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@@ -24,6 +24,13 @@ Kafka source custom properties. if properties belongs to Kafka Consumer Config,
| [format].config | Map | No | (none) | Data format properties. Please refer to [Format Options](../formats) for details. |
| kafka.config | Map | No | (none) | Kafka consumer properties. Please refer to [Kafka Consumer Config](https://kafka.apache.org/documentation/#consumerconfigs) for details. |
+## Internal Fields
+
+| Name | Type | Description |
+|-------------|---------------------|-------------------------------------|
+| __timestamp | Long | The timestamp of this kafka record. |
+| __headers | Map[String, String] | The headers of this kafka record. |
+
## Example
This example read data of kafka topic `SESSION-RECORD` and print to console.