ConstraintNode

Status: Pending

Breadcrumb: Thing > Intangible > ConstraintNode

The ConstraintNode type is provided to support usecases in which a node in a structured data graph is described with properties which appear to describe a single entity, but are being used in a situation where they serve a more abstract purpose. A ConstraintNode can be described using constraintProperty and numConstraints. These constraint properties can serve a variety of purposes, and their values may sometimes be understood to indicate sets of possible values rather than single, exact and specific values.

Parent types

Intangible

Properties

Properties for ConstraintNode

Property	Expected type	Defined on	Description
constraintProperty	Property, URL	ConstraintNode	Indicates a property used as a constraint. For example, in the definition of a StatisticalVariable. The value is a property, either from within Schema.org or from other compatible (e.g. RDF) systems such as DataCommons.org or Wikidata.org.
numConstraints	Integer	ConstraintNode	Indicates the number of constraints property values defined for a particular ConstraintNode such as StatisticalVariable. This helps applications understand if they have access to a sufficiently complete description of a StatisticalVariable or other construct that is defined using properties on template-style nodes.

Inherited properties

Property	Expected type	Inherited from	Description
additionalType	Text, URL	Thing	An additional type for the item, typically used for adding more specific types from external vocabularies in microdata syntax. This is a relationship between something and a class that the thing is in. Typically the value is a URI-identified RDF class, and in this case corresponds to the use of rdf:type in RDF. Text values can be used sparingly, for cases where useful information can be added without their being an appropriate schema to reference. In the case of text values, the class label should follow the schema.org style guide.
alternateName	Text	Thing	An alias for the item.
description	Text, TextObject	Thing	A description of the item.
disambiguatingDescription	Text	Thing	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.
identifier	PropertyValue, Text, URL	Thing	The identifier property represents any kind of identifier for any kind of Thing, 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.
image	ImageObject, URL	Thing	An image of the item. This can be a URL or a fully described ImageObject.
mainEntityOfPage	CreativeWork, URL	Thing	Indicates a page (or other CreativeWork) for which this thing is the main entity being described. See background notes for details.
name	Text	Thing	The name of the item.
owner	Organization, Person	Thing	A person or organization who owns this Thing.
potentialAction	Action	Thing	Indicates a potential Action, which describes an idealized action in which this thing would play an 'object' role.
sameAs	URL	Thing	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.
subjectOf	CreativeWork, Event	Thing	A CreativeWork or Event about this Thing.
url	URL	Thing	URL of the item.

Sub-types

StatisticalVariable

Example

{
  "@context": "https://schema.org",
  "@type": "ConstraintNode",
  "name": "Example Name",
  "description": "A short description.",
  "url": "/example",
  "constraintProperty": "Example value",
  "numConstraints": "Example value"
}