This concept enumeration represents a value that can be applied to the relationship.typeId field. This is used to identify the concept model attribute that determines the type of relationship between two concepts.
The concept model attribute values that can be applied depend on the concept model domain of the concept in the relationship.sourceId of the defining relationship. See 4.13 Get Concept Model Rules for information on terminology services used to determine the concept model domain and the attributes that can be applied to concept in a specific domain. For further details related to the concept model see the Machine Readable Concept Model specification and guide.