The Fortress Language Specification - CiteSeerX

unit name 1 name 2 name 3 : . . .
unit yottaname 1 yottaname 2 Yname 3 = 10 24 name 1
unit zettaname 1 zettaname 2 Zname 3 = 10 21 name 1
unit exaname 1 exaname 2 Ename 3 = 10 18 name 1
unit petaname 1 petaname 2 Pname 3 = 10 15 name 1
unit teraname 1 teraname 2 Tname 3 = 10 12 name 1
unit giganame 1 giganame 2 Gname 3 = 10 9 name 1
unit meganame 1 meganame 2 Mname 3 = 10 6 name 1
unit kiloname 1 kiloname 2 kname 3 = 10 3 name 1
unit hectoname 1 hectoname 2 hname 3 = 10 2 name 1
unit dekaname 1 dekaname 2 daname 3 = 10name 1
unit deciname 1 deciname 2 dname 3 = 10 −1 name 1
unit centiname 1 centiname 2 cname 3 = 10 −2 name 1
unit milliname 1 milliname 2 mname 3 = 10 −3 name 1
unit microname 1 microname 2 µname 3 = 10 −6 name 1
unit nanoname 1 nanoname 2 nname 3 = 10 −9 name 1
unit piconame 1 piconame 2 pname 3 = 10 −12 name 1
unit femtoname 1 femtoname 2 fname 3 = 10 −15 name 1
unit attoname 1 attoname 2 aname 3 = 10 −18 name 1
unit zeptoname 1 zeptoname 2 zname 3 = 10 −21 name 1
unit yoctoname 1 yoctoname 2 yname 3 = 10 −24 name 1
where µ is the Unicode character U+00B5 MICRO SIGN. Third, a dim declaration and a unit or SI unit declaration
may be collapsed into a single declaration by writing the unit or SI unit declaration in place of the default
clause in the dim declaration and omitting the colon and dimension from the unit declaration. Thus
dim Length SI unit meter meters m
dim Power = Energy/Time SI unit watt watts W = joule/second
is understood to abbreviate
dim Length default meter;SI unit meter meters m: Length
dim Power = Energy/Time default watt;SI unit watt watts W: Power = joule/second
In this way the names of the seven SI base units, along with all possible plural and prefixed forms, may be concisely
defined as follows:
dim Length SI unit meter meters m
dim Mass default kilogram;SI unit gram grams g: Mass
dim Time SI unit second seconds s
dim ElectricCurrent SI unit ampere amperes A
dim Temperature SI unit kelvin kelvins K
dim AmountOfSubstance SI unit mole moles mol
dim LuminousIntensity SI unit candela candelas cd
Note the subtle difference in the declaration of Mass that allows the default unit to be kilogram rather than gram.
35.4 Absorbing Units
Syntax:
StaticParam ::= Id [Extends] [absorbs unit ]
| unit Id [ : DimRef ] [absorbs unit ]
239