IFC 4.3.x development

8.11.2.82 IfcSIPrefix

8.11.2.82.1 Semantic definitions at the entity

NOTE  Definition according to ISO/CD 10303-41:1992
An SI prefix is the name of a prefix that may be associated with an SI unit. The definitions of SI prefixes are specified in ISO 1000 (clause 3).

NOTE  The prefix defines multiples and submultiples of the SI units.

NOTE  Type adapted from si_prefix defined in ISO 10303-41.

HISTORY  New entity in IFC1.5.1.

Items

EXA

10\^18.

PETA
TERA

10\^12.

GIGA

10\^9.

MEGA

10\^6.

KILO

10\^3.

HECTO
DECA

10.

DECI

10\^-1.

CENTI
MILLI

10\^-6.

MICRO

10\^-6.

NANO

10\^-9.

PICO
FEMTO

10\^-15.

ATTO

10\^-18.

8.11.2.82.1 Formal representations

TYPE IfcSIPrefix = ENUMERATION OF
	(EXA
	,PETA
	,TERA
	,GIGA
	,MEGA
	,KILO
	,HECTO
	,DECA
	,DECI
	,CENTI
	,MILLI
	,MICRO
	,NANO
	,PICO
	,FEMTO
	,ATTO);
END_TYPE;