<?xml version="1.0"?>
<QtoSetDef xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://www.buildingsmart-tech.org/xml/qto/QTO_IFC4.xsd">
  <IfcVersion version="IFC4" />
  <Name>Qto_DistributionChamberElementBaseQuantities</Name>
  <Definition>Base quantities that are common to the definition of all occurrences of distribution chamber elements.</Definition>
  <Applicability />
  <ApplicableClasses>
    <ClassName>IfcDistributionChamberElement</ClassName>
  </ApplicableClasses>
  <ApplicableTypeValue>IfcDistributionChamberElement</ApplicableTypeValue>
  <QtoDefs>
    <QtoDef>
      <Name>GrossSurfaceArea</Name>
      <Definition>Total gross area of the inner surface of the chamber, not taking into account openings such as for pipes, ducts, or cables.</Definition>
      <QtoType>Q_AREA</QtoType>
      <NameAliases>
        <NameAlias lang="en">Gross Surface Area</NameAlias>
      </NameAliases>
      <DefinitionAliases>
        <DefinitionAlias lang="en" />
      </DefinitionAliases>
    </QtoDef>
    <QtoDef>
      <Name>NetSurfaceArea</Name>
      <Definition>Total net area of the inner surface of the chamber, subtracting any openings such as for pipes, ducts, or cables.</Definition>
      <QtoType>Q_AREA</QtoType>
      <NameAliases>
        <NameAlias lang="en">Net Surface Area</NameAlias>
      </NameAliases>
      <DefinitionAliases>
        <DefinitionAlias lang="en" />
      </DefinitionAliases>
    </QtoDef>
    <QtoDef>
      <Name>GrossVolume</Name>
      <Definition>Total gross volume of the chamber, not taking into account any enclosed elements such as pipes, ducts, cables, or equipment.</Definition>
      <QtoType>Q_VOLUME</QtoType>
      <NameAliases>
        <NameAlias lang="en">Gross Volume</NameAlias>
      </NameAliases>
      <DefinitionAliases>
        <DefinitionAlias lang="en" />
      </DefinitionAliases>
    </QtoDef>
    <QtoDef>
      <Name>NetVolume</Name>
      <Definition>Total net volume of the chamber, subtracting any enclosed elements such as pipes, ducts, cables, or equipment.</Definition>
      <QtoType>Q_VOLUME</QtoType>
      <NameAliases>
        <NameAlias lang="en">Net Volume</NameAlias>
      </NameAliases>
      <DefinitionAliases>
        <DefinitionAlias lang="en" />
      </DefinitionAliases>
    </QtoDef>
  </QtoDefs>
  <QtoDefinitionAliases>
    <QtoDefinitionAlias lang="en" />
  </QtoDefinitionAliases>
</QtoSetDef>