---
- :names: the number ten for arbitrary powers
  :symbol: '10'
  :primary_code: 10*
  :secondary_code: 10*
  :scale:
    :value: 10.0
    :unit_code: '1'
  :classification: dimless
  :property: number
  :metric: false
  :special: false
  :arbitrary: false
- :names: the number ten for arbitrary powers
  :symbol: '10'
  :primary_code: 10^
  :secondary_code: 10^
  :scale:
    :value: 10.0
    :unit_code: '1'
  :classification: dimless
  :property: number
  :metric: false
  :special: false
  :arbitrary: false
- :names: the number pi
  :symbol: π
  :primary_code: '[pi]'
  :secondary_code: '[PI]'
  :scale:
    :value: 3.141592653589793
    :unit_code: '1'
  :classification: dimless
  :property: number
  :metric: false
  :special: false
  :arbitrary: false
- :names: percent
  :symbol: '%'
  :primary_code: '%'
  :secondary_code: '%'
  :scale:
    :value: 1.0
    :unit_code: 10*-2
  :classification: dimless
  :property: fraction
  :metric: false
  :special: false
  :arbitrary: false
- :names: parts per thousand
  :symbol: ppth
  :primary_code: '[ppth]'
  :secondary_code: '[PPTH]'
  :scale:
    :value: 1.0
    :unit_code: 10*-3
  :classification: dimless
  :property: fraction
  :metric: false
  :special: false
  :arbitrary: false
- :names: parts per million
  :symbol: ppm
  :primary_code: '[ppm]'
  :secondary_code: '[PPM]'
  :scale:
    :value: 1.0
    :unit_code: 10*-6
  :classification: dimless
  :property: fraction
  :metric: false
  :special: false
  :arbitrary: false
- :names: parts per billion
  :symbol: ppb
  :primary_code: '[ppb]'
  :secondary_code: '[PPB]'
  :scale:
    :value: 1.0
    :unit_code: 10*-9
  :classification: dimless
  :property: fraction
  :metric: false
  :special: false
  :arbitrary: false
- :names: parts per trillion
  :symbol: pptr
  :primary_code: '[pptr]'
  :secondary_code: '[PPTR]'
  :scale:
    :value: 1.0
    :unit_code: 10*-12
  :classification: dimless
  :property: fraction
  :metric: false
  :special: false
  :arbitrary: false
- :names: mole
  :symbol: mol
  :primary_code: mol
  :secondary_code: MOL
  :scale:
    :value: 6.0221367
    :unit_code: 10*23
  :classification: si
  :property: amount of substance
  :metric: true
  :special: false
  :arbitrary: false
- :names: steradian
  :symbol: sr
  :primary_code: sr
  :secondary_code: SR
  :scale:
    :value: 1.0
    :unit_code: rad2
  :classification: si
  :property: solid angle
  :metric: true
  :special: false
  :arbitrary: false
- :names: Hertz
  :symbol: Hz
  :primary_code: Hz
  :secondary_code: HZ
  :scale:
    :value: 1.0
    :unit_code: s-1
  :classification: si
  :property: frequency
  :metric: true
  :special: false
  :arbitrary: false
- :names: Newton
  :symbol: N
  :primary_code: N
  :secondary_code: N
  :scale:
    :value: 1.0
    :unit_code: kg.m/s2
  :classification: si
  :property: force
  :metric: true
  :special: false
  :arbitrary: false
- :names: Pascal
  :symbol: Pa
  :primary_code: Pa
  :secondary_code: PAL
  :scale:
    :value: 1.0
    :unit_code: N/m2
  :classification: si
  :property: pressure
  :metric: true
  :special: false
  :arbitrary: false
- :names: Joule
  :symbol: J
  :primary_code: J
  :secondary_code: J
  :scale:
    :value: 1.0
    :unit_code: N.m
  :classification: si
  :property: energy
  :metric: true
  :special: false
  :arbitrary: false
- :names: Watt
  :symbol: W
  :primary_code: W
  :secondary_code: W
  :scale:
    :value: 1.0
    :unit_code: J/s
  :classification: si
  :property: power
  :metric: true
  :special: false
  :arbitrary: false
- :names: Ampère
  :symbol: A
  :primary_code: A
  :secondary_code: A
  :scale:
    :value: 1.0
    :unit_code: C/s
  :classification: si
  :property: electric current
  :metric: true
  :special: false
  :arbitrary: false
- :names: Volt
  :symbol: V
  :primary_code: V
  :secondary_code: V
  :scale:
    :value: 1.0
    :unit_code: J/C
  :classification: si
  :property: electric potential
  :metric: true
  :special: false
  :arbitrary: false
- :names: Farad
  :symbol: F
  :primary_code: F
  :secondary_code: F
  :scale:
    :value: 1.0
    :unit_code: C/V
  :classification: si
  :property: electric capacitance
  :metric: true
  :special: false
  :arbitrary: false
- :names: Ohm
  :symbol: Ω
  :primary_code: Ohm
  :secondary_code: OHM
  :scale:
    :value: 1.0
    :unit_code: V/A
  :classification: si
  :property: electric resistance
  :metric: true
  :special: false
  :arbitrary: false
- :names: Siemens
  :symbol: S
  :primary_code: S
  :secondary_code: SIE
  :scale:
    :value: 1.0
    :unit_code: Ohm-1
  :classification: si
  :property: electric conductance
  :metric: true
  :special: false
  :arbitrary: false
- :names: Weber
  :symbol: Wb
  :primary_code: Wb
  :secondary_code: WB
  :scale:
    :value: 1.0
    :unit_code: V.s
  :classification: si
  :property: magentic flux
  :metric: true
  :special: false
  :arbitrary: false
- :names: degree Celsius
  :symbol: °C
  :primary_code: Cel
  :secondary_code: CEL
  :scale:
    :function_code: cel
    :value: 1.0
    :unit_code: K
  :classification: si
  :property: temperature
  :metric: true
  :special: true
  :arbitrary: false
- :names: Tesla
  :symbol: T
  :primary_code: T
  :secondary_code: T
  :scale:
    :value: 1.0
    :unit_code: Wb/m2
  :classification: si
  :property: magnetic flux density
  :metric: true
  :special: false
  :arbitrary: false
- :names: Henry
  :symbol: H
  :primary_code: H
  :secondary_code: H
  :scale:
    :value: 1.0
    :unit_code: Wb/A
  :classification: si
  :property: inductance
  :metric: true
  :special: false
  :arbitrary: false
- :names: lumen
  :symbol: lm
  :primary_code: lm
  :secondary_code: LM
  :scale:
    :value: 1.0
    :unit_code: cd.sr
  :classification: si
  :property: luminous flux
  :metric: true
  :special: false
  :arbitrary: false
- :names: lux
  :symbol: lx
  :primary_code: lx
  :secondary_code: LX
  :scale:
    :value: 1.0
    :unit_code: lm/m2
  :classification: si
  :property: illuminance
  :metric: true
  :special: false
  :arbitrary: false
- :names: Becquerel
  :symbol: Bq
  :primary_code: Bq
  :secondary_code: BQ
  :scale:
    :value: 1.0
    :unit_code: s-1
  :classification: si
  :property: radioactivity
  :metric: true
  :special: false
  :arbitrary: false
- :names: Gray
  :symbol: Gy
  :primary_code: Gy
  :secondary_code: GY
  :scale:
    :value: 1.0
    :unit_code: J/kg
  :classification: si
  :property: energy dose
  :metric: true
  :special: false
  :arbitrary: false
- :names: Sievert
  :symbol: Sv
  :primary_code: Sv
  :secondary_code: SV
  :scale:
    :value: 1.0
    :unit_code: J/kg
  :classification: si
  :property: dose equivalent
  :metric: true
  :special: false
  :arbitrary: false
- :names:
  - gon
  - grade
  :symbol: □<sup>g</sup>
  :primary_code: gon
  :secondary_code: GON
  :scale:
    :value: 0.9
    :unit_code: deg
  :classification: iso1000
  :property: plane angle
  :metric: false
  :special: false
  :arbitrary: false
- :names: degree
  :symbol: °
  :primary_code: deg
  :secondary_code: DEG
  :scale:
    :value: 2.0
    :unit_code: '[pi].rad/360'
  :classification: iso1000
  :property: plane angle
  :metric: false
  :special: false
  :arbitrary: false
- :names: minute
  :symbol: ''''
  :primary_code: ''''
  :secondary_code: ''''
  :scale:
    :value: 1.0
    :unit_code: deg/60
  :classification: iso1000
  :property: plane angle
  :metric: false
  :special: false
  :arbitrary: false
- :names: second
  :symbol: ''''''
  :primary_code: ''''''
  :secondary_code: ''''''
  :scale:
    :value: 1.0
    :unit_code: '''/60'
  :classification: iso1000
  :property: plane angle
  :metric: false
  :special: false
  :arbitrary: false
- :names: liter
  :symbol: l
  :primary_code: l
  :secondary_code: L
  :scale:
    :value: 1.0
    :unit_code: dm3
  :classification: iso1000
  :property: volume
  :metric: true
  :special: false
  :arbitrary: false
- :names: liter
  :symbol: L
  :primary_code: L
  :scale:
    :value: 1.0
    :unit_code: l
  :classification: iso1000
  :property: volume
  :metric: true
  :special: false
  :arbitrary: false
- :names: are
  :symbol: a
  :primary_code: ar
  :secondary_code: AR
  :scale:
    :value: 100.0
    :unit_code: m2
  :classification: iso1000
  :property: area
  :metric: true
  :special: false
  :arbitrary: false
- :names: minute
  :symbol: min
  :primary_code: min
  :secondary_code: MIN
  :scale:
    :value: 60.0
    :unit_code: s
  :classification: iso1000
  :property: time
  :metric: false
  :special: false
  :arbitrary: false
- :names: hour
  :symbol: h
  :primary_code: h
  :secondary_code: HR
  :scale:
    :value: 60.0
    :unit_code: min
  :classification: iso1000
  :property: time
  :metric: false
  :special: false
  :arbitrary: false
- :names: day
  :symbol: d
  :primary_code: d
  :secondary_code: D
  :scale:
    :value: 24.0
    :unit_code: h
  :classification: iso1000
  :property: time
  :metric: false
  :special: false
  :arbitrary: false
- :names: tropical year
  :symbol: a<sub>t</sub>
  :primary_code: a_t
  :secondary_code: ANN_T
  :scale:
    :value: 365.24219
    :unit_code: d
  :classification: iso1000
  :property: time
  :metric: false
  :special: false
  :arbitrary: false
- :names: mean Julian year
  :symbol: a<sub>j</sub>
  :primary_code: a_j
  :secondary_code: ANN_J
  :scale:
    :value: 365.25
    :unit_code: d
  :classification: iso1000
  :property: time
  :metric: false
  :special: false
  :arbitrary: false
- :names: mean Gregorian year
  :symbol: a<sub>g</sub>
  :primary_code: a_g
  :secondary_code: ANN_G
  :scale:
    :value: 365.2425
    :unit_code: d
  :classification: iso1000
  :property: time
  :metric: false
  :special: false
  :arbitrary: false
- :names: year
  :symbol: a
  :primary_code: a
  :secondary_code: ANN
  :scale:
    :value: 1.0
    :unit_code: a_j
  :classification: iso1000
  :property: time
  :metric: false
  :special: false
  :arbitrary: false
- :names: week
  :symbol: wk
  :primary_code: wk
  :secondary_code: WK
  :scale:
    :value: 7.0
    :unit_code: d
  :classification: iso1000
  :property: time
  :metric: false
  :special: false
  :arbitrary: false
- :names: synodal month
  :symbol: mo<sub>s</sub>
  :primary_code: mo_s
  :secondary_code: MO_S
  :scale:
    :value: 29.53059
    :unit_code: d
  :classification: iso1000
  :property: time
  :metric: false
  :special: false
  :arbitrary: false
- :names: mean Julian month
  :symbol: mo<sub>j</sub>
  :primary_code: mo_j
  :secondary_code: MO_J
  :scale:
    :value: 1.0
    :unit_code: a_j/12
  :classification: iso1000
  :property: time
  :metric: false
  :special: false
  :arbitrary: false
- :names: mean Gregorian month
  :symbol: mo<sub>g</sub>
  :primary_code: mo_g
  :secondary_code: MO_G
  :scale:
    :value: 1.0
    :unit_code: a_g/12
  :classification: iso1000
  :property: time
  :metric: false
  :special: false
  :arbitrary: false
- :names: month
  :symbol: mo
  :primary_code: mo
  :secondary_code: MO
  :scale:
    :value: 1.0
    :unit_code: mo_j
  :classification: iso1000
  :property: time
  :metric: false
  :special: false
  :arbitrary: false
- :names: tonne
  :symbol: t
  :primary_code: t
  :secondary_code: TNE
  :scale:
    :value: 1000.0
    :unit_code: kg
  :classification: iso1000
  :property: mass
  :metric: true
  :special: false
  :arbitrary: false
- :names: bar
  :symbol: bar
  :primary_code: bar
  :secondary_code: BAR
  :scale:
    :value: 100000.0
    :unit_code: Pa
  :classification: iso1000
  :property: pressure
  :metric: true
  :special: false
  :arbitrary: false
- :names: unified atomic mass unit
  :symbol: u
  :primary_code: u
  :secondary_code: AMU
  :scale:
    :value: 1.6605402e-24
    :unit_code: g
  :classification: iso1000
  :property: mass
  :metric: true
  :special: false
  :arbitrary: false
- :names: electronvolt
  :symbol: eV
  :primary_code: eV
  :secondary_code: EV
  :scale:
    :value: 1.0
    :unit_code: '[e].V'
  :classification: iso1000
  :property: energy
  :metric: true
  :special: false
  :arbitrary: false
- :names: astronomic unit
  :symbol: AU
  :primary_code: AU
  :secondary_code: ASU
  :scale:
    :value: 149597.87
    :unit_code: Mm
  :classification: iso1000
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names: parsec
  :symbol: pc
  :primary_code: pc
  :secondary_code: PRS
  :scale:
    :value: 3.085678e+16
    :unit_code: m
  :classification: iso1000
  :property: length
  :metric: true
  :special: false
  :arbitrary: false
- :names: velocity of light
  :symbol: <i>c</i>
  :primary_code: '[c]'
  :secondary_code: '[C]'
  :scale:
    :value: 299792458.0
    :unit_code: m/s
  :classification: const
  :property: velocity
  :metric: true
  :special: false
  :arbitrary: false
- :names: Planck constant
  :symbol: <i>h</i>
  :primary_code: '[h]'
  :secondary_code: '[H]'
  :scale:
    :value: 6.6260755e-24
    :unit_code: J.s
  :classification: const
  :property: action
  :metric: true
  :special: false
  :arbitrary: false
- :names: Boltzmann constant
  :symbol: <i>k</i>
  :primary_code: '[k]'
  :secondary_code: '[K]'
  :scale:
    :value: 1.380658e-23
    :unit_code: J/K
  :classification: const
  :property: (unclassified)
  :metric: true
  :special: false
  :arbitrary: false
- :names: permittivity of vacuum
  :symbol: <i>ε<sub><r>0</r></sub></i>
  :primary_code: '[eps_0]'
  :secondary_code: '[eps_0]'
  :scale:
    :value: 8.854187817e-12
    :unit_code: F/m
  :classification: const
  :property: electric permittivity
  :metric: true
  :special: false
  :arbitrary: false
- :names: permeability of vacuum
  :symbol: <i>μ<sub><r>0</r></sub></i>
  :primary_code: '[mu_0]'
  :secondary_code: '[mu_0]'
  :scale:
    :value: 1.0
    :unit_code: 4.[pi].10*-7.N/A2
  :classification: const
  :property: magnetic permeability
  :metric: true
  :special: false
  :arbitrary: false
- :names: elementary charge
  :symbol: <i>e</i>
  :primary_code: '[e]'
  :secondary_code: '[E]'
  :scale:
    :value: 1.60217733e-19
    :unit_code: C
  :classification: const
  :property: electric charge
  :metric: true
  :special: false
  :arbitrary: false
- :names: electron mass
  :symbol: <i>m<sub><r>e</r></sub></i>
  :primary_code: '[m_e]'
  :secondary_code: '[M_E]'
  :scale:
    :value: 9.1093897e-28
    :unit_code: g
  :classification: const
  :property: mass
  :metric: true
  :special: false
  :arbitrary: false
- :names: proton mass
  :symbol: <i>m<sub><r>p</r></sub></i>
  :primary_code: '[m_p]'
  :secondary_code: '[M_P]'
  :scale:
    :value: 1.6726231e-24
    :unit_code: g
  :classification: const
  :property: mass
  :metric: true
  :special: false
  :arbitrary: false
- :names: Newtonian constant of gravitation
  :symbol: <i>G</i>
  :primary_code: '[G]'
  :secondary_code: '[GC]'
  :scale:
    :value: 6.67259e-11
    :unit_code: m3.kg-1.s-2
  :classification: const
  :property: (unclassified)
  :metric: true
  :special: false
  :arbitrary: false
- :names: standard acceleration of free fall
  :symbol: <i>g<sub>n</sub></i>
  :primary_code: '[g]'
  :secondary_code: '[G]'
  :scale:
    :value: 9.80665
    :unit_code: m/s2
  :classification: const
  :property: acceleration
  :metric: true
  :special: false
  :arbitrary: false
- :names: standard atmosphere
  :symbol: atm
  :primary_code: atm
  :secondary_code: ATM
  :scale:
    :value: 101325.0
    :unit_code: Pa
  :classification: const
  :property: pressure
  :metric: false
  :special: false
  :arbitrary: false
- :names: light-year
  :symbol: l.y.
  :primary_code: '[ly]'
  :secondary_code: '[LY]'
  :scale:
    :value: 1.0
    :unit_code: '[c].a_j'
  :classification: const
  :property: length
  :metric: true
  :special: false
  :arbitrary: false
- :names: gram-force
  :symbol: gf
  :primary_code: gf
  :secondary_code: GF
  :scale:
    :value: 1.0
    :unit_code: g.[g]
  :classification: const
  :property: force
  :metric: true
  :special: false
  :arbitrary: false
- :names: pound force
  :symbol: lbf
  :primary_code: '[lbf_av]'
  :secondary_code: '[LBF_AV]'
  :scale:
    :value: 1.0
    :unit_code: '[lb_av].[g]'
  :classification: const
  :property: force
  :metric: false
  :special: false
  :arbitrary: false
- :names: Kayser
  :symbol: K
  :primary_code: Ky
  :secondary_code: KY
  :scale:
    :value: 1.0
    :unit_code: cm-1
  :classification: cgs
  :property: lineic number
  :metric: true
  :special: false
  :arbitrary: false
- :names: Gal
  :symbol: Gal
  :primary_code: Gal
  :secondary_code: GL
  :scale:
    :value: 1.0
    :unit_code: cm/s2
  :classification: cgs
  :property: acceleration
  :metric: true
  :special: false
  :arbitrary: false
- :names: dyne
  :symbol: dyn
  :primary_code: dyn
  :secondary_code: DYN
  :scale:
    :value: 1.0
    :unit_code: g.cm/s2
  :classification: cgs
  :property: force
  :metric: true
  :special: false
  :arbitrary: false
- :names: erg
  :symbol: erg
  :primary_code: erg
  :secondary_code: ERG
  :scale:
    :value: 1.0
    :unit_code: dyn.cm
  :classification: cgs
  :property: energy
  :metric: true
  :special: false
  :arbitrary: false
- :names: Poise
  :symbol: P
  :primary_code: P
  :secondary_code: P
  :scale:
    :value: 1.0
    :unit_code: dyn.s/cm2
  :classification: cgs
  :property: dynamic viscosity
  :metric: true
  :special: false
  :arbitrary: false
- :names: Biot
  :symbol: Bi
  :primary_code: Bi
  :secondary_code: BI
  :scale:
    :value: 10.0
    :unit_code: A
  :classification: cgs
  :property: electric current
  :metric: true
  :special: false
  :arbitrary: false
- :names: Stokes
  :symbol: St
  :primary_code: St
  :secondary_code: ST
  :scale:
    :value: 1.0
    :unit_code: cm2/s
  :classification: cgs
  :property: kinematic viscosity
  :metric: true
  :special: false
  :arbitrary: false
- :names: Maxwell
  :symbol: Mx
  :primary_code: Mx
  :secondary_code: MX
  :scale:
    :value: 1.0e-08
    :unit_code: Wb
  :classification: cgs
  :property: flux of magnetic induction
  :metric: true
  :special: false
  :arbitrary: false
- :names: Gauss
  :symbol: Gs
  :primary_code: G
  :secondary_code: GS
  :scale:
    :value: 0.0001
    :unit_code: T
  :classification: cgs
  :property: magnetic flux density
  :metric: true
  :special: false
  :arbitrary: false
- :names: Oersted
  :symbol: Oe
  :primary_code: Oe
  :secondary_code: OE
  :scale:
    :value: 250.0
    :unit_code: /[pi].A/m
  :classification: cgs
  :property: magnetic field intensity
  :metric: true
  :special: false
  :arbitrary: false
- :names: Gilbert
  :symbol: Gb
  :primary_code: Gb
  :secondary_code: GB
  :scale:
    :value: 1.0
    :unit_code: Oe.cm
  :classification: cgs
  :property: magnetic tension
  :metric: true
  :special: false
  :arbitrary: false
- :names: stilb
  :symbol: sb
  :primary_code: sb
  :secondary_code: SB
  :scale:
    :value: 1.0
    :unit_code: cd/cm2
  :classification: cgs
  :property: lum. intensity density
  :metric: true
  :special: false
  :arbitrary: false
- :names: Lambert
  :symbol: L
  :primary_code: Lmb
  :secondary_code: LMB
  :scale:
    :value: 1.0
    :unit_code: cd/cm2/[pi]
  :classification: cgs
  :property: brightness
  :metric: true
  :special: false
  :arbitrary: false
- :names: phot
  :symbol: ph
  :primary_code: ph
  :secondary_code: PHT
  :scale:
    :value: 0.0001
    :unit_code: lx
  :classification: cgs
  :property: illuminance
  :metric: true
  :special: false
  :arbitrary: false
- :names: Curie
  :symbol: Ci
  :primary_code: Ci
  :secondary_code: CI
  :scale:
    :value: 37000000000.0
    :unit_code: Bq
  :classification: cgs
  :property: radioactivity
  :metric: true
  :special: false
  :arbitrary: false
- :names: Roentgen
  :symbol: R
  :primary_code: R
  :secondary_code: ROE
  :scale:
    :value: 0.000258
    :unit_code: C/kg
  :classification: cgs
  :property: ion dose
  :metric: true
  :special: false
  :arbitrary: false
- :names: radiation absorbed dose
  :symbol: RAD
  :primary_code: RAD
  :secondary_code: '[RAD]'
  :scale:
    :value: 100.0
    :unit_code: erg/g
  :classification: cgs
  :property: energy dose
  :metric: true
  :special: false
  :arbitrary: false
- :names: radiation equivalent man
  :symbol: REM
  :primary_code: REM
  :secondary_code: '[REM]'
  :scale:
    :value: 1.0
    :unit_code: RAD
  :classification: cgs
  :property: dose equivalent
  :metric: true
  :special: false
  :arbitrary: false
- :names: inch
  :symbol: in
  :primary_code: '[in_i]'
  :secondary_code: '[IN_I]'
  :scale:
    :value: 2.54
    :unit_code: cm
  :classification: intcust
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names: foot
  :symbol: ft
  :primary_code: '[ft_i]'
  :secondary_code: '[FT_I]'
  :scale:
    :value: 12.0
    :unit_code: '[in_i]'
  :classification: intcust
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names: yard
  :symbol: yd
  :primary_code: '[yd_i]'
  :secondary_code: '[YD_I]'
  :scale:
    :value: 3.0
    :unit_code: '[ft_i]'
  :classification: intcust
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names: statute mile
  :symbol: mi
  :primary_code: '[mi_i]'
  :secondary_code: '[MI_I]'
  :scale:
    :value: 5280.0
    :unit_code: '[ft_i]'
  :classification: intcust
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names: fathom
  :symbol: fth
  :primary_code: '[fth_i]'
  :secondary_code: '[FTH_I]'
  :scale:
    :value: 6.0
    :unit_code: '[ft_i]'
  :classification: intcust
  :property: depth of water
  :metric: false
  :special: false
  :arbitrary: false
- :names: nautical mile
  :symbol: n.mi
  :primary_code: '[nmi_i]'
  :secondary_code: '[NMI_I]'
  :scale:
    :value: 1852.0
    :unit_code: m
  :classification: intcust
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names: knot
  :symbol: knot
  :primary_code: '[kn_i]'
  :secondary_code: '[KN_I]'
  :scale:
    :value: 1.0
    :unit_code: '[nmi_i]/h'
  :classification: intcust
  :property: velocity
  :metric: false
  :special: false
  :arbitrary: false
- :names: square inch
  :primary_code: '[sin_i]'
  :secondary_code: '[SIN_I]'
  :scale:
    :value: 1.0
    :unit_code: '[in_i]2'
  :classification: intcust
  :property: area
  :metric: false
  :special: false
  :arbitrary: false
- :names: square foot
  :primary_code: '[sft_i]'
  :secondary_code: '[SFT_I]'
  :scale:
    :value: 1.0
    :unit_code: '[ft_i]2'
  :classification: intcust
  :property: area
  :metric: false
  :special: false
  :arbitrary: false
- :names: square yard
  :primary_code: '[syd_i]'
  :secondary_code: '[SYD_I]'
  :scale:
    :value: 1.0
    :unit_code: '[yd_i]2'
  :classification: intcust
  :property: area
  :metric: false
  :special: false
  :arbitrary: false
- :names: cubic inch
  :primary_code: '[cin_i]'
  :secondary_code: '[CIN_I]'
  :scale:
    :value: 1.0
    :unit_code: '[in_i]3'
  :classification: intcust
  :property: volume
  :metric: false
  :special: false
  :arbitrary: false
- :names: cubic foot
  :primary_code: '[cft_i]'
  :secondary_code: '[CFT_I]'
  :scale:
    :value: 1.0
    :unit_code: '[ft_i]3'
  :classification: intcust
  :property: volume
  :metric: false
  :special: false
  :arbitrary: false
- :names: cubic yard
  :symbol: cu.yd
  :primary_code: '[cyd_i]'
  :secondary_code: '[CYD_I]'
  :scale:
    :value: 1.0
    :unit_code: '[yd_i]3'
  :classification: intcust
  :property: volume
  :metric: false
  :special: false
  :arbitrary: false
- :names: board foot
  :primary_code: '[bf_i]'
  :secondary_code: '[BF_I]'
  :scale:
    :value: 144.0
    :unit_code: '[in_i]3'
  :classification: intcust
  :property: volume
  :metric: false
  :special: false
  :arbitrary: false
- :names: cord
  :primary_code: '[cr_i]'
  :secondary_code: '[CR_I]'
  :scale:
    :value: 128.0
    :unit_code: '[ft_i]3'
  :classification: intcust
  :property: volume
  :metric: false
  :special: false
  :arbitrary: false
- :names: mil
  :symbol: mil
  :primary_code: '[mil_i]'
  :secondary_code: '[MIL_I]'
  :scale:
    :value: 0.001
    :unit_code: '[in_i]'
  :classification: intcust
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names: circular mil
  :symbol: circ.mil
  :primary_code: '[cml_i]'
  :secondary_code: '[CML_I]'
  :scale:
    :value: 1.0
    :unit_code: '[pi]/4.[mil_i]2'
  :classification: intcust
  :property: area
  :metric: false
  :special: false
  :arbitrary: false
- :names: hand
  :symbol: hd
  :primary_code: '[hd_i]'
  :secondary_code: '[HD_I]'
  :scale:
    :value: 4.0
    :unit_code: '[in_i]'
  :classification: intcust
  :property: height of horses
  :metric: false
  :special: false
  :arbitrary: false
- :names: foot
  :symbol: ft<sub>us</sub>
  :primary_code: '[ft_us]'
  :secondary_code: '[FT_US]'
  :scale:
    :value: 1200.0
    :unit_code: m/3937
  :classification: us-lengths
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names: yard
  :primary_code: '[yd_us]'
  :secondary_code: '[YD_US]'
  :scale:
    :value: 3.0
    :unit_code: '[ft_us]'
  :classification: us-lengths
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names: inch
  :primary_code: '[in_us]'
  :secondary_code: '[IN_US]'
  :scale:
    :value: 1.0
    :unit_code: '[ft_us]/12'
  :classification: us-lengths
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names: rod
  :primary_code: '[rd_us]'
  :secondary_code: '[RD_US]'
  :scale:
    :value: 16.5
    :unit_code: '[ft_us]'
  :classification: us-lengths
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names:
  - Gunter's chain
  - Surveyor's chain
  :primary_code: '[ch_us]'
  :secondary_code: '[CH_US]'
  :scale:
    :value: 4.0
    :unit_code: '[rd_us]'
  :classification: us-lengths
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names: link for Gunter's chain
  :primary_code: '[lk_us]'
  :secondary_code: '[LK_US]'
  :scale:
    :value: 1.0
    :unit_code: '[ch_us]/100'
  :classification: us-lengths
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names:
  - Ramden's chain
  - Engineer's chain
  :primary_code: '[rch_us]'
  :secondary_code: '[RCH_US]'
  :scale:
    :value: 100.0
    :unit_code: '[ft_us]'
  :classification: us-lengths
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names: link for Ramden's chain
  :primary_code: '[rlk_us]'
  :secondary_code: '[RLK_US]'
  :scale:
    :value: 1.0
    :unit_code: '[rch_us]/100'
  :classification: us-lengths
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names: fathom
  :primary_code: '[fth_us]'
  :secondary_code: '[FTH_US]'
  :scale:
    :value: 6.0
    :unit_code: '[ft_us]'
  :classification: us-lengths
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names: furlong
  :primary_code: '[fur_us]'
  :secondary_code: '[FUR_US]'
  :scale:
    :value: 40.0
    :unit_code: '[rd_us]'
  :classification: us-lengths
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names: mile
  :primary_code: '[mi_us]'
  :secondary_code: '[MI_US]'
  :scale:
    :value: 8.0
    :unit_code: '[fur_us]'
  :classification: us-lengths
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names: acre
  :primary_code: '[acr_us]'
  :secondary_code: '[ACR_US]'
  :scale:
    :value: 160.0
    :unit_code: '[rd_us]2'
  :classification: us-lengths
  :property: area
  :metric: false
  :special: false
  :arbitrary: false
- :names: square rod
  :primary_code: '[srd_us]'
  :secondary_code: '[SRD_US]'
  :scale:
    :value: 1.0
    :unit_code: '[rd_us]2'
  :classification: us-lengths
  :property: area
  :metric: false
  :special: false
  :arbitrary: false
- :names: square mile
  :primary_code: '[smi_us]'
  :secondary_code: '[SMI_US]'
  :scale:
    :value: 1.0
    :unit_code: '[mi_us]2'
  :classification: us-lengths
  :property: area
  :metric: false
  :special: false
  :arbitrary: false
- :names: section
  :primary_code: '[sct]'
  :secondary_code: '[SCT]'
  :scale:
    :value: 1.0
    :unit_code: '[mi_us]2'
  :classification: us-lengths
  :property: area
  :metric: false
  :special: false
  :arbitrary: false
- :names: township
  :primary_code: '[twp]'
  :secondary_code: '[TWP]'
  :scale:
    :value: 36.0
    :unit_code: '[sct]'
  :classification: us-lengths
  :property: area
  :metric: false
  :special: false
  :arbitrary: false
- :names: mil
  :primary_code: '[mil_us]'
  :secondary_code: '[MIL_US]'
  :scale:
    :value: 0.001
    :unit_code: '[in_us]'
  :classification: us-lengths
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names: inch
  :primary_code: '[in_br]'
  :secondary_code: '[IN_BR]'
  :scale:
    :value: 2.539998
    :unit_code: cm
  :classification: brit-length
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names: foot
  :primary_code: '[ft_br]'
  :secondary_code: '[FT_BR]'
  :scale:
    :value: 12.0
    :unit_code: '[in_br]'
  :classification: brit-length
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names: rod
  :primary_code: '[rd_br]'
  :secondary_code: '[RD_BR]'
  :scale:
    :value: 16.5
    :unit_code: '[ft_br]'
  :classification: brit-length
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names: Gunter's chain
  :primary_code: '[ch_br]'
  :secondary_code: '[CH_BR]'
  :scale:
    :value: 4.0
    :unit_code: '[rd_br]'
  :classification: brit-length
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names: link for Gunter's chain
  :primary_code: '[lk_br]'
  :secondary_code: '[LK_BR]'
  :scale:
    :value: 1.0
    :unit_code: '[ch_br]/100'
  :classification: brit-length
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names: fathom
  :primary_code: '[fth_br]'
  :secondary_code: '[FTH_BR]'
  :scale:
    :value: 6.0
    :unit_code: '[ft_br]'
  :classification: brit-length
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names: pace
  :primary_code: '[pc_br]'
  :secondary_code: '[PC_BR]'
  :scale:
    :value: 2.5
    :unit_code: '[ft_br]'
  :classification: brit-length
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names: yard
  :primary_code: '[yd_br]'
  :secondary_code: '[YD_BR]'
  :scale:
    :value: 3.0
    :unit_code: '[ft_br]'
  :classification: brit-length
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names: mile
  :primary_code: '[mi_br]'
  :secondary_code: '[MI_BR]'
  :scale:
    :value: 5280.0
    :unit_code: '[ft_br]'
  :classification: brit-length
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names: nautical mile
  :primary_code: '[nmi_br]'
  :secondary_code: '[NMI_BR]'
  :scale:
    :value: 6080.0
    :unit_code: '[ft_br]'
  :classification: brit-length
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names: knot
  :primary_code: '[kn_br]'
  :secondary_code: '[KN_BR]'
  :scale:
    :value: 1.0
    :unit_code: '[nmi_br]/h'
  :classification: brit-length
  :property: velocity
  :metric: false
  :special: false
  :arbitrary: false
- :names: acre
  :primary_code: '[acr_br]'
  :secondary_code: '[ACR_BR]'
  :scale:
    :value: 4840.0
    :unit_code: '[yd_br]2'
  :classification: brit-length
  :property: area
  :metric: false
  :special: false
  :arbitrary: false
- :names: Queen Anne's wine gallon
  :primary_code: '[gal_us]'
  :secondary_code: '[GAL_US]'
  :scale:
    :value: 231.0
    :unit_code: '[in_i]3'
  :classification: us-volumes
  :property: fluid volume
  :metric: false
  :special: false
  :arbitrary: false
- :names: barrel
  :primary_code: '[bbl_us]'
  :secondary_code: '[BBL_US]'
  :scale:
    :value: 42.0
    :unit_code: '[gal_us]'
  :classification: us-volumes
  :property: fluid volume
  :metric: false
  :special: false
  :arbitrary: false
- :names: quart
  :primary_code: '[qt_us]'
  :secondary_code: '[QT_US]'
  :scale:
    :value: 1.0
    :unit_code: '[gal_us]/4'
  :classification: us-volumes
  :property: fluid volume
  :metric: false
  :special: false
  :arbitrary: false
- :names: pint
  :primary_code: '[pt_us]'
  :secondary_code: '[PT_US]'
  :scale:
    :value: 1.0
    :unit_code: '[qt_us]/2'
  :classification: us-volumes
  :property: fluid volume
  :metric: false
  :special: false
  :arbitrary: false
- :names: gill
  :primary_code: '[gil_us]'
  :secondary_code: '[GIL_US]'
  :scale:
    :value: 1.0
    :unit_code: '[pt_us]/4'
  :classification: us-volumes
  :property: fluid volume
  :metric: false
  :special: false
  :arbitrary: false
- :names: fluid ounce
  :symbol: oz fl
  :primary_code: '[foz_us]'
  :secondary_code: '[FOZ_US]'
  :scale:
    :value: 1.0
    :unit_code: '[gil_us]/4'
  :classification: us-volumes
  :property: fluid volume
  :metric: false
  :special: false
  :arbitrary: false
- :names: fluid dram
  :primary_code: '[fdr_us]'
  :secondary_code: '[FDR_US]'
  :scale:
    :value: 1.0
    :unit_code: '[foz_us]/8'
  :classification: us-volumes
  :property: fluid volume
  :metric: false
  :special: false
  :arbitrary: false
- :names: minim
  :primary_code: '[min_us]'
  :secondary_code: '[MIN_US]'
  :scale:
    :value: 1.0
    :unit_code: '[fdr_us]/60'
  :classification: us-volumes
  :property: fluid volume
  :metric: false
  :special: false
  :arbitrary: false
- :names: cord
  :primary_code: '[crd_us]'
  :secondary_code: '[CRD_US]'
  :scale:
    :value: 128.0
    :unit_code: '[ft_i]3'
  :classification: us-volumes
  :property: fluid volume
  :metric: false
  :special: false
  :arbitrary: false
- :names: bushel
  :primary_code: '[bu_us]'
  :secondary_code: '[BU_US]'
  :scale:
    :value: 2150.42
    :unit_code: '[in_i]3'
  :classification: us-volumes
  :property: dry volume
  :metric: false
  :special: false
  :arbitrary: false
- :names: historical winchester gallon
  :primary_code: '[gal_wi]'
  :secondary_code: '[GAL_WI]'
  :scale:
    :value: 1.0
    :unit_code: '[bu_us]/8'
  :classification: us-volumes
  :property: dry volume
  :metric: false
  :special: false
  :arbitrary: false
- :names: peck
  :primary_code: '[pk_us]'
  :secondary_code: '[PK_US]'
  :scale:
    :value: 1.0
    :unit_code: '[bu_us]/4'
  :classification: us-volumes
  :property: dry volume
  :metric: false
  :special: false
  :arbitrary: false
- :names: dry quart
  :primary_code: '[dqt_us]'
  :secondary_code: '[DQT_US]'
  :scale:
    :value: 1.0
    :unit_code: '[pk_us]/8'
  :classification: us-volumes
  :property: dry volume
  :metric: false
  :special: false
  :arbitrary: false
- :names: dry pint
  :primary_code: '[dpt_us]'
  :secondary_code: '[DPT_US]'
  :scale:
    :value: 1.0
    :unit_code: '[dqt_us]/2'
  :classification: us-volumes
  :property: dry volume
  :metric: false
  :special: false
  :arbitrary: false
- :names: tablespoon
  :primary_code: '[tbs_us]'
  :secondary_code: '[TBS_US]'
  :scale:
    :value: 1.0
    :unit_code: '[foz_us]/2'
  :classification: us-volumes
  :property: volume
  :metric: false
  :special: false
  :arbitrary: false
- :names: teaspoon
  :primary_code: '[tsp_us]'
  :secondary_code: '[TSP_US]'
  :scale:
    :value: 1.0
    :unit_code: '[tbs_us]/3'
  :classification: us-volumes
  :property: volume
  :metric: false
  :special: false
  :arbitrary: false
- :names: cup
  :primary_code: '[cup_us]'
  :secondary_code: '[CUP_US]'
  :scale:
    :value: 16.0
    :unit_code: '[tbs_us]'
  :classification: us-volumes
  :property: volume
  :metric: false
  :special: false
  :arbitrary: false
- :names: gallon
  :primary_code: '[gal_br]'
  :secondary_code: '[GAL_BR]'
  :scale:
    :value: 4.54609
    :unit_code: l
  :classification: brit-volumes
  :property: volume
  :metric: false
  :special: false
  :arbitrary: false
- :names: peck
  :primary_code: '[pk_br]'
  :secondary_code: '[PK_BR]'
  :scale:
    :value: 2.0
    :unit_code: '[gal_br]'
  :classification: brit-volumes
  :property: volume
  :metric: false
  :special: false
  :arbitrary: false
- :names: bushel
  :primary_code: '[bu_br]'
  :secondary_code: '[BU_BR]'
  :scale:
    :value: 4.0
    :unit_code: '[pk_br]'
  :classification: brit-volumes
  :property: volume
  :metric: false
  :special: false
  :arbitrary: false
- :names: quart
  :primary_code: '[qt_br]'
  :secondary_code: '[QT_BR]'
  :scale:
    :value: 1.0
    :unit_code: '[gal_br]/4'
  :classification: brit-volumes
  :property: volume
  :metric: false
  :special: false
  :arbitrary: false
- :names: pint
  :primary_code: '[pt_br]'
  :secondary_code: '[PT_BR]'
  :scale:
    :value: 1.0
    :unit_code: '[qt_br]/2'
  :classification: brit-volumes
  :property: volume
  :metric: false
  :special: false
  :arbitrary: false
- :names: gill
  :primary_code: '[gil_br]'
  :secondary_code: '[GIL_BR]'
  :scale:
    :value: 1.0
    :unit_code: '[pt_br]/4'
  :classification: brit-volumes
  :property: volume
  :metric: false
  :special: false
  :arbitrary: false
- :names: fluid ounce
  :primary_code: '[foz_br]'
  :secondary_code: '[FOZ_BR]'
  :scale:
    :value: 1.0
    :unit_code: '[gil_br]/5'
  :classification: brit-volumes
  :property: volume
  :metric: false
  :special: false
  :arbitrary: false
- :names: fluid dram
  :primary_code: '[fdr_br]'
  :secondary_code: '[FDR_BR]'
  :scale:
    :value: 1.0
    :unit_code: '[foz_br]/8'
  :classification: brit-volumes
  :property: volume
  :metric: false
  :special: false
  :arbitrary: false
- :names: minim
  :primary_code: '[min_br]'
  :secondary_code: '[MIN_BR]'
  :scale:
    :value: 1.0
    :unit_code: '[fdr_br]/60'
  :classification: brit-volumes
  :property: volume
  :metric: false
  :special: false
  :arbitrary: false
- :names: grain
  :primary_code: '[gr]'
  :secondary_code: '[GR]'
  :scale:
    :value: 64.79891
    :unit_code: mg
  :classification: avoirdupois
  :property: mass
  :metric: false
  :special: false
  :arbitrary: false
- :names: pound
  :symbol: lb
  :primary_code: '[lb_av]'
  :secondary_code: '[LB_AV]'
  :scale:
    :value: 7000.0
    :unit_code: '[gr]'
  :classification: avoirdupois
  :property: mass
  :metric: false
  :special: false
  :arbitrary: false
- :names: ounce
  :symbol: oz
  :primary_code: '[oz_av]'
  :secondary_code: '[OZ_AV]'
  :scale:
    :value: 1.0
    :unit_code: '[lb_av]/16'
  :classification: avoirdupois
  :property: mass
  :metric: false
  :special: false
  :arbitrary: false
- :names: dram
  :primary_code: '[dr_av]'
  :secondary_code: '[DR_AV]'
  :scale:
    :value: 1.0
    :unit_code: '[oz_av]/16'
  :classification: avoirdupois
  :property: mass
  :metric: false
  :special: false
  :arbitrary: false
- :names:
  - short hundredweight
  - U.S. hundredweight
  :primary_code: '[scwt_av]'
  :secondary_code: '[SCWT_AV]'
  :scale:
    :value: 100.0
    :unit_code: '[lb_av]'
  :classification: avoirdupois
  :property: mass
  :metric: false
  :special: false
  :arbitrary: false
- :names:
  - long hunderdweight
  - British hundredweight
  :primary_code: '[lcwt_av]'
  :secondary_code: '[LCWT_AV]'
  :scale:
    :value: 112.0
    :unit_code: '[lb_av]'
  :classification: avoirdupois
  :property: mass
  :metric: false
  :special: false
  :arbitrary: false
- :names:
  - short ton
  - U.S. ton
  :primary_code: '[ston_av]'
  :secondary_code: '[STON_AV]'
  :scale:
    :value: 20.0
    :unit_code: '[scwt_av]'
  :classification: avoirdupois
  :property: mass
  :metric: false
  :special: false
  :arbitrary: false
- :names:
  - long ton
  - British ton
  :primary_code: '[lton_av]'
  :secondary_code: '[LTON_AV]'
  :scale:
    :value: 20.0
    :unit_code: '[lcwt_av]'
  :classification: avoirdupois
  :property: mass
  :metric: false
  :special: false
  :arbitrary: false
- :names:
  - stone
  - British stone
  :primary_code: '[stone_av]'
  :secondary_code: '[STONE_AV]'
  :scale:
    :value: 14.0
    :unit_code: '[lb_av]'
  :classification: avoirdupois
  :property: mass
  :metric: false
  :special: false
  :arbitrary: false
- :names: pennyweight
  :primary_code: '[pwt_tr]'
  :secondary_code: '[PWT_TR]'
  :scale:
    :value: 24.0
    :unit_code: '[gr]'
  :classification: troy
  :property: mass
  :metric: false
  :special: false
  :arbitrary: false
- :names: ounce
  :primary_code: '[oz_tr]'
  :secondary_code: '[OZ_TR]'
  :scale:
    :value: 20.0
    :unit_code: '[pwt_tr]'
  :classification: troy
  :property: mass
  :metric: false
  :special: false
  :arbitrary: false
- :names: pound
  :primary_code: '[lb_tr]'
  :secondary_code: '[LB_TR]'
  :scale:
    :value: 12.0
    :unit_code: '[oz_tr]'
  :classification: troy
  :property: mass
  :metric: false
  :special: false
  :arbitrary: false
- :names: scruple
  :primary_code: '[sc_ap]'
  :secondary_code: '[SC_AP]'
  :scale:
    :value: 20.0
    :unit_code: '[gr]'
  :classification: apoth
  :property: mass
  :metric: false
  :special: false
  :arbitrary: false
- :names:
  - dram
  - drachm
  :primary_code: '[dr_ap]'
  :secondary_code: '[DR_AP]'
  :scale:
    :value: 3.0
    :unit_code: '[sc_ap]'
  :classification: apoth
  :property: mass
  :metric: false
  :special: false
  :arbitrary: false
- :names: ounce
  :primary_code: '[oz_ap]'
  :secondary_code: '[OZ_AP]'
  :scale:
    :value: 8.0
    :unit_code: '[dr_ap]'
  :classification: apoth
  :property: mass
  :metric: false
  :special: false
  :arbitrary: false
- :names: pound
  :primary_code: '[lb_ap]'
  :secondary_code: '[LB_AP]'
  :scale:
    :value: 12.0
    :unit_code: '[oz_ap]'
  :classification: apoth
  :property: mass
  :metric: false
  :special: false
  :arbitrary: false
- :names: line
  :primary_code: '[lne]'
  :secondary_code: '[LNE]'
  :scale:
    :value: 1.0
    :unit_code: '[in_i]/12'
  :classification: typeset
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names: point
  :primary_code: '[pnt]'
  :secondary_code: '[PNT]'
  :scale:
    :value: 1.0
    :unit_code: '[lne]/6'
  :classification: typeset
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names: pica
  :primary_code: '[pca]'
  :secondary_code: '[PCA]'
  :scale:
    :value: 12.0
    :unit_code: '[pnt]'
  :classification: typeset
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names: Printer's point
  :primary_code: '[pnt_pr]'
  :secondary_code: '[PNT_PR]'
  :scale:
    :value: 0.013837
    :unit_code: '[in_i]'
  :classification: typeset
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names: Printer's pica
  :primary_code: '[pca_pr]'
  :secondary_code: '[PCA_PR]'
  :scale:
    :value: 12.0
    :unit_code: '[pnt_pr]'
  :classification: typeset
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names:
  - pied
  - French foot
  :primary_code: '[pied]'
  :secondary_code: '[PIED]'
  :scale:
    :value: 32.48
    :unit_code: cm
  :classification: typeset
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names:
  - pouce
  - French inch
  :primary_code: '[pouce]'
  :secondary_code: '[POUCE]'
  :scale:
    :value: 1.0
    :unit_code: '[pied]/12'
  :classification: typeset
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names:
  - ligne
  - French line
  :primary_code: '[ligne]'
  :secondary_code: '[LIGNE]'
  :scale:
    :value: 1.0
    :unit_code: '[pouce]/12'
  :classification: typeset
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names:
  - didot
  - Didot's point
  :primary_code: '[didot]'
  :secondary_code: '[DIDOT]'
  :scale:
    :value: 1.0
    :unit_code: '[ligne]/6'
  :classification: typeset
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names:
  - cicero
  - Didot's pica
  :primary_code: '[cicero]'
  :secondary_code: '[CICERO]'
  :scale:
    :value: 12.0
    :unit_code: '[didot]'
  :classification: typeset
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names: degree Fahrenheit
  :symbol: °F
  :primary_code: '[degF]'
  :secondary_code: '[DEGF]'
  :scale:
    :function_code: degf
    :value: 5.0
    :unit_code: K/9
  :classification: heat
  :property: temperature
  :metric: false
  :special: true
  :arbitrary: false
- :names: calorie at 15 °C
  :symbol: cal<sub>15°C</sub>
  :primary_code: cal_[15]
  :secondary_code: CAL_[15]
  :scale:
    :value: 4.1858
    :unit_code: J
  :classification: heat
  :property: energy
  :metric: true
  :special: false
  :arbitrary: false
- :names: calorie at 20 °C
  :symbol: cal<sub>20°C</sub>
  :primary_code: cal_[20]
  :secondary_code: CAL_[20]
  :scale:
    :value: 4.1819
    :unit_code: J
  :classification: heat
  :property: energy
  :metric: true
  :special: false
  :arbitrary: false
- :names: mean calorie
  :symbol: cal<sub>m</sub>
  :primary_code: cal_m
  :secondary_code: CAL_M
  :scale:
    :value: 4.19002
    :unit_code: J
  :classification: heat
  :property: energy
  :metric: true
  :special: false
  :arbitrary: false
- :names: international table calorie
  :symbol: cal<sub>IT</sub>
  :primary_code: cal_IT
  :secondary_code: CAL_IT
  :scale:
    :value: 4.1868
    :unit_code: J
  :classification: heat
  :property: energy
  :metric: true
  :special: false
  :arbitrary: false
- :names: thermochemical calorie
  :symbol: cal<sub>th</sub>
  :primary_code: cal_th
  :secondary_code: CAL_TH
  :scale:
    :value: 4.184
    :unit_code: J
  :classification: heat
  :property: energy
  :metric: true
  :special: false
  :arbitrary: false
- :names: calorie
  :symbol: cal
  :primary_code: cal
  :secondary_code: CAL
  :scale:
    :value: 1.0
    :unit_code: cal_th
  :classification: heat
  :property: energy
  :metric: true
  :special: false
  :arbitrary: false
- :names: nutrition label Calories
  :symbol: Cal
  :primary_code: '[Cal]'
  :secondary_code: '[CAL]'
  :scale:
    :value: 1.0
    :unit_code: kcal_th
  :classification: heat
  :property: energy
  :metric: false
  :special: false
  :arbitrary: false
- :names: British thermal unit at 39 °F
  :symbol: Btu<sub>39°F</sub>
  :primary_code: '[Btu_39]'
  :secondary_code: '[BTU_39]'
  :scale:
    :value: 1.05967
    :unit_code: kJ
  :classification: heat
  :property: energy
  :metric: false
  :special: false
  :arbitrary: false
- :names: British thermal unit at 59 °F
  :symbol: Btu<sub>59°F</sub>
  :primary_code: '[Btu_59]'
  :secondary_code: '[BTU_59]'
  :scale:
    :value: 1.0548
    :unit_code: kJ
  :classification: heat
  :property: energy
  :metric: false
  :special: false
  :arbitrary: false
- :names: British thermal unit at 60 °F
  :symbol: Btu<sub>60°F</sub>
  :primary_code: '[Btu_60]'
  :secondary_code: '[BTU_60]'
  :scale:
    :value: 1.05468
    :unit_code: kJ
  :classification: heat
  :property: energy
  :metric: false
  :special: false
  :arbitrary: false
- :names: mean British thermal unit
  :symbol: Btu<sub>m</sub>
  :primary_code: '[Btu_m]'
  :secondary_code: '[BTU_M]'
  :scale:
    :value: 1.05587
    :unit_code: kJ
  :classification: heat
  :property: energy
  :metric: false
  :special: false
  :arbitrary: false
- :names: international table British thermal unit
  :symbol: Btu<sub>IT</sub>
  :primary_code: '[Btu_IT]'
  :secondary_code: '[BTU_IT]'
  :scale:
    :value: 1.05505585262
    :unit_code: kJ
  :classification: heat
  :property: energy
  :metric: false
  :special: false
  :arbitrary: false
- :names: thermochemical British thermal unit
  :symbol: Btu<sub>th</sub>
  :primary_code: '[Btu_th]'
  :secondary_code: '[BTU_TH]'
  :scale:
    :value: 1.05435
    :unit_code: kJ
  :classification: heat
  :property: energy
  :metric: false
  :special: false
  :arbitrary: false
- :names: British thermal unit
  :symbol: btu
  :primary_code: '[Btu]'
  :secondary_code: '[BTU]'
  :scale:
    :value: 1.0
    :unit_code: '[Btu_th]'
  :classification: heat
  :property: energy
  :metric: false
  :special: false
  :arbitrary: false
- :names: horsepower
  :primary_code: '[HP]'
  :secondary_code: '[HP]'
  :scale:
    :value: 550.0
    :unit_code: '[ft_i].[lbf_av]/s'
  :classification: heat
  :property: power
  :metric: false
  :special: false
  :arbitrary: false
- :names: meter of water column
  :symbol: m H<sub><r>2</r></sub>O
  :primary_code: m[H2O]
  :secondary_code: M[H2O]
  :scale:
    :value: 9.80665
    :unit_code: kPa
  :classification: clinical
  :property: pressure
  :metric: true
  :special: false
  :arbitrary: false
- :names: meter of mercury column
  :symbol: m Hg
  :primary_code: m[Hg]
  :secondary_code: M[HG]
  :scale:
    :value: 133.322
    :unit_code: kPa
  :classification: clinical
  :property: pressure
  :metric: true
  :special: false
  :arbitrary: false
- :names: inch of water column
  :symbol: in H<sub><r>2</r></sub>O
  :primary_code: '[in_i''H2O]'
  :secondary_code: '[IN_I''H2O]'
  :scale:
    :value: 1.0
    :unit_code: m[H2O].[in_i]/m
  :classification: clinical
  :property: pressure
  :metric: false
  :special: false
  :arbitrary: false
- :names: inch of mercury column
  :symbol: in Hg
  :primary_code: '[in_i''Hg]'
  :secondary_code: '[IN_i''HG]'
  :scale:
    :value: 1.0
    :unit_code: m[Hg].[in_i]/m
  :classification: clinical
  :property: pressure
  :metric: false
  :special: false
  :arbitrary: false
- :names: peripheral vascular resistance unit
  :symbol: P.R.U.
  :primary_code: '[PRU]'
  :secondary_code: '[PRU]'
  :scale:
    :value: 1.0
    :unit_code: mm[Hg].s/ml
  :classification: clinical
  :property: fluid resistance
  :metric: false
  :special: false
  :arbitrary: false
- :names: Wood unit
  :symbol: Wood U.
  :primary_code: '[wood''U]'
  :secondary_code: '[WOOD''U]'
  :scale:
    :value: 1.0
    :unit_code: mm[Hg].min/L
  :classification: clinical
  :property: fluid resistance
  :metric: false
  :special: false
  :arbitrary: false
- :names: diopter
  :symbol: dpt
  :primary_code: '[diop]'
  :secondary_code: '[DIOP]'
  :scale:
    :value: 1.0
    :unit_code: /m
  :classification: clinical
  :property: refraction of a lens
  :metric: false
  :special: false
  :arbitrary: false
- :names: prism diopter
  :symbol: PD
  :primary_code: '[p''diop]'
  :secondary_code: '[P''DIOP]'
  :scale:
    :function_code: 100tan
    :value: 1.0
    :unit_code: deg
  :classification: clinical
  :property: refraction of a prism
  :metric: false
  :special: true
  :arbitrary: false
- :names: percent of slope
  :symbol: '%'
  :primary_code: '%[slope]'
  :secondary_code: '%[SLOPE]'
  :scale:
    :function_code: 100tan
    :value: 1.0
    :unit_code: deg
  :classification: clinical
  :property: slope
  :metric: false
  :special: true
  :arbitrary: false
- :names: mesh
  :primary_code: '[mesh_i]'
  :secondary_code: '[MESH_I]'
  :scale:
    :value: 1.0
    :unit_code: /[in_i]
  :classification: clinical
  :property: lineic number
  :metric: false
  :special: false
  :arbitrary: false
- :names:
  - Charrière
  - french
  :symbol: Ch
  :primary_code: '[Ch]'
  :secondary_code: '[CH]'
  :scale:
    :value: 1.0
    :unit_code: mm/[pi]
  :classification: clinical
  :property: gauge of catheters
  :metric: false
  :special: false
  :arbitrary: false
- :names: drop
  :symbol: drp
  :primary_code: '[drp]'
  :secondary_code: '[DRP]'
  :scale:
    :value: 1.0
    :unit_code: ml/12
  :classification: clinical
  :property: volume
  :metric: false
  :special: false
  :arbitrary: false
- :names: Hounsfield unit
  :symbol: HF
  :primary_code: '[hnsf''U]'
  :secondary_code: '[HNSF''U]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: clinical
  :property: x-ray attenuation
  :metric: false
  :special: false
  :arbitrary: false
- :names: metabolic equivalent
  :symbol: MET
  :primary_code: '[MET]'
  :secondary_code: '[MET]'
  :scale:
    :value: 3.5
    :unit_code: mL/min/kg
  :classification: clinical
  :property: metabolic cost of physical activity
  :metric: false
  :special: false
  :arbitrary: false
- :names: homeopathic potency of decimal series (retired)
  :symbol: X
  :primary_code: '[hp''_X]'
  :secondary_code: '[HP''_X]'
  :scale:
    :function_code: hpX
    :value: 1.0
    :unit_code: '1'
  :classification: clinical
  :property: homeopathic potency (retired)
  :metric: false
  :special: true
  :arbitrary: false
- :names: homeopathic potency of centesimal series (retired)
  :symbol: C
  :primary_code: '[hp''_C]'
  :secondary_code: '[HP''_C]'
  :scale:
    :function_code: hpC
    :value: 1.0
    :unit_code: '1'
  :classification: clinical
  :property: homeopathic potency (retired)
  :metric: false
  :special: true
  :arbitrary: false
- :names: homeopathic potency of millesimal series (retired)
  :symbol: M
  :primary_code: '[hp''_M]'
  :secondary_code: '[HP''_M]'
  :scale:
    :function_code: hpM
    :value: 1.0
    :unit_code: '1'
  :classification: clinical
  :property: homeopathic potency (retired)
  :metric: false
  :special: true
  :arbitrary: false
- :names: homeopathic potency of quintamillesimal series (retired)
  :symbol: Q
  :primary_code: '[hp''_Q]'
  :secondary_code: '[HP''_Q]'
  :scale:
    :function_code: hpQ
    :value: 1.0
    :unit_code: '1'
  :classification: clinical
  :property: homeopathic potency (retired)
  :metric: false
  :special: true
  :arbitrary: false
- :names: homeopathic potency of decimal hahnemannian series
  :symbol: X
  :primary_code: '[hp_X]'
  :secondary_code: '[HP_X]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: clinical
  :property: homeopathic potency (Hahnemann)
  :metric: false
  :special: false
  :arbitrary: true
- :names: homeopathic potency of centesimal hahnemannian series
  :symbol: C
  :primary_code: '[hp_C]'
  :secondary_code: '[HP_C]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: clinical
  :property: homeopathic potency (Hahnemann)
  :metric: false
  :special: false
  :arbitrary: true
- :names: homeopathic potency of millesimal hahnemannian series
  :symbol: M
  :primary_code: '[hp_M]'
  :secondary_code: '[HP_M]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: clinical
  :property: homeopathic potency (Hahnemann)
  :metric: false
  :special: false
  :arbitrary: true
- :names: homeopathic potency of quintamillesimal hahnemannian series
  :symbol: Q
  :primary_code: '[hp_Q]'
  :secondary_code: '[HP_Q]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: clinical
  :property: homeopathic potency (Hahnemann)
  :metric: false
  :special: false
  :arbitrary: true
- :names: homeopathic potency of decimal korsakovian series
  :symbol: X
  :primary_code: '[kp_X]'
  :secondary_code: '[KP_X]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: clinical
  :property: homeopathic potency (Korsakov)
  :metric: false
  :special: false
  :arbitrary: true
- :names: homeopathic potency of centesimal korsakovian series
  :symbol: C
  :primary_code: '[kp_C]'
  :secondary_code: '[KP_C]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: clinical
  :property: homeopathic potency (Korsakov)
  :metric: false
  :special: false
  :arbitrary: true
- :names: homeopathic potency of millesimal korsakovian series
  :symbol: M
  :primary_code: '[kp_M]'
  :secondary_code: '[KP_M]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: clinical
  :property: homeopathic potency (Korsakov)
  :metric: false
  :special: false
  :arbitrary: true
- :names: homeopathic potency of quintamillesimal korsakovian series
  :symbol: Q
  :primary_code: '[kp_Q]'
  :secondary_code: '[KP_Q]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: clinical
  :property: homeopathic potency (Korsakov)
  :metric: false
  :special: false
  :arbitrary: true
- :names: equivalents
  :symbol: eq
  :primary_code: eq
  :secondary_code: EQ
  :scale:
    :value: 1.0
    :unit_code: mol
  :classification: chemical
  :property: amount of substance
  :metric: true
  :special: false
  :arbitrary: false
- :names: osmole
  :symbol: osm
  :primary_code: osm
  :secondary_code: OSM
  :scale:
    :value: 1.0
    :unit_code: mol
  :classification: chemical
  :property: amount of substance (dissolved particles)
  :metric: true
  :special: false
  :arbitrary: false
- :names: pH
  :symbol: pH
  :primary_code: '[pH]'
  :secondary_code: '[PH]'
  :scale:
    :function_code: pH
    :value: 1.0
    :unit_code: mol/l
  :classification: chemical
  :property: acidity
  :metric: false
  :special: true
  :arbitrary: false
- :names: gram percent
  :symbol: g%
  :primary_code: g%
  :secondary_code: G%
  :scale:
    :value: 1.0
    :unit_code: g/dl
  :classification: chemical
  :property: mass concentration
  :metric: true
  :special: false
  :arbitrary: false
- :names: Svedberg unit
  :symbol: S
  :primary_code: '[S]'
  :secondary_code: '[S]'
  :scale:
    :value: 1.0
    :unit_code: 10*-13.s
  :classification: chemical
  :property: sedimentation coefficient
  :metric: false
  :special: false
  :arbitrary: false
- :names: high power field
  :symbol: HPF
  :primary_code: '[HPF]'
  :secondary_code: '[HPF]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: chemical
  :property: view area in microscope
  :metric: false
  :special: false
  :arbitrary: false
- :names: low power field
  :symbol: LPF
  :primary_code: '[LPF]'
  :secondary_code: '[LPF]'
  :scale:
    :value: 100.0
    :unit_code: '1'
  :classification: chemical
  :property: view area in microscope
  :metric: false
  :special: false
  :arbitrary: false
- :names: katal
  :symbol: kat
  :primary_code: kat
  :secondary_code: KAT
  :scale:
    :value: 1.0
    :unit_code: mol/s
  :classification: chemical
  :property: catalytic activity
  :metric: true
  :special: false
  :arbitrary: false
- :names: Unit
  :symbol: U
  :primary_code: U
  :secondary_code: U
  :scale:
    :value: 1.0
    :unit_code: umol/min
  :classification: chemical
  :property: catalytic activity
  :metric: true
  :special: false
  :arbitrary: false
- :names: international unit
  :symbol: IU
  :primary_code: '[iU]'
  :secondary_code: '[IU]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: chemical
  :property: arbitrary
  :metric: true
  :special: false
  :arbitrary: true
- :names: international unit
  :symbol: i.U.
  :primary_code: '[IU]'
  :secondary_code: '[IU]'
  :scale:
    :value: 1.0
    :unit_code: '[iU]'
  :classification: chemical
  :property: arbitrary
  :metric: true
  :special: false
  :arbitrary: true
- :names: arbitary unit
  :symbol: arb. U
  :primary_code: '[arb''U]'
  :secondary_code: '[ARB''U]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: chemical
  :property: arbitrary
  :metric: false
  :special: false
  :arbitrary: true
- :names: United States Pharmacopeia unit
  :symbol: U.S.P.
  :primary_code: '[USP''U]'
  :secondary_code: '[USP''U]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: chemical
  :property: arbitrary
  :metric: false
  :special: false
  :arbitrary: true
- :names: GPL unit
  :primary_code: '[GPL''U]'
  :secondary_code: '[GPL''U]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: chemical
  :property: biologic activity of anticardiolipin IgG
  :metric: false
  :special: false
  :arbitrary: true
- :names: MPL unit
  :primary_code: '[MPL''U]'
  :secondary_code: '[MPL''U]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: chemical
  :property: biologic activity of anticardiolipin IgM
  :metric: false
  :special: false
  :arbitrary: true
- :names: APL unit
  :primary_code: '[APL''U]'
  :secondary_code: '[APL''U]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: chemical
  :property: biologic activity of anticardiolipin IgA
  :metric: false
  :special: false
  :arbitrary: true
- :names: Bethesda unit
  :primary_code: '[beth''U]'
  :secondary_code: '[BETH''U]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: chemical
  :property: biologic activity of factor VIII inhibitor
  :metric: false
  :special: false
  :arbitrary: true
- :names: Todd unit
  :primary_code: '[todd''U]'
  :secondary_code: '[TODD''U]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: chemical
  :property: biologic activity antistreptolysin O
  :metric: false
  :special: false
  :arbitrary: true
- :names: Dye unit
  :primary_code: '[dye''U]'
  :secondary_code: '[DYE''U]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: chemical
  :property: biologic activity of amylase
  :metric: false
  :special: false
  :arbitrary: true
- :names: Somogyi unit
  :primary_code: '[smgy''U]'
  :secondary_code: '[SMGY''U]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: chemical
  :property: biologic activity of amylase
  :metric: false
  :special: false
  :arbitrary: true
- :names: Bodansky unit
  :primary_code: '[bdsk''U]'
  :secondary_code: '[BDSK''U]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: chemical
  :property: biologic activity of phosphatase
  :metric: false
  :special: false
  :arbitrary: true
- :names: King-Armstrong unit
  :primary_code: '[ka''U]'
  :secondary_code: '[KA''U]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: chemical
  :property: biologic activity of phosphatase
  :metric: false
  :special: false
  :arbitrary: true
- :names: Kunkel unit
  :primary_code: '[knk''U]'
  :secondary_code: '[KNK''U]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: chemical
  :property: arbitrary biologic activity
  :metric: false
  :special: false
  :arbitrary: true
- :names: Mac Lagan unit
  :primary_code: '[mclg''U]'
  :secondary_code: '[MCLG''U]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: chemical
  :property: arbitrary biologic activity
  :metric: false
  :special: false
  :arbitrary: true
- :names: tuberculin unit
  :primary_code: '[tb''U]'
  :secondary_code: '[TB''U]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: chemical
  :property: biologic activity of tuberculin
  :metric: false
  :special: false
  :arbitrary: true
- :names: 50% cell culture infectious dose
  :symbol: CCID<sub>50</sub>
  :primary_code: '[CCID_50]'
  :secondary_code: '[CCID_50]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: chemical
  :property: biologic activity (infectivity) of an infectious agent preparation
  :metric: false
  :special: false
  :arbitrary: true
- :names: 50% tissue culture infectious dose
  :symbol: TCID<sub>50</sub>
  :primary_code: '[TCID_50]'
  :secondary_code: '[TCID_50]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: chemical
  :property: biologic activity (infectivity) of an infectious agent preparation
  :metric: false
  :special: false
  :arbitrary: true
- :names: plaque forming units
  :symbol: PFU
  :primary_code: '[PFU]'
  :secondary_code: '[PFU]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: chemical
  :property: amount of an infectious agent
  :metric: false
  :special: false
  :arbitrary: true
- :names: focus forming units
  :symbol: FFU
  :primary_code: '[FFU]'
  :secondary_code: '[FFU]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: chemical
  :property: amount of an infectious agent
  :metric: false
  :special: false
  :arbitrary: true
- :names: colony forming units
  :symbol: CFU
  :primary_code: '[CFU]'
  :secondary_code: '[CFU]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: chemical
  :property: amount of a proliferating organism
  :metric: false
  :special: false
  :arbitrary: true
- :names: bioequivalent allergen unit
  :symbol: BAU
  :primary_code: '[BAU]'
  :secondary_code: '[BAU]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: chemical
  :property: amount of an allergen callibrated through in-vivo testing based on the
    ID50EAL method of (intradermal dilution for 50mm sum of erythema diameters
  :metric: false
  :special: false
  :arbitrary: true
- :names: allergen unit
  :symbol: AU
  :primary_code: '[AU]'
  :secondary_code: '[AU]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: chemical
  :property: procedure defined amount of an allergen using some reference standard
  :metric: false
  :special: false
  :arbitrary: true
- :names: allergen unit for Ambrosia artemisiifolia
  :symbol: Amb a 1 U
  :primary_code: '[Amb''a''1''U]'
  :secondary_code: '[AMB''A''1''U]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: chemical
  :property: procedure defined amount of the major allergen of ragweed.
  :metric: false
  :special: false
  :arbitrary: true
- :names: protein nitrogen unit
  :symbol: PNU
  :primary_code: '[PNU]'
  :secondary_code: '[PNU]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: chemical
  :property: procedure defined amount of a protein substance
  :metric: false
  :special: false
  :arbitrary: true
- :names: Limit of flocculation
  :symbol: Lf
  :primary_code: '[Lf]'
  :secondary_code: '[LF]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: chemical
  :property: procedure defined amount of an antigen substance
  :metric: false
  :special: false
  :arbitrary: true
- :names: D-antigen unit
  :primary_code: '[D''ag''U]'
  :secondary_code: '[D''AG''U]'
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: chemical
  :property: procedure defined amount of an antigen substance
  :metric: false
  :special: false
  :arbitrary: true
- :names: neper
  :symbol: Np
  :primary_code: Np
  :secondary_code: NEP
  :scale:
    :function_code: ln
    :value: 1.0
    :unit_code: '1'
  :classification: levels
  :property: level
  :metric: true
  :special: true
  :arbitrary: false
- :names: bel
  :symbol: B
  :primary_code: B
  :secondary_code: B
  :scale:
    :function_code: lg
    :value: 1.0
    :unit_code: '1'
  :classification: levels
  :property: level
  :metric: true
  :special: true
  :arbitrary: false
- :names: bel sound pressure
  :symbol: B(SPL)
  :primary_code: B[SPL]
  :secondary_code: B[SPL]
  :scale:
    :function_code: 2lg
    :value: 2.0
    :unit_code: 10*-5.Pa
  :classification: levels
  :property: pressure level
  :metric: true
  :special: true
  :arbitrary: false
- :names: bel volt
  :symbol: B(V)
  :primary_code: B[V]
  :secondary_code: B[V]
  :scale:
    :function_code: 2lg
    :value: 1.0
    :unit_code: V
  :classification: levels
  :property: electric potential level
  :metric: true
  :special: true
  :arbitrary: false
- :names: bel millivolt
  :symbol: B(mV)
  :primary_code: B[mV]
  :secondary_code: B[MV]
  :scale:
    :function_code: 2lg
    :value: 1.0
    :unit_code: mV
  :classification: levels
  :property: electric potential level
  :metric: true
  :special: true
  :arbitrary: false
- :names: bel microvolt
  :symbol: B(μV)
  :primary_code: B[uV]
  :secondary_code: B[UV]
  :scale:
    :function_code: 2lg
    :value: 1.0
    :unit_code: uV
  :classification: levels
  :property: electric potential level
  :metric: true
  :special: true
  :arbitrary: false
- :names: bel 10 nanovolt
  :symbol: B(10 nV)
  :primary_code: B[10.nV]
  :secondary_code: B[10.NV]
  :scale:
    :function_code: 2lg
    :value: 10.0
    :unit_code: nV
  :classification: levels
  :property: electric potential level
  :metric: true
  :special: true
  :arbitrary: false
- :names: bel watt
  :symbol: B(W)
  :primary_code: B[W]
  :secondary_code: B[W]
  :scale:
    :function_code: lg
    :value: 1.0
    :unit_code: W
  :classification: levels
  :property: power level
  :metric: true
  :special: true
  :arbitrary: false
- :names: bel kilowatt
  :symbol: B(kW)
  :primary_code: B[kW]
  :secondary_code: B[KW]
  :scale:
    :function_code: lg
    :value: 1.0
    :unit_code: kW
  :classification: levels
  :property: power level
  :metric: true
  :special: true
  :arbitrary: false
- :names: stere
  :symbol: st
  :primary_code: st
  :secondary_code: STR
  :scale:
    :value: 1.0
    :unit_code: m3
  :classification: misc
  :property: volume
  :metric: true
  :special: false
  :arbitrary: false
- :names: Ångström
  :symbol: Å
  :primary_code: Ao
  :secondary_code: AO
  :scale:
    :value: 0.1
    :unit_code: nm
  :classification: misc
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names: barn
  :symbol: b
  :primary_code: b
  :secondary_code: BRN
  :scale:
    :value: 100.0
    :unit_code: fm2
  :classification: misc
  :property: action area
  :metric: false
  :special: false
  :arbitrary: false
- :names: technical atmosphere
  :symbol: at
  :primary_code: att
  :secondary_code: ATT
  :scale:
    :value: 1.0
    :unit_code: kgf/cm2
  :classification: misc
  :property: pressure
  :metric: false
  :special: false
  :arbitrary: false
- :names: mho
  :symbol: mho
  :primary_code: mho
  :secondary_code: MHO
  :scale:
    :value: 1.0
    :unit_code: S
  :classification: misc
  :property: electric conductance
  :metric: true
  :special: false
  :arbitrary: false
- :names: pound per sqare inch
  :symbol: psi
  :primary_code: '[psi]'
  :secondary_code: '[PSI]'
  :scale:
    :value: 1.0
    :unit_code: '[lbf_av]/[in_i]2'
  :classification: misc
  :property: pressure
  :metric: false
  :special: false
  :arbitrary: false
- :names: circle
  :symbol: circ
  :primary_code: circ
  :secondary_code: CIRC
  :scale:
    :value: 2.0
    :unit_code: '[pi].rad'
  :classification: misc
  :property: plane angle
  :metric: false
  :special: false
  :arbitrary: false
- :names: spere
  :symbol: sph
  :primary_code: sph
  :secondary_code: SPH
  :scale:
    :value: 4.0
    :unit_code: '[pi].sr'
  :classification: misc
  :property: solid angle
  :metric: false
  :special: false
  :arbitrary: false
- :names: metric carat
  :symbol: ct<sub>m</sub>
  :primary_code: '[car_m]'
  :secondary_code: '[CAR_M]'
  :scale:
    :value: 0.2
    :unit_code: g
  :classification: misc
  :property: mass
  :metric: false
  :special: false
  :arbitrary: false
- :names: carat of gold alloys
  :symbol: ct<sub><r>Au</r></sub>
  :primary_code: '[car_Au]'
  :secondary_code: '[CAR_AU]'
  :scale:
    :value: 1.0
    :unit_code: /24
  :classification: misc
  :property: mass fraction
  :metric: false
  :special: false
  :arbitrary: false
- :names: Smoot
  :primary_code: '[smoot]'
  :secondary_code: '[SMOOT]'
  :scale:
    :value: 67.0
    :unit_code: '[in_i]'
  :classification: misc
  :property: length
  :metric: false
  :special: false
  :arbitrary: false
- :names: bit
  :symbol: bit<sub>s</sub>
  :primary_code: bit_s
  :secondary_code: BIT_S
  :scale:
    :function_code: ld
    :value: 1.0
    :unit_code: '1'
  :classification: infotech
  :property: amount of information
  :metric: false
  :special: true
  :arbitrary: false
- :names: bit
  :symbol: bit
  :primary_code: bit
  :secondary_code: BIT
  :scale:
    :value: 1.0
    :unit_code: '1'
  :classification: infotech
  :property: amount of information
  :metric: true
  :special: false
  :arbitrary: false
- :names: byte
  :symbol: B
  :primary_code: By
  :secondary_code: BY
  :scale:
    :value: 8.0
    :unit_code: bit
  :classification: infotech
  :property: amount of information
  :metric: true
  :special: false
  :arbitrary: false
- :names: baud
  :symbol: Bd
  :primary_code: Bd
  :secondary_code: Bd
  :scale:
    :value: 1.0
    :unit_code: /s
  :classification: infotech
  :property: signal transmission rate
  :metric: true
  :special: false
  :arbitrary: false