An expanded term definition, is a term definition where the value is a JSON
object containing one or more keyword properties to define the associated
absolute IRI, if this is a reverse property, the type associated with string
values, and a container mapping.
An expanded term definition, is a term definition where the value is a JSON object containing one or more keyword properties to define the associated absolute IRI, if this is a reverse property, the type associated with string values, and a container mapping.
https://json-ld.org/spec/latest/json-ld/#dfn-expanded-term-definitions