# Data Types
<a name="API_Types"></a>

The Amazon Polly API contains several data types that various actions use. This section describes each data type in detail.

**Note**  
The order of each element in a data type structure is not guaranteed. Applications should not assume a particular order.

The following data types are supported:
+  [AudioEvent](API_AudioEvent.md) 
+  [CloseStreamEvent](API_CloseStreamEvent.md) 
+  [FlushStreamConfiguration](API_FlushStreamConfiguration.md) 
+  [Lexicon](API_Lexicon.md) 
+  [LexiconAttributes](API_LexiconAttributes.md) 
+  [LexiconDescription](API_LexiconDescription.md) 
+  [StartSpeechSynthesisStreamActionStream](API_StartSpeechSynthesisStreamActionStream.md) 
+  [StartSpeechSynthesisStreamEventStream](API_StartSpeechSynthesisStreamEventStream.md) 
+  [StreamClosedEvent](API_StreamClosedEvent.md) 
+  [SynthesisTask](API_SynthesisTask.md) 
+  [TextEvent](API_TextEvent.md) 
+  [ThrottlingReason](API_ThrottlingReason.md) 
+  [ValidationExceptionField](API_ValidationExceptionField.md) 
+  [Voice](API_Voice.md)