Natural language names
Change log
IFC2x3 to IFC4
Semantic definitions at the type
Type definition

The IfcTime identifies a time within a day, expressed by hours, minutes and second. It is expressed by a string value following a particular lexical representation.

The lexical representation for IfcTime is: hh:mm:ss where where hh represents hours, mm minutes and ss seconds. Additional digits can be used to increase the precision of fractional seconds if desired i.e the format ss.ss... A time zone indicator may be provided by a representation of the different to the Coordinated Universal Time. It is appended with a sign [+/-] followed by hh and optionally :mm.

EXAMPLE  13:20:00-05:00 represents 1:20 pm for a time zone which is 5 hours behind Coordinated Universal Time (such as Eastern Standard Time)
NOTE  See extended format representation of time as defined in ISO 8601. The restrictions defined in XML Schema Part 2 apply.
HISTORY  New type in IFC4.
Formal representations
XSD Specification
 <xs:simpleType name="IfcTime">
  <xs:restriction base="xs:normalizedString"/>
 <xs:element name="IfcTime-wrapper" nillable="true">
    <xs:extension base="ifc:IfcTime">
     <xs:attributeGroup ref="ifc:instanceAttributes"/>
EXPRESS Specification

Link to EXPRESS-G diagram EXPRESS-G diagram

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