SemanticWeb::Schema::PropertyValue - A property-value pair, e
version v23.0.0
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.
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:
_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:
_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:
_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:
_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:
_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.
For SemanticWeb::Schema::QuantitativeValue and SemanticWeb::Schema::MonetaryAmount, the recommended type for values is 'Number'.
For SemanticWeb::Schema::PropertyValue, it can be 'Text', 'Number', 'Boolean', or 'StructuredValue'.
Use values from 0123456789 (Unicode 'DIGIT ZERO' (U+0030) to 'DIGIT NINE' (U+0039)) rather than superficially similar Unicode symbols.
Use '.' (Unicode 'FULL STOP' (U+002E)) rather than ',' to indicate a decimal point. Avoid using these symbols as a readability separator.
A value should be one of the following types:
Bool
InstanceOf['SemanticWeb::Schema::StructuredValue']
_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::Enumeration']
InstanceOf['SemanticWeb::Schema::MeasurementTypeEnumeration']
InstanceOf['SemanticWeb::Schema::PropertyValue']
InstanceOf['SemanticWeb::Schema::QualitativeValue']
InstanceOf['SemanticWeb::Schema::QuantitativeValue']
_has_value_reference
A predicate for the "value_reference" attribute.
SemanticWeb::Schema::StructuredValue
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
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.
Robert Rothenberg <rrwo@cpan.org>
This software is Copyright (c) 2018-2023 by Robert Rothenberg.
This is free software, licensed under:
The Artistic License 2.0 (GPL Compatible)
To install SemanticWeb::Schema, copy and paste the appropriate command in to your terminal.
cpanm
cpanm SemanticWeb::Schema
CPAN shell
perl -MCPAN -e shell install SemanticWeb::Schema
For more information on module installation, please visit the detailed CPAN module installation guide.