<?xml version="1.0"?>
<PropertySetDef xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" ifdguid="cecf3a80d1ec11e1800000215ad4efdf" templatetype="PSET_TYPEDRIVENOVERRIDE" xsi:noNamespaceSchemaLocation="http://buildingSMART-tech.org/xml/psd/PSD_IFC4.xsd">
  <IfcVersion version="IFC4" />
  <Name>Pset_MaterialCommon</Name>
  <Definition>A set of general material properties.</Definition>
  <Applicability />
  <ApplicableClasses>
    <ClassName>IfcMaterial</ClassName>
  </ApplicableClasses>
  <ApplicableTypeValue>IfcMaterial</ApplicableTypeValue>
  <PropertyDefs>
    <PropertyDef ifdguid="d262c180d1ec11e1800000215ad4efdf">
      <Name>MolecularWeight</Name>
      <Definition>Molecular weight of material (typically gas).</Definition>
      <PropertyType>
        <TypePropertySingleValue>
          <DataType type="IfcMolecularWeightMeasure" />
        </TypePropertySingleValue>
      </PropertyType>
      <NameAliases>
        <NameAlias lang="en">Molecular Weight</NameAlias>
      </NameAliases>
      <DefinitionAliases>
        <DefinitionAlias lang="en" />
      </DefinitionAliases>
    </PropertyDef>
    <PropertyDef ifdguid="d858a280d1ec11e1800000215ad4efdf">
      <Name>Porosity</Name>
      <Definition>The void fraction of the total volume occupied by material (Vbr - Vnet)/Vbr.</Definition>
      <PropertyType>
        <TypePropertySingleValue>
          <DataType type="IfcNormalisedRatioMeasure" />
        </TypePropertySingleValue>
      </PropertyType>
      <NameAliases>
        <NameAlias lang="en">Porosity</NameAlias>
      </NameAliases>
      <DefinitionAliases>
        <DefinitionAlias lang="en" />
      </DefinitionAliases>
    </PropertyDef>
    <PropertyDef ifdguid="ddb5ed00d1ec11e1800000215ad4efdf">
      <Name>MassDensity</Name>
      <Definition>Material mass density.</Definition>
      <PropertyType>
        <TypePropertySingleValue>
          <DataType type="IfcMassDensityMeasure" />
        </TypePropertySingleValue>
      </PropertyType>
      <NameAliases>
        <NameAlias lang="en">Mass Density</NameAlias>
      </NameAliases>
      <DefinitionAliases>
        <DefinitionAlias lang="en" />
      </DefinitionAliases>
    </PropertyDef>
  </PropertyDefs>
  <PsetDefinitionAliases>
    <PsetDefinitionAlias lang="en" />
  </PsetDefinitionAliases>
</PropertySetDef>