OptionaldisplayThe unit a decimal length is written in; default the value's unit.
OptionalplacesDecimal places, or the fraction of an inch to round to (8 for 1/8"). Default 2 for decimal, 8 otherwise.
Optionalstyledecimal (default), feet-inches or inches.
OptionalsuppressWrite a whole number of feet as 5' rather than 5' - 0".
Options of
IfcModel.formatLength.