IfcTunnelTypicalSectionTypeEnum

Item	SPF	XML	Change	Description
IFC4X3_ADD2 to IFC4X4_draft
IfcTunnelTypicalSectionTypeEnum			ADDED

Semantic definitions at the type

Type definition

This enumeration defines the different predefined types of typical tunnel sections that can specify an IfcTunnelTypicalSection.

Enumeration definition

Constant	Description
GEOTECH	Interval along the alignment/built structure with similar ground conditions, as part of the GeotechSynthesis model that represents the connection between the ground model and the built structure. Includes key-properties like expected distribution of ground types (reference to GeotechUnits) and baseline-definition of expected ground conditions and potential hazards, and may also include key-information on design like excavation measures, distribution of support types etc. These properties can be provided using pre- or user-defined property sets, using IfcRelDefinesByProperties or external datasets using IfcRelAssociatesDataset.
EXCAVATIONSUPPORT	Interval along the alignment/built structure with similar support measures. Properties can be provided using pre- or user-defined property sets, using IfcRelDefinesByProperties or external datasets using IfcRelAssociatesDataset.
RISK	Interval along the alignment/built structure with similar risk assessment. Properties can be provided using pre- or user-defined property sets, using IfcRelDefinesByProperties or external datasets using IfcRelAssociatesDataset.
USERDEFINED	User-defined type.
NOTDEFINED	Undefined type.

Formal representations

XML Specification

 <xs:simpleType name="IfcTunnelTypicalSectionTypeEnum">

  <xs:restriction base="xs:string">

   <xs:enumeration value="geotech"/>

   <xs:enumeration value="excavationsupport"/>

   <xs:enumeration value="risk"/>

   <xs:enumeration value="userdefined"/>

   <xs:enumeration value="notdefined"/>

  </xs:restriction>

 </xs:simpleType>

EXPRESS Specification


TYPE IfcTunnelTypicalSectionTypeEnum = ENUMERATION OF (

 GEOTECH, 
 EXCAVATIONSUPPORT, 
 RISK, 
 USERDEFINED, 
 NOTDEFINED);
END_TYPE;


 EXPRESS-G diagram