SchemaObservation class

Instances of the class SchemaObservation are used to specify observations about an entity at a particular time. The principal properties of an SchemaObservation are SchemaobservationAbout, SchemameasuredProperty, SchemastatType, Schemavalue and [observationDate and SchemameasuredProperty. Some but not all Observations represent a SchemaQuantitativeValue. Quantitative observations can be about a SchemaStatisticalVariable, which is an abstract specification about which we can make observations that are grounded at a particular location and time. Observations can also encode a subset of simple RDF-like statements (its observationAbout, a StatisticalVariable, defining the measuredPoperty; its observationAbout property indicating the entity the statement is about, and Schemavalue )

In the context of a quantitative knowledge graph, typical properties could include SchemameasuredProperty, SchemaobservationAbout, SchemaobservationDate, Schemavalue, SchemaunitCode, SchemaunitText, SchemameasurementMethod. See https://schema.org/Observation

Constructors

SchemaObservation({SchemaQuantitativeValue? marginOfError, SchemaProperty? measuredProperty, SchemaStatisticalVariable? measurementDenominator, dynamic measurementMethod, SchemaEnumeration? measurementQualifier, dynamic measurementTechnique, dynamic observationAbout, String? observationDate, String? observationPeriod, dynamic variableMeasured, SchemaPropertyValue? additionalProperty, int? maxValue, int? minValue, String? unitCode, String? unitText, dynamic value, dynamic valueReference, String? additionalType, String? alternateName, dynamic description, String? disambiguatingDescription, dynamic identifier, dynamic image, dynamic mainEntityOfPage, String? name, SchemaAction? potentialAction, String? sameAs, dynamic subjectOf, String? url})

Create a new instance of SchemaObservation

Properties

additionalProperty ↔ SchemaPropertyValue?

//schema.org/gtin13, ...) will typically expect such data to be provided using those properties, rather than using the generic property/value mechanism.

getter/setter pair

additionalType ↔ String?

//schema.org/docs/styleguide.html">style guide.

getter/setter pair

alternateName ↔ String?

An alias for the item.

getter/setter pair

description ↔ dynamic

A description of the item.

getter/setter pair

disambiguatingDescription ↔ String?

A sub property of description. A short description of the item used to disambiguate from other, similar items. Information from other properties (in particular, name) may be necessary for the description to be useful for disambiguation.

getter/setter pair

hashCode → int

The hash code for this object.

no setter, inherited

identifier ↔ dynamic

The identifier property represents any kind of identifier for any kind of SchemaThing, such as ISBNs, GTIN codes, UUIDs etc. Schema.org provides dedicated properties for representing many of these, either as textual strings or as URL (URI) links. See background notes for more details.

getter/setter pair

image ↔ dynamic

An image of the item. This can be a SchemaURL or a fully described SchemaImageObject.

getter/setter pair

mainEntityOfPage ↔ dynamic

Indicates a page (or other CreativeWork) for which this thing is the main entity being described. See background notes for details.

getter/setter pair

marginOfError ↔ SchemaQuantitativeValue?

A SchemamarginOfError for an SchemaObservation.

getter/setter pair

maxValue ↔ int?

The upper value of some characteristic or property.

getter/setter pair

measuredProperty ↔ SchemaProperty?

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getter/setter pair

measurementDenominator ↔ SchemaStatisticalVariable?

Identifies the denominator variable when an observation represents a ratio or percentage.

getter/setter pair

measurementMethod ↔ dynamic

A subproperty of SchemameasurementTechnique that can be used for specifying specific methods, in particular via SchemaMeasurementMethodEnum.

getter/setter pair

measurementQualifier ↔ SchemaEnumeration?

Provides additional qualification to an observation. For example, a GDP observation measures the Nominal value.

getter/setter pair

measurementTechnique ↔ dynamic

"mass spectrometry" or "nmr spectroscopy" or "colorimetry" or "immunofluorescence". If the SchemavariableMeasured is "depression rating", the SchemameasurementTechnique could be "Zung Scale" or "HAM-D" or "Beck Depression Inventory".

getter/setter pair

minValue ↔ int?

The lower value of some characteristic or property.

getter/setter pair

name ↔ String?

The name of the item.

getter/setter pair

observationAbout ↔ dynamic

The SchemaobservationAbout property identifies an entity, often a SchemaPlace, associated with an SchemaObservation.

getter/setter pair

observationDate ↔ String?

The observationDate of an SchemaObservation.

getter/setter pair

observationPeriod ↔ String?

The length of time an Observation took place over. The format follows P[0-9]*[Y|M|D|h|m|s]. For example, P1Y is Period 1 Year, P3M is Period 3 Months, P3h is Period 3 hours.

getter/setter pair

potentialAction ↔ SchemaAction?

Indicates a potential Action, which describes an idealized action in which this thing would play an 'object' role.

getter/setter pair

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

sameAs ↔ String?

URL of a reference Web page that unambiguously indicates the item's identity. E.g. the URL of the item's Wikipedia page, Wikidata entry, or official website.

getter/setter pair

subjectOf ↔ dynamic

A CreativeWork or Event about this Thing.

getter/setter pair

unitCode ↔ String?

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.

getter/setter pair

unitText ↔ String?

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

getter/setter pair

url ↔ String?

URL of the item.

getter/setter pair

value ↔ dynamic

The value of a SchemaQuantitativeValue (including SchemaObservation) or property value node.\n\n* For SchemaQuantitativeValue and SchemaMonetaryAmount, the recommended type for values is 'Number'.\n* For SchemaPropertyValue, it can be 'Text', 'Number', 'Boolean', or 'StructuredValue'.\n* Use values from 0123456789 (Unicode 'DIGIT ZERO' (U+0030) to 'DIGIT NINE' (U+0039)) rather than superficially similar Unicode symbols.\n* Use '.' (Unicode 'FULL STOP' (U+002E)) rather than ',' to indicate a decimal point. Avoid using these symbols as a readability separator.

getter/setter pair

valueReference ↔ dynamic

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

getter/setter pair

variableMeasured ↔ dynamic

The variableMeasured property can indicate (repeated as necessary) the variables that are measured in some dataset, either described as text or as pairs of identifier and description using PropertyValue, or more explicitly as a SchemaStatisticalVariable.

getter/setter pair

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toJsonLd() → Map<String, dynamic>

Serialize SchemaObservation to JSON-LD

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited