| Name | Description | Type | Package | Framework |
| AlphaComponent | A new component of Spark which may have unstable API's. | Class | org.apache.spark.annotation | Apache Spark |
| DeveloperApi | A lower-level, unstable API intended for developers. | Class | org.apache.spark.annotation | Apache Spark |
| Experimental | An experimental user-facing API. | Class | org.apache.spark.annotation | Apache Spark |
| Private | A class that is considered private to the internals of Spark -- there is a high-likelihood they will be changed in future versions of Spark. | Class | org.apache.spark.annotation | Apache Spark |