# E.7 Concept Enumerations for Relationship typeId

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. Exhibit E.7-1 shows the full range of values of values that can be applied to the *relationship*.*typeId* field.

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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. For further details related to the concept model see the [Machine Readable Concept Model ](https://app.gitbook.com/o/h8Z6qGxuQrzM9vbx5bPT/s/wLJPOzgAQsSAYr6nhvCl/)specification and guide.
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**Exhibit E.7-1: Subtype and Concept Model Attributes**

|                                                                                                                       |
| --------------------------------------------------------------------------------------------------------------------- |
| <p>/\* subtype relationship to a supertype concept \*/<br><a href="http://snomed.info/id/116680003">116680003</a></p> |

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