MINET Glossary of Measuring Man – 1 Entities, Quantities & Units

1 Entities, Quantities and units

MINET Glossary

Concept[1]

Definition

Notes

Entity phenomenon, body or material [ISO 3534-2:2006 1.2.11]
Substance

content

Unchanging essence of entity As opposed to accidence /form

Kantian tradition [Kohlhase & Kohlhase 2008]

Accidence

form

Appearance of entity As opposed to substance /contentKant
Dialectic pair Entity has both substance and accidence which can be differentiated but are inseparable Similar pairs are:

  • Essence/appearance [Hegel]
  • Matter/form [Aristoteles]
  • Content/form [Mathematical knowledge management]

[Kohlhase & Kohlhase 2008]

Essence Totality of traits that constitute meaning of  entity Kant
Characteristic distinguishing feature of an item or process ( entity) related to a requirement [ISO 3534-2:2006 1.1.2]
Platonic entity Substance perspective of content entity [Kohlhase & Kohlhase 2008]
Conceptualised entity [Kohlhase & Kohlhase 2008]
Construct Theoretical concept of an entity [MINET Think Tank C]
Presented entity Accidence perspective of form entity [Kohlhase & Kohlhase 2008]
Quality abstract, single sensed aspect of object or event (entity) – e.g. ‘smell’Finkelstein [1982] definition by formulation of theoretical concept or construct of ‘quality’ precedes development of measurement procedures and scales
indicant MINET Example: Eye blinking indicant could be a measure of tiredness with one type of uncertainty
Interpretation MINET: Definition of an entity MINET Note: Important that an entity and its characteristic can be defined independent of measurement. Interpretation as distinct from measurement.
Quantity

property of a phenomenon, body, or substance, (entity) where the property has a magnitude that can be expressed as a number and a reference (1.1 VIM)
System of quantities set of quantities together with a set of non-contradictory equations relating those quantities (1.3 VIM) Ordinal quantities, such as Rockwell C hardness, are usually not considered to be part of a system of quantities because they are related to other quantities through empirical relations only. (VIM)
Measurement unit

unit of measurement

unit

real scalar quantity, defined and adopted by convention, with which any other quantity of same kind can be compared to express ratio of the two quantities as a number. (1.9 VIM)
Quantity value value of a quantity number and reference together expressing magnitude of a quantity (1.19 VIM)
Ordinal quantity

quantity, defined by a conventional measurement procedure, for which a total ordering relation can be established, according to magnitude, with other quantities of the same kind, but for which no algebraic operations among those quantities exist (1.26 VIM) NOTE 1 Ordinal quantities can enter into empirical relations only and have neither measurement units nor quantity dimensions. Differences and ratios of ordinal quantities have no physical meaning.

NOTE 2 Ordinal quantities are arranged according to ordinal quantity-value scales (see 1.28 VIM)

EXAMPLE 4 Subjective level of abdominal pain on a scale from zero to five. (VIM)

Nominal property

property of a phenomenon, body, or material, (entity) where the property has no magnitude (1.30 VIM) EXAMPLE 2 Colour of a paint sample.

EXAMPLE 3 Colour of a spot test in chemistry.

(VIM)


[1] Numbering of concepts is based on VIM where available

MINET Glossary

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