diff --git a/docs/pipelines.md b/docs/pipelines.md
index eb15db42..71481d4b 100644
--- a/docs/pipelines.md
+++ b/docs/pipelines.md
@@ -65,13 +65,14 @@ See [Operations](operations.md) for a full list of operations that can be applie
 After all transformation operations are applied, a pipeline can define a sink to which all messages are sent. There are
 four sink types in KSML:
 
-| Sink type | Description                                                                                                                                                                                                          |
-|-----------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
-| `as`      | Allows the pipeline result to be saved under an internal name, which can later be referenced. Pipelines defined after this point may refer to this name in their `from` statement.                                   |
-| `branch`  | This statement allows the pipeline to be split up in several branches. Each branch filters messages with an `if` statement. Messages will be processed only by the first branch of which the `if` statement is true. |
-| `forEach` | Sends every message to a function, without expecting any return type. Because there is no return type, the pipeline always stops after this statement.                                                               |
-| `print`   | Prints out every message according to a given output specification.                                                                                                                                                  |
-| `to`      | Sends all output messages to a specific target. This target can be a pre-defined `stream`, `table` or `globalTable`, an inline-defined topic, or a special function called a `topicNameExtractor`.                   |
+| Sink type              | Description                                                                                                                                                                                                          |
+|------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| `as`                   | Allows the pipeline result to be saved under an internal name, which can later be referenced. Pipelines defined after this point may refer to this name in their `from` statement.                                   |
+| `branch`               | This statement allows the pipeline to be split up in several branches. Each branch filters messages with an `if` statement. Messages will be processed only by the first branch of which the `if` statement is true. |
+| `forEach`              | Sends every message to a function, without expecting any return type. Because there is no return type, the pipeline always stops after this statement.                                                               |
+| `print`                | Prints out every message according to a given output specification.                                                                                                                                                  |
+| `to`                   | Sends all output messages to a specific target. This target can be a pre-defined `stream`, `table` or `globalTable`, or an inline-defined topic.                                                                     |
+| `toTopicNameExtractor` | Messages are passed onto a user function, which returns the name of the topic that message needs to be sent to.                                                                                                      |
 
 For more information, see the respective documentation on pipeline definitions in
 the [definitions section of the KSML language spec](ksml-language-spec.html#definitions/PipelineDefinition).