# IssueKey

Stores information about a project where the issue belongs or previously belonged. This entity appears as part of the ProjectActivityItem object.
## Attributes

This table describes attributes of the `IssueKey` entity.

* To receive an attribute in the response from the server, specify it explicitly in the `fields` request parameter.

* To update an attribute, provide it in the body of a POST request.

|  Field  |  Type  |  Description  |
| --- | --- | --- |
|  id  |  String  |  The ID of the IssueKey. `Read-only`.  |
|  project  |  [Project](api-entity-Project.html)  |  The project where the issue belongs or previously belonged. `Read-only`.  |
|  numberInProject  |  Long  |  The sequential number of the issue in a project. `Read-only`.  |