ScheduledJob.Key

Read and write.Type: String.
Application ID. For scheduled jobs, the key does not have to be unique. The key is used when jobs are launched based on a scheduled job. In this case, the system checks the key's uniqueness for all active jobs which are connected with the scheduled job and have the same metadata object. In other words, the uniqueness of the key is being checked within the scheduled job's metadata object. If this condition is not met, the job is not launched. Only the administrator has reading and writing access.
Server, thick client, external connection.The maximum length is 128 characters.

---