Subclass of:

• crm:E1 CRM Entity
• sdh:C5 Abstract Region

Superclass of:

• crm-sup:C11 Numeric dimension
• crm-sup:C13 Length
• crm-sup:C15 Weight
• crm-sup:C17 Area
• crm-sup:C20 Volume
• crm-sup:C21 Monetary amount
• crm-sup:C1 Duration
• crmdig:D9 Data Object

Scope note:

This class comprises quantifiable properties that can be measured by some calibrated means and can be approximated by values, i.e. points or regions in a mathematical or conceptual space, such as natural or real numbers, RGB values etc.

An instance of E54 Dimension represents the true quantity, independent from its numerical approximation, e.g. in inches or in cm. The properties of the class E54 Dimension allow for expressing the numerical approximation of the values of an instance of E54 Dimension. If the true values belong to a non-discrete space, such as spatial distances, it is recommended to record them as approximations by intervals or regions of indeterminacy enclosing the assumed true values. For instance, a length of 5 cm may be recorded as 4.5-5.5 cm, according to the precision of the respective observation. Note, that interoperability of values described in different units depends critically on the representation as value regions.

Numerical approximations in archaic instances of E58 Measurement Unit used in historical records should be preserved. Equivalents corresponding to current knowledge should be recorded as additional instances of E54 Dimension as appropriate.

Examples:

• currency: £26.00
• length: 3.9-4.1 cm 
• diameter 26 mm
• weight 150 lbs
• density: 0.85 gm/cc
• luminescence: 56 ISO lumens
• tin content: 0.46 %
• taille au garot: 5 hands
• calibrated C14 date: 2460-2720 years, etc

In First Order Logic:

• E54(x) ⇒ E1(x)
• E54(x) ⇒ C5(x)

Outgoing properties:

• crm:P90 has value (0,n:1,1) → crm:E60 Number
• crm:P91 has unit (is unit of) (0,n:1,1) → crm:E58 Measurement Unit
• crm-sup:P25 has dimension type (is dimension type of) (0,n:0,1) → crm-sup:C27 Dimension Type

Incoming properties:

• crm:E16 Measurement → crm:P40 observed dimension (was observed in) (0,n:1,n)
• crm:E70 Thing → crm:P43 has dimension (is dimension of) (1,1:0,n)
• crm:E52 Time-Span → crm:P83 had at least duration (was minimum duration of) (1,1:1,1)
• crm:E52 Time-Span → crm:P84 had at most duration (was maximum duration of) (1,1:1,1)
• crmsci:S6 Data Evaluation → crmsci:O10 assigned dimension (dimension was assigned by)
• crmsci:S15 Observable Entity → crmsci:O12 has dimension (is dimension of)
• frbroo:F3 Manifestation Product Type → frbroo:CLP43 should have dimension (should be dimension of) (1,1:1,n)
• sdh:C28 Quantifiable Quality → sdh:P35 has quality dimension (is dimension of) (1,n:1,1)
• sdh-int:C16 Quantifiable Component → sdh-int:P30 has component dimension (is component dimension of) (1,n:1,1)