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.