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  <IfcVersion version="IFC4X4" />
  <Name>Pset_SpatialGeoObsMappedZoneCommon</Name>
  <Definition>Common properties for mapped zone observations.</Definition>
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  <ApplicableClasses>
    <ClassName>IfcSpatialZone/MAPPEDZONE</ClassName>
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      <Name>GSI</Name>
      <Definition>The Geological Strength Index (GSI): A characterization tool for assessing engineering properties for rock masses.</Definition>
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      <Name>RMR</Name>
      <Definition>The rock mass rating (RMR) is a geomechanical classification system for rocks, developed by Z. T. Bieniawski.</Definition>
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          <DataType type="IfcPositiveInteger" />
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      <Name>Q-value</Name>
      <Definition>A description of the rock mass stability of an underground opening in jointed rock masses based on Q-system which was originaly developed at NGI.2015 - Handbook on the Q-System - NGI.</Definition>
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