/ 
SemanticWeb-Schema-v22.0.0
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/ SemanticWeb::Schema::PropertyValue

NAME

SemanticWeb::Schema::PropertyValue - A property-value pair, e

VERSION

version v22.0.0

DESCRIPTION

A property-value pair, e.g. representing a feature of a product or place. Use the 'name' property for the name of the property. If there is an additional human-readable version of the value, put that into the 'description' property. Always use specific schema.org properties when a) they exist and b) you can populate them. Using PropertyValue as a substitute will typically not trigger the same effect as using the original, specific property.

ATTRIBUTES

max_value

maxValue

The upper value of some characteristic or property.

A max_value should be one of the following types:

Num

_has_max_value

A predicate for the "max_value" attribute.

measurement_method

measurementMethod

A subproperty of [[measurementTechnique]] that can be used for specifying specific methods, in particular via SemanticWeb::Schema::MeasurementMethodEnum.

A measurement_method should be one of the following types:

InstanceOf['SemanticWeb::Schema::DefinedTerm']
InstanceOf['SemanticWeb::Schema::MeasurementMethodEnum']
Str

_has_measurement_method

A predicate for the "measurement_method" attribute.

measurement_technique

measurementTechnique

A technique, method or technology used in an SemanticWeb::Schema::Observation, SemanticWeb::Schema::StatisticalVariable or SemanticWeb::Schema::Dataset (or SemanticWeb::Schema::DataDownload, SemanticWeb::Schema::DataCatalog), corresponding to the method used for measuring the corresponding variable(s) (for datasets, described using [[variableMeasured]]; for SemanticWeb::Schema::Observation, a SemanticWeb::Schema::StatisticalVariable). Often but not necessarily each [[variableMeasured]] will have an explicit representation as (or mapping to) an property such as those defined in Schema.org, or other RDF vocabularies and "knowledge graphs". In that case the subproperty of [[variableMeasured]] called [[measuredProperty]] is applicable.

The [[measurementTechnique]] property helps when extra clarification is needed about how a [[measuredProperty]] was measured. This is oriented towards scientific and scholarly dataset publication but may have broader applicability; it is not intended as a full representation of measurement, but can often serve as a high level summary for dataset discovery.

For example, if [[variableMeasured]] is: molecule concentration, [[measurementTechnique]] could be: "mass spectrometry" or "nmr spectroscopy" or "colorimetry" or "immunofluorescence". If the [[variableMeasured]] is "depression rating", the [[measurementTechnique]] could be "Zung Scale" or "HAM-D" or "Beck Depression Inventory".

If there are several [[variableMeasured]] properties recorded for some given data object, use a SemanticWeb::Schema::PropertyValue for each [[variableMeasured]] and attach the corresponding [[measurementTechnique]]. The value can also be from an enumeration, organized as a SemanticWeb::Schema::MeasurementMetholdEnumeration.

A measurement_technique should be one of the following types:

InstanceOf['SemanticWeb::Schema::DefinedTerm']
InstanceOf['SemanticWeb::Schema::MeasurementMethodEnum']
Str

_has_measurement_technique

A predicate for the "measurement_technique" attribute.

min_value

minValue

The lower value of some characteristic or property.

A min_value should be one of the following types:

Num

_has_min_value

A predicate for the "min_value" attribute.

property_id

propertyID

A commonly used identifier for the characteristic represented by the property, e.g. a manufacturer or a standard code for a property. propertyID can be (1) a prefixed string, mainly meant to be used with standards for product properties; (2) a site-specific, non-prefixed string (e.g. the primary key of the property or the vendor-specific ID of the property), or (3) a URL indicating the type of the property, either pointing to an external vocabulary, or a Web resource that describes the property (e.g. a glossary entry). Standards bodies should promote a standard prefix for the identifiers of properties from their standards.

A property_id should be one of the following types:

Str

_has_property_id

A predicate for the "property_id" attribute.

unit_code

unitCode

The unit of measurement given using the UN/CEFACT Common Code (3 characters) or a URL. Other codes than the UN/CEFACT Common Code may be used with a prefix followed by a colon.

A unit_code should be one of the following types:

Str

_has_unit_code

A predicate for the "unit_code" attribute.

unit_text

unitText

A string or text indicating the unit of measurement. Useful if you cannot provide a standard unit code for unitCode.

A unit_text should be one of the following types:

Str

_has_unit_text

A predicate for the "unit_text" attribute.

value

The value of a SemanticWeb::Schema::QuantitativeValue (including SemanticWeb::Schema::Observation) or property value node.

A value should be one of the following types:

Bool
InstanceOf['SemanticWeb::Schema::StructuredValue']
Num
Str

_has_value

A predicate for the "value" attribute.

value_reference

valueReference

A secondary value that provides additional information on the original value, e.g. a reference temperature or a type of measurement.

A value_reference should be one of the following types:

InstanceOf['SemanticWeb::Schema::DefinedTerm']
InstanceOf['SemanticWeb::Schema::Enumeration']
InstanceOf['SemanticWeb::Schema::MeasurementTypeEnumeration']
InstanceOf['SemanticWeb::Schema::PropertyValue']
InstanceOf['SemanticWeb::Schema::QualitativeValue']
InstanceOf['SemanticWeb::Schema::QuantitativeValue']
InstanceOf['SemanticWeb::Schema::StructuredValue']
Str

_has_value_reference

A predicate for the "value_reference" attribute.

SEE ALSO

SemanticWeb::Schema::StructuredValue

SOURCE

The development version is on github at https://github.com/robrwo/SemanticWeb-Schema and may be cloned from git://github.com/robrwo/SemanticWeb-Schema.git

BUGS

Please report any bugs or feature requests on the bugtracker website https://github.com/robrwo/SemanticWeb-Schema/issues

When submitting a bug or request, please include a test-file or a patch to an existing test-file that illustrates the bug or desired feature.

AUTHOR

Robert Rothenberg <rrwo@cpan.org>

COPYRIGHT AND LICENSE

This software is Copyright (c) 2018-2023 by Robert Rothenberg.

This is free software, licensed under:

The Artistic License 2.0 (GPL Compatible)