DDEX Data Dictionary , 2010-06-18

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Relator

An Entity that describes the nature of a relationship between one Entity and another.

Comments	Relator: Scope Relators are not normally used directly in DdexMessages: Relators are Dictionary linking entities (or "ontological entities") which are used to create all of the links which hold the Dictionary structure together. Example: a relationship such as "DealerPrice IsSubClassOf Price" results in a parent-child link being established between "Price" and "DealerPrice". Each Relator has a reverse or "reciprocal" Relator which is used to describe the same relationship from the reverse point of view. Example: "HasSubClass" is the reverse Relator of "IsSubClassOf", and so a statement such as "Price HasSubClass DealerPrice" has the same meaning as "DealerPrice IsSubClassOf Price". This enables the Dictionary to be navigated in all directions. Some Relators (e.g., "IsSameAs") are used for describing a relationship in both directions and so are their own reciprocals.
Relationships
Parents	Thing	An Entity in a Context playing a role other than that of Time or Place.
Instances	IsDomainWithRange	The Relator between a domain of a triple and a range of a triple.
	IsRangeWithDomain	The Relator between a range of a triple and a domain of a triple.

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