TEI: Directrices para la codificación y el intercambio de textos electrónicos

<encodingDesc>
 <unitDecl>
  <unitDef xml:id="stadium" type="linear">
   <label>stadium</label>
   <placeName ref="#rome"/>
   <conversion fromUnit="#pes"
    toUnit="#stadium" formula="$fromUnit * 625"/>
   <desc>The stadium was a Roman unit of linear measurement equivalent to 625 pedes, or Roman feet.</desc>
  </unitDef>
 </unitDecl>
</encodingDesc>

<encodingDesc>
 <unitDecl>
  <unitDef xml:id="wmw" type="power">
   <label>whatmeworry</label>
   <conversion fromUnit="#hpk"
    toUnit="#wmw" formula="$fromUnit * 1"/>
   <desc>In the Potrzebie system of measures as introduced by Donald Knuth, the whatmeworry unit of power is equivalent to one hah per kovac.</desc>
  </unitDef>
  <unitDef xml:id="kwmw" type="power">
   <label>kilowhatmeworry</label>
   <conversion fromUnit="#wmw"
    toUnit="#kwmw" formula="$fromUnit div 1000"/>
   <desc>The kilowhatmeworry is equivalent to 1000 whatmeworries.</desc>
  </unitDef>
  <unitDef xml:id="ap" type="power">
   <label>kilowhatmeworry</label>
   <conversion fromUnit="#kwmw"
    toUnit="#ap" formula="$fromUnit div 100"/>
   <desc>One unit of aeolipower (A.P.) is equivalent to 100 kilowhatmeworries.</desc>
  </unitDef>
 </unitDecl>
</encodingDesc>

<conversion fromUnit="#furlongsPerFortnight"
 toUnit="#milesPerHour"
 formula="$fromUnit cast as xs:decimal * 0.000372"/>

<conversion fromUnit="#deciday"
 toUnit="hour"
 formula="$fromUnit cast as xs:decimal * 144 div 60"/>