http://qudt.org/schema/qudt/IntervalScale
<p>The interval type allows for the degree of difference between items, but not the ratio between them.
Examples include temperature with the Celsius scale, which has two defined points
(the freezing and boiling point of water at specific conditions) and then separated into 100 intervals,
date when measured from an arbitrary epoch (such as AD), percentage such as a percentage return on a stock,
location in Cartesian coordinates, and direction measured in degrees from true or magnetic north.
</p>
<p>Ratios are not meaningful since 20 °C cannot be said to be "twice as hot" as 10 °C, nor can multiplication/division be carried out between any two dates directly.
However, ratios of differences can be expressed; for example, one difference can be twice another.
Interval type variables are sometimes also called "scaled variables", but the formal mathematical term is an affine space (in this case an affine line).
</p>
<p>Characteristics: median, percentile & Monotonic increasing (order (<) & totally ordered set.</p>
Instances of qudt:IntervalScale can have the following properties:
| PROPERTY | TYPE | DESCRIPTION | RANGE |
|---|
By the associated SHACL property shapes, instances of qudt:IntervalScale can have the following properties:
| PROPERTY | PROPERTY TYPE | DESCRIPTION | MIN | MAX | VALUE TYPE | OTHER CONSTRAINTS | GLOBAL RANGE |
|---|---|---|---|---|---|---|---|
| qudt:Scale | |||||||
| qudt:dataStructure | rdf:Property | 0 | 1 | xsd:string | -- | ||
| qudt:permissibleMaths | rdf:Property | 0 | * | qudt:MathsFunctionType | -- | ||
| qudt:permissibleTransformation | rdf:Property | 0 | * | qudt:TransformType | -- | ||
| qudt:scaleType | rdf:Property | 0 | 1 | qudt:ScaleType | -- | ||
| qudt:Concept | |||||||
| dcterms:description | rdf:Property | 0 | * | -- | |||
| dcterms:isReplacedBy | rdf:Property | 0 | 1 | -- | |||
dtype:code |
-- | 0 | * | -- | |||
| qudt:abbreviation | rdf:Property | <p>An abbreviation for a unit is a short ASCII string that is used in place of the full name for the unit in contexts where non-ASCII characters would be problematic, or where using the abbreviation will enhance readability. When a power of abase unit needs to be expressed, such as squares this can be done using abbreviations rather than symbols. For example, <em>sq ft</em> means <em>square foot</em>, and <em>cu ft</em> means <em>cubic foot</em>. </p> | 0 | 1 | xsd:string | -- | |
| qudt:deprecated | rdf:Property | 0 | 1 | xsd:boolean | -- | ||
| qudt:deprecatedInVersion | rdf:Property | Version number of the first QUDT release in which an entity was deprecated. | 0 | 1 | xsd:string |
sh:pattern
^\d+\.\d+\.\d+$
|
-- |
| qudt:exactMatch | owl:ObjectProperty | 0 | * | qudt:Concept | -- | ||
| qudt:guidance | rdf:Property | 0 | * | rdf:HTML | -- | ||
| qudt:hasRule | rdf:Property | 0 | * | qudt:Rule | -- | ||
| qudt:id | rdf:Property | <p>The "qudt:id" is an identifier string that uniquely identifies a QUDT concept. The identifier is constructed using a prefix. For example, units are coded using the pattern: "UCCCENNNN", where "CCC" is a numeric code or a category and "NNNN" is a digit string for a member element of that category. </p> <p>For scaled units there may be an addition field that has the format "QNN" where "NN" is a digit string representing an exponent power, and "Q" is a qualifier that indicates with the code "P" that the power is a positive decimal exponent, or the code "N" for a negative decimal exponent, or the code "B" for binary positive exponents. </p> | 0 | 1 | xsd:string | -- | |
| qudt:plainTextDescription | rdf:Property | A plain text description is used to provide a description with only simple ASCII characters for cases where LaTeX , HTML or other markup would not be appropriate. | 0 | * | -- | ||
rdf:type |
-- | 1 | * | -- | |||
| qudt:Verifiable | |||||||
| qudt:dbpediaMatch | rdf:Property | 0 | * | xsd:anyURI | -- | ||
| qudt:informativeReference | rdf:Property | Provides a way to reference a source that provided useful but non-normative information. | 0 | * |
sh:or
( xsd:anyURI | qudt:Citation )
|
-- | |
| qudt:isoNormativeReference | rdf:Property | Provides a way to reference the ISO unit definition. | 0 | * | xsd:anyURI | -- | |
| qudt:normativeReference | rdf:Property | Provides a way to reference information that is an authoritative source providing a standard definition | 0 | * | xsd:anyURI | -- | |
| qudt:wikidataMatch | rdf:Property | This property relates a QUDT concept to a Wikidata item. The Wikidata item is identified by the Wikidata URI, which is of the form `https://www.wikidata.org/wiki/Q{number}`. | 0 | 1 | -- | ||
@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix qudt: <http://qudt.org/schema/qudt/> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix sh: <http://www.w3.org/ns/shacl#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
qudt:IntervalScale a rdfs:Class,
sh:NodeShape ;
rdfs:label "Interval scale" ;
dcterms:description """
<p>The interval type allows for the degree of difference between items, but not the ratio between them.
Examples include temperature with the Celsius scale, which has two defined points
(the freezing and boiling point of water at specific conditions) and then separated into 100 intervals,
date when measured from an arbitrary epoch (such as AD), percentage such as a percentage return on a stock,
location in Cartesian coordinates, and direction measured in degrees from true or magnetic north.
</p>
<p>Ratios are not meaningful since 20 °C cannot be said to be "twice as hot" as 10 °C, nor can multiplication/division be carried out between any two dates directly.
However, ratios of differences can be expressed; for example, one difference can be twice another.
Interval type variables are sometimes also called "scaled variables", but the formal mathematical term is an affine space (in this case an affine line).
</p>
<p>Characteristics: median, percentile & Monotonic increasing (order (<) & totally ordered set.</p>
"""^^rdf:HTML ;
qudt:informativeReference "https://en.wikipedia.org/wiki/Level_of_measurement"^^xsd:anyURI ;
rdfs:isDefinedBy <http://qudt.org/3.5.2/schema/shacl/qudt> ;
rdfs:seeAlso qudt:NominalScale,
qudt:OrdinalScale,
qudt:RatioScale ;
rdfs:subClassOf qudt:Scale .