Missing unit after parsing MATML

[koubaa]

Material data has a unit type (like density) and then a unit (like kg m^-3)

I have a MATML file which contains:

<ParameterDetails id="pa7">
  <Name>Density</Name>
  <Units name="Density">
    <Unit>
      <Name>kg</Name>
    </Unit>
    <Unit power="-3">
      <Name>m</Name>
    </Unit>
  </Units>
</ParameterDetails>

The matml parser only pulls out the name of the unit, not the full unit string.