symbol>
      <alias>deg</alias>
      <factor>0.017453292519943295</factor>
      <description>1 degree is π/180 radians (≈0.0175).</description>
    </unit>
    <unit>
      <name>Minute (angle)</name>
      <symbol>'</symbol>
      <factor>2.908882086657216E-4</factor>
      <description>1' = 1/60°</description>
    </unit>
    <unit>
      <name>Second (angle)</name>
      <symbol>"</symbol>
      <factor>4.84813681109536E-6</factor>
      <description>1" = 1/60' = 1/3 600°</description>
    </unit>
  </quantity>
  <quantity system-id="net.sf.based.core.Quantity.FORCE">
    <name>Force</name>
    <reference-unit>1 newton</reference-unit>
    <description>
      A force is what causes a mass to accelerate. 1 newton is the force required
      to give a mass of one kilogram an acceleration of one meter per second
      squared. See http://en.wikipedia.org/wiki/Newton
    </description>
    <unit>
      <name>Kilonewton</name>
      <symbol>kN</symbol>
      <factor>1000</factor>
      <description>1 kilonewton is 1 000 N.</description>
    </unit>
    <unit>
      <name>Newton</name>
      <symbol>N</symbol>
      <factor>1</factor>
      <description>1 newton is the reference unit of force.</description>
    </unit>
    <unit>
      <name>Millinewton</name>
      <symbol>mN</symbol>
      <factor>1E-3</factor>
      <description>1 millinewton is 1/1 000 N.</description>
    </unit>
    <unit>
      <name>Micronewton</name>
      <symbol>µN</symbol>
      <factor>1E-6</factor>
      <description>1 micronewton is 1/1 000 mN.</description>
    </unit>
  </quantity>
  <quantity system-id="net.sf.basedb.core.Quantity.FREQUENCY">
    <name>Frequency</name>
    <reference-unit>1 hertz</reference-unit>
    <description>
      The definition of hertz follows directly from the definition of
      a second such that the hyperfine splitting in the ground state of the 
      caesium 133 atom is exactly 9 192 631 770 hertz.
      See http://en.wikipedia.org/wiki/Hertz
    </description>
    <unit>
      <name>Hertz</name>
      <symbol>Hz</symbol>
      <factor>1</factor>
      <description>1 hertz is the reference unit of frequency.</description>
    </unit>
    <unit>
      <name>Kilohertz</name>
      <symbol>kHz</symbol>
      <factor>1000</factor>
      <description>1 kilohertz is 1 000 hertz.</description>
    </unit>
    <unit>
      <name>Megahertz</name>
      <symbol>MHz</symbol>
      <factor>1E6</factor>
      <description>1 megahertz is 1 000 000 hertz.</description>
    </unit>
    <unit>
      <name>Gigahertz</name>
      <symbol>GHz</symbol>
      <factor>1E9</factor>
      <description>1 gigahertz is 1 000 000 000 hertz.</description>
    </unit>
    <unit>
      <name>Terahertz</name>
      <symbol>THz</symbol>
      <factor>1E12</factor>
      <description>1 terahertz is 1 000 gigahertz.</description>
    </unit>
  </quantity>

  <quantity system-id="net.sf.basedb.core.Quantity.DENSITY">
    <name>Density</name>
    <reference-unit>1 kg/m³</reference-unit>
    <description>
      The density of a material is the mass per unit volumne. See
      http://en.wikipedia.org/wiki/Density
    </description>
    <unit>
      <name>Grams per cubic centimeter</name>
      <symbol>g/cm³</symbol>
      <alias>g/cm3</alias>
      <alias>g/mL</alias>
      <factor>1000</factor>
      <description>
        1 g/cm³ is the is the same as 1 g/mL and is 1 000 kilograms per
        cubic metre.
      </description>
    </unit>
    <unit>
      <name>Kilograms per cubic meter</name>
      <symbol>kg/m³</symbol>
      <alias>kg/m3</alias>
      <alias>g/L</alias>
      <factor>1</factor>
      <description>
        1 kg/m³ is the reference unit of density.
      </description>
    </unit>
  </quantity>
  <quantity system-id="net.sf.basedb.core.Quantity.ENERGY">
    <name>Energy</name>
    <reference-unit>1 joule</reference-unit>
    <description>
      One joule is the work done, or energy expended, by a force of one newton moving one 
      meter along the direction of the force. See http://en.wikipedia.org/wiki/Joule
    </description>
    <unit>
      <name>Kilowatt hour</name>
      <symbol>kWh</symbol>
      <factor>3.6E6</factor>
      <description>1 kilowatt hour is 3 600 000 joules.</description>
    </unit>
    <unit>
      <name>Megajoule</name>
      <symbol>MJ</symbol>
      <factor>1E6</factor>
      <description>1 megajoule is 1 000 000 joules.</description>
    </unit>
    <unit>
      <name>Kilojoule</name>
      <symbol>kJ</symbol>
      <factor>1E3</factor>
      <description>1 kilojoule is 1 000 joules.</description>
    </unit>
    <unit>
      <name>Joule</name>
      <symbol>J</symbol>
      <alias>Ws</alias>
      <factor>1</factor>
      <description>
        1 joule is the reference unit of energy. A joule is also
        equal to one watt-second (Ws)
      </description>
    </unit>
    <unit>
      <name>Millijoule</name>
      <symbol>mJ</symbol>
      <factor>1E-3</factor>
      <description>1 millijoule is 1/1 000 of a joule.</description>
    </unit>
    <unit>
      <name>Mikrojoule</name>
      <symbol>µJ</symbol>
      <factor>1E-6</factor>
      <description>1 microjoule is 1/1 000 of a millijoule.</description>
    </unit>
    <unit>
      <name>Megaelectronvolt</name>
      <symbol>MeV</symbol>
      <factor>1.60217653E-12</factor>
      <description>
        1 kiloelectronvolt is 1 000 000 electronvolts.
      </description>
    </unit>
    <unit>
      <name>Kiloelectronvolt</name>
      <symbol>keV</symbol>
      <factor>1.60217653E-15</factor>
      <description>
        1 kiloelectronvolt is 1 000 electronvolts.
      </description>
    </unit>
    <unit>
      <name>Electronvolt</name>
      <symbol>eV</symbol>
      <factor>1.60217653E-19</factor>
      <description>
        1 electronvolt is the amount of kinetic energy gained by a single unbound electron 
        when it passes through an electrostatic potential difference of one volt, in vacuum.
        1 eV ≈ 1.602 176 53E−19 J.
      </description>
    </unit>
  </quantity>
  <quantity system-id="net.sf.basedb.core.Quantity.POWER">
    <name>Power</name>
    <reference-unit>1 watt</reference-unit>
    <description>
      Power measures the rate of energy conversion. The reference unit
      is 1 watt which is equal to 1 joule of energy per second.
      See http://en.wikipedia.org/wiki/Watt
    </description>
    <unit>
      <name>Megawatt</name>
      <symbol>MW</symbol>
      <alias>MJ/s</alias>
      <factor>1E6</factor>
      <description>1 megawatt is 1 000 000 watts.</description>
    </unit>
    <unit>
      <name>Kilowatt</name>
      <symbol>kW</symbol>
      <alias>kJ/s</alias>
      <factor>1000</factor>
      <description>1 kilowatt is 1 000 watts.</description>
    </unit>
    <unit>
      <name>Watt</name>
      <symbol>W</symbol>
      <alias>J/s</alias>
      <factor>1.0</factor>
      <description>1 watt is the reference unit of power.</description>
    </unit>
    <unit>
      <name>Milliwatt</name>
      <symbol>mW</symbol>
      <alias>mJ/s</alias>
      <factor>1E-3</factor>
      <description>1 milliwatt is 1/1 000 watt.</description>
    </unit>
    <unit>
      <name>Microwatt</name>
      <symbol>µW</symbol>
      <alias>uW</alias>
      <alias>µJ/s</alias>
      <factor>1E-3</factor>
      <description>1 microwatt is 1/1 000 milliwatt.</description>
    </unit>
  </quantity>
  <quantity system-id="net.sf.basedb.core.Quantity.PRESSURE">
    <name>Pressure</name>
    <reference-unit>1 pascal</reference-unit>
    <description>
      Pressure is a measure of perpendicular force per unit area i.e. equivalent 
      to one newton per square meter. See http://en.wikipedia.org/wiki/Pascal_(unit)
    </description>
    <unit>
      <name>Megapascal</name>
      <symbol>MPa</symbol>
      <alias>MN/m²</alias>
      <alias>MN/m2</alias>
      <factor>1E6</factor>
      <description>1 megapascal is 1 000 000 Pa.</description>
    </unit>
    <unit>
      <name>Kilopascal</name>
      <symbol>kPa</symbol>
      <alias>kN/m²</alias>
      <alias>kN/m2</alias>
      <factor>1000</factor>
      <description>1 kilopascal is 1 000 Pa.</description>
    </unit>
    <unit>
      <name>Pascal</name>
      <symbol>Pa</symbol>
      <alias>N/m²</alias>
      <alias>N/m2</alias>
      <factor>1.0</factor>
      <description>1 pascal is the reference unit of pressure.</description>
    </unit>
    <unit>
      <name>Millipascal</name>
      <symbol>mPa</symbol>
      <alias>mN/m²</alias>
      <alias>mN/m2</alias>
      <factor>1E-3</factor>
      <description>1 millipascal is 1/1 000 of a pascal.</description>
    </unit>
    <unit>
      <name>Micropascal</name>
      <symbol>µPa</symbol>
      <alias>uPa</alias>
      <alias>µN/m²</alias>
      <alias>uN/m2</alias>
      <factor>1E-6</factor>
      <description>1 micropascal is 1/1 000 of a millipascal.</description>
    </unit>
  </quantity>
  <quantity system-id="net.sf.basedb.core.Quantity.POTENTIAL">
    <name>Electric potential</name>
    <reference-unit>1 volt</reference-unit>
    <description>
      The volt is defined as the potential difference across a conductor 
      when a current of one ampere dissipates one watt of power. See
      http://en.wikipedia.org/wiki/Volt
    </description>
    <unit>
      <name>Kilovolt</name>
      <symbol>kV</symbol>
      <factor>1000</factor>
      <description>1 kilovolt is 1 000 volts.</description>
    </unit>
    <unit>
      <name>Volt</name>
      <symbol>V</symbol>
      <factor>1</factor>
      <description>1 volt is the reference unit of electrical potential.</description>
    </unit>
    <unit>
      <name>Millivolt</name>
      <symbol>mV</symbol>
      <factor>1E-3</factor>
      <description>1 millivolt is 1/1 000 of a volt.</description>
    </unit>
    <unit>
      <name>Microvolt</name>
      <symbol>µV</symbol>
      <alias>uV</alias>
      <factor>1E-6</factor>
      <description>1 microvolt is 1/1 000 of a millivolt.</description>
    </unit>
  </quantity>
  <quantity system-id="net.sf.basedb.core.Quantity.RESISTANCE">
    <name>Electric resistance</name>
    <reference-unit>1 ohm</reference-unit>
    <description>
      The ohm is the electric resistance between two points of a conductor when 
      a constant potential difference of 1 volt, applied to these points, produces 
      in the conductor a current of 1 ampere.
      See http://en.wikipedia.org/wiki/Ohm
    </description>
    <unit>
      <name>Megaohm</name>
      <symbol>MΩ</symbol>
      <alias>MO</alias>
      <factor>1E6</factor>
      <description>1 megaohm is 1 000 000 ohms.</description>
    </unit>
    <unit>
      <name>Kiloohm</name>
      <symbol>kΩ</symbol>
      <alias>kO</alias>
      <factor>1000</factor>
      <description>1 kiloohm is 1 000 ohms.</description>
    </unit>
    <unit>
      <name>Ohm</name>
      <symbol>Ω</symbol>
      <alias>O</alias>
      <factor>1</factor>
      <description>1 ohm is the reference unit of electrical resistance.</description>
    </unit>
    <unit>
      <name>Milliohm</name>
      <symbol>mΩ</symbol>
      <alias>mO</alias>
      <factor>1E-3</factor>
      <description>1 milliohm is 1/1 000 ohm.</description>
    </unit>
  </quantity>
  <quantity system-id="net.sf.basedb.core.Quantity.CHARGE">
    <name>Electrical charge</name>
    <reference-unit>1 coulomb</reference-unit>
    <description>
      1 coulomb is the amount of electric charge transported by a current of 1 ampere in 1 second.
      See http://en.wikipedia.org/wiki/Coulomb
    </description>
    <unit>
      <name>Ampere-hour</name>
      <symbol>Ah</symbol>
      <factor>3600</factor>
      <description>1 ampere-hour is 3 600 coulombs.</description>
    </unit>
    <unit>
      <name>Kilocoulomb</name>
      <symbol>kC</symbol>
      <alias>kAs</alias>
      <factor>1000</factor>
      <description>1 kilocoulomb is 1 000 coulombs.</description>
    </unit>
    <unit>
      <name>Coulomb</name>
      <symbol>C</symbol>
      <alias>As</alias>
      <factor>1</factor>
      <description>1 coulomb is the reference unit of charge.</description>
    </unit>
    <unit>
      <name>Millicoulomb</name>
      <symbol>mC</symbol>
      <alias>mAs</alias>
      <factor>1E-3</factor>
      <description>1 millicoulomb is 1/1 000 of a coulomb.</description>
    </unit>
    <unit>
      <name>Microoulomb</name>
      <symbol>µC</symbol>
      <alias>uC</alias>
      <alias>µAs</alias>
      <alias>uAs</alias>
      <factor>1E-6</factor>
      <description>1 microcoulomb is 1/1 000 of a millicoulomb.</description>
    </unit>
    <unit>
      <name>Nanooulomb</name>
      <symbol>nC</symbol>
      <alias>nAs</alias>
      <factor>1E-9</factor>
      <description>1 nanocoulomb is 1/1 000 of a microcoulomb.</description>
    </unit>
  </quantity>
  <quantity system-id="net.sf.basedb.core.Quantity.CAPACITANCE">
    <name>Capacitance</name>
    <reference-unit>1 farad</reference-unit>
    <description>
      One farad is the capacitance for which a potential difference of one volt results in 
      a static charge of one coulomb.
    </description>
    <unit>
      <name>Farad</name>
      <symbol>F</symbol>
      <factor>1</factor>
      <description>1 farad is the reference unit of capacitance.</description>
    </unit>
    <unit>
      <name>Millifarad</name>
      <symbol>mF</symbol>
      <factor>1E-3</factor>
      <description>1 millifarad is 1/1 000 of a farad.</description>
    </unit>
    <unit>
      <name>Microfarad</name>
      <symbol>µF</symbol>
      <alias>uF</alias>
      <factor>1E-6</factor>
      <description>1 microfarad is 1/1 000 of a millifarad.</description>
    </unit>
    <unit>
      <name>Nanofarad</name>
      <symbol>nF</symbol>
      <factor>1E-9</factor>
      <description>1 nanofarad is 1/1 000 of a microfarad.</description>
    </unit>
    <unit>
      <name>Picofarad</name>
      <symbol>pF</symbol>
      <factor>1E-12</factor>
      <description>1 picofarad is 1/1 000 of a nanofarad.</description>
    </unit>
  </quantity>
  <quantity system-id="net.sf.basedb.core.Quantity.MAGNETIC_FIELD">
    <name>Magnetic field</name>
    <reference-unit>1 tesla</reference-unit>
    <description>
      One tesla is equal to one weber per square meter. See 
      http://en.wikipedia.org/wiki/Tesla_(unit)
    </description>
    <unit>
      <name>Tesla</name>
      <symbol>T</symbol>
      <factor>1</factor>
      <description>1 tesla is the reference unit of magnetic field.</description>
    </unit>
    <unit>
      <name>Millitesla</name>
      <symbol>mT</symbol>
      <factor>1E-3</factor>
      <description>1 millitesla is 1/1 000 of a tesla.</description>
    </unit>
    <unit>
      <name>Microtesla</name>
      <symbol>µT</symbol>
      <alias>uT</alias>
      <factor>1E-6</factor>
      <description>1 microtesla is 1/1 000 of a millitesla.</description>
    </unit>
    <unit>
      <name>Nanotesla</name>
      <symbol>nT</symbol>
      <factor>1E-9</factor>
      <description>1 nanotesla is 1/1 000 of a microtesla.</description>
    </unit>
  </quantity>
  <quantity system-id="net.sf.basedb.core.Quantity.MAGNETIC_FLUX">
    <name>Magnetic flux</name>
    <reference-unit>1 weber</reference-unit>
    <description>
      One weber is the magnetic flux which, linking a circuit of one turn, would produce 
      in it an electromotive force of 1 volt if it were reduced to zero at a uniform rate in 1 second.
      See http://en.wikipedia.org/wiki/Weber_(unit)
    </description>
    <unit>
      <name>Weber</name>
      <symbol>Wb</symbol>
      <factor>1</factor>
      <description>1 weber is the reference unit of magnetic flux.</description>
    </unit>
    <unit>
      <name>Milliweber</name>
      <symbol>mWb</symbol>
      <factor>1E-3</factor>
      <description>1 milliweber is 1/1 000 of a weber.</description>
    </unit>
    <unit>
      <name>Microweber</name>
      <symbol>µWb</symbol>
      <alias>uWb</alias>
      <factor>1E-6</factor>
      <description>1 microweber is 1/1 000 of a milliweber.</description>
    </unit>
    <unit>
      <name>Nanoweber</name>
      <symbol>nWb</symbol>
      <factor>1E-9</factor>
      <description>1 nanoweber is 1/1 000 of a microweber.</description>
    </unit>
  </quantity>
  <quantity system-id="net.sf.basedb.core.Quantity.ABSORBED_DOSE">
    <name>Dose (absorbed)</name>
    <reference-unit>1 gray</reference-unit>
    <description>
      One gray is the absorption of one joule of radiation energy by one kilogram of matter.
      See http://en.wikipedia.org/wiki/Gray_(unit) and http://en.wikipedia.org/wiki/Absorbed_dose
    </description>
    <unit>
      <name>Gray</name>
      <symbol>Gy</symbol>
      <factor>1</factor>
      <description>1 gray is the reference unit of absorbed dose.</description>
    </unit>
    <unit>
      <name>Milligray</name>
      <symbol>mGy</symbol>
      <factor>1E-3</factor>
      <description>1 milligray is 1/1 000 of a gray.</description>
    </unit>
    <unit>
      <name>Microgray</name>
      <symbol>µGy</symbol>
      <alias>uGy</alias>
      <factor>1E-6</factor>
      <description>1 microgray is 1/1 000 of a milligray.</description>
    </unit>
  </quantity>
  <quantity system-id="net.sf.basedb.core.Quantity.EQUIVALENT_DOSE">
    <name>Dose (equivalent)</name>
    <reference-unit>1 sievert</reference-unit>
    <description>
      The equivalent dose attempts to reflect the biological effects of radiation as
      opposed to the physical aspects, which are characterised by the absorbed dose.
      See http://en.wikipedia.org/wiki/Sievert and http://en.wikipedia.org/wiki/Effective_dose
    </description>
    <unit>
      <name>Sievert</name>
      <symbol>Sv</symbol>
      <factor>1</factor>
      <description>1 sievert is the reference unit of equivalent dose.</description>
    </unit>
    <unit>
      <name>Millisievert</name>
      <symbol>mSv</symbol>
      <factor>1E-3</factor>
      <description>1 millisievert is 1/1 000 of a sievert.</description>
    </unit>
    <unit>
      <name>Microsievert</name>
      <symbol>µSv</symbol>
      <alias>uSv</alias>
      <factor>1E-6</factor>
      <description>1 microsievert is 1/1 000 of a millisievert.</description>
    </unit>
  </quantity>
  <quantity system-id="net.sf.basedb.core.Quantity.RADIOACTIVITY">
    <name>Radioactivity</name>
    <reference-unit>1 becquerel</reference-unit>
    <description>
      1 Bq is defined as the activity of a quantity of radioactive material in 
      which one nucleus decays per second. See http://en.wikipedia.org/wiki/Becquerel
    </description>
    <unit>
      <name>Becquerel</name>
      <symbol>Bq</symbol>
      <factor>1</factor>
      <description>1 becquerel is the reference unit of radioactivity.</description>
    </unit>
    <unit>
      <name>Kilobecquerel</name>
      <symbol>kBq</symbol>
      <factor>1000</factor>
      <description>1 kilobecquerel is 1 000 becquerels.</description>
    </unit>
    <unit>
      <name>Megabecquerel</name>
      <symbol>MBq</symbol>
      <factor>1E6</factor>
      <description>1 megabecquerel is 1 000 000 becquerels.</description>
    </unit>
    <unit>
      <name>Gigabecquerel</name>
      <symbol>GBq</symbol>
      <factor>1E9</factor>
      <description>1 gigabecquerel is 1 000 000 000 becquerels.</description>
    </unit>
  </quantity>
  <quantity system-id="net.sf.basedb.core.Quantity.FRACTION">
    <name>Fraction</name>
    <reference-unit>1</reference-unit>
    <description>
      Fractions are used to denote relative proportions in 
      any measured quantity. A fraction is always dimensionless.
      See http://en.wikipedia.org/wiki/Parts-per_notation
    </description>
    <unit>
      <name>Percent</name>
      <symbol>%</symbol>
      <factor>0.01</factor>
      <description>1 percent is 1/100 of the whole.</description>
    </unit>
    <unit>
      <name>Permille</name>
      <symbol>‰</symbol>
      <factor>0.001</factor>
      <description>1 permille is 1/1 000 of the whole.</description>
    </unit>
    <unit>
      <name>Part-per-million</name>
      <symbol>ppm</symbol>
      <factor>1E-6</factor>
      <description>1 part-per-million is 1/1 000 000 of the whole.</description>
    </unit>
  </quantity>
  <quantity system-id="net.sf.basedb.core.Quantity.ACCELERATION">
    <name>Acceleration</name>
    <reference-unit>1 m/s²</reference-unit>
    <description>
      Acceleration is the increase (or decrease) of speed per unit of time.
      See http://en.wikipedia.org/wiki/Acceleration
    </description>
    <unit>
      <name>Meters per second squared</name>
      <symbol>m/s²</symbol>
      <alias>m/s2</alias>
      <factor>1</factor>
      <description>1 meter per second squared is the reference unit of acceleration.</description>
    </unit>
  </quantity>
  <quantity system-id="net.sf.basedb.core.Quantity.TORQUE">
    <name>Torque</name>
    <reference-unit>1 Nm</reference-unit>
    <description>
      A torque is a pseudo-vector that measures the tendency of a force to rotate 
      an object about some axis.
      See http://en.wikipedia.org/wiki/Torque
    </description>
    <unit>
      <name>Kilonewtonmeter</name>
      <symbol>kNm</symbol>
      <factor>1000</factor>
      <description>1 kilonewtonmeter is 1 000 newtonmeters.</description>
    </unit>
    <unit>
      <name>Newtonmeter</name>
      <symbol>Nm</symbol>
      <factor>1</factor>
      <description>1 newtonmeter is the reference unit of torque.</description>
    </unit>
    <unit>
      <name>Millinewtonmeter</name>
      <symbol>mNm</symbol>
      <factor>1E-3</factor>
      <description>1 millinewtonmeter is 1/1 000 of a newtonmeter.</description>
    </unit>
    <unit>
      <name>Micronewtonmeter</name>
      <symbol>µNm</symbol>
      <alias>uMn</alias>
      <factor>1E-6</factor>
      <description>1 micronewtonmeter is 1/1 000 of a millinewtonmeter.</description>
    </unit>
  </quantity>
  <quantity system-id="net.sf.basedb.core.Quantity.MOMENTUM">
    <name>Momentum</name>
    <reference-unit>1 kg·m/s</reference-unit>
    <description>
      In classical mechanics, momentum is the product of the mass and velocity of an object.
      See http://en.wikipedia.org/wiki/Momentum
    </description>
    <unit>
      <name>Kilogram-meter per second</name>
      <symbol>kgm/s</symbol>
      <alias>Ns</alias>
      <factor>1</factor>
      <description>1 kilogram-meter per second is the reference unit of momentum.</description>
    </unit>
  </quantity>
  <quantity system-id="net.sf.basedb.core.Quantity.FLOW_RATE">
    <name>Flow rate</name>
    <reference-unit>1 m³/s</reference-unit>
    <description>
      The flow rate is the volume that passes through a given surface per unit
      of time. See http://en.wikipedia.org/wiki/Volumetric_flow_rate
    </description>
    <unit>
      <name>Cubic meter per second</name>
      <symbol>m³/s</symbol>
      <alias>m3/s</alias>
      <factor>1</factor>
      <description>1 cubic meter per second is the reference unit of flow rate.</description>
    </unit>
    <unit>
      <name>Liter per second</name>
      <symbol>L/s</symbol>
      <factor>1E-3</factor>
      <description>1 liter per second is 1/1 000 of a cubic meter per second.</description>
    </unit>
    <unit>
      <name>Milliliter per second</name>
      <symbol>mL/s</symbol>
      <alias>cm³/s</alias>
      <alias>cm3/s</alias>
      <factor>1E-6</factor>
      <description>1 milliliter per second is 1/1 000 of a liter per second.</description>
    </unit>
    <unit>
      <name>Microliter per second</name>
      <symbol>µL/s</symbol>
      <alias>uL/s</alias>
      <alias>mm³/s</alias>
      <alias>mm3/s</alias>
      <factor>1E-9</factor>
      <description>1 milliliter per second is 1/1 000 of a liter per second.</description>
    </unit>
  </quantity>
  <quantity system-id="net.sf.basedb.core.Quantity.THERMAL_CONDUCTIVITY">
    <name>Thermal conductivity</name>
    <reference-unit>1 W/(m·K)</reference-unit>
    <description>
      Thermal conductivity is the property of a material that indicates its ability 
      to conduct heat. See http://en.wikipedia.org/wiki/Thermal_conductivity.
    </description>
    <unit>
      <name>Watt per meter and Kelvin</name>
      <symbol>W/m·K</symbol>
      <alias>W/m K</alias>
      <factor>1</factor>
      <description>1 watt per meter and Kelvin is the reference unit of thermal conductivity.</description>
    </unit>
  </quantity>
  <quantity system-id="net.sf.basedb.core.Quantity.STORAGE_SIZE">
    <name>Storage size</name>
    <reference-unit>1 byte</reference-unit>
    <description>
      A byte is the basic unit of for measuring storage 
      requirements for files, etc. We use the binary meaning
      of the prefixes kilo (k), mega (M) and giga (G). Eg. 1
      kilobyte = 1 024 bytes.
    </description>
    <unit>
      <name>Byte</name>
      <symbol>B</symbol>
      <alias>bytes</alias>
      <factor>1</factor>
      <description>1 byte is the reference unit of file size.</description>
    </unit>
    <unit>
      <name>Kilobyte</name>
      <symbol>kB</symbol>
      <factor>1024</factor>
      <description>1 kilobyte is 1 024 bytes.</description>
    </unit>
    <unit>
      <name>Megabyte</name>
      <symbol>MB</symbol>
      <factor>1048576</factor>
      <description>1 megabyte is 1 048 576 bytes.</description>
    </unit>
    <unit>
      <name>Gigabyte</name>
      <symbol>GB</symbol>
      <factor>1073741824</factor>
      <description>1 gigabyte is 1 073 741 824 bytes.</description>
    </unit>
  </quantity>

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