# DescribeEventCategories
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Displays a list of categories for all event source types, or, if specified, for a specified source type. 

## Request Parameters
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 For information about the parameters that are common to all actions, see [Common Parameters](CommonParameters.md).

 **Filters.Filter.N**   
This parameter is not currently supported.  
Type: Array of [Filter](API_Filter.md) objects  
Required: No

 ** SourceType **   
The type of source that is generating the events.  
Valid values: `db-instance`, `db-parameter-group`, `db-security-group`   
Type: String  
Required: No

## Response Elements
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The following element is returned by the service.

 **EventCategoriesMapList.EventCategoriesMap.N**   
A list of event category maps.  
Type: Array of [EventCategoriesMap](API_EventCategoriesMap.md) objects

## Errors
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For information about the errors that are common to all actions, see [Common Error Types](CommonErrors.md).

## See Also
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For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS Command Line Interface V2](https://docs.aws.amazon.com/goto/cli2/docdb-2014-10-31/DescribeEventCategories) 
+  [AWS SDK for .NET V4](https://docs.aws.amazon.com/goto/DotNetSDKV4/docdb-2014-10-31/DescribeEventCategories) 
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/docdb-2014-10-31/DescribeEventCategories) 
+  [AWS SDK for Go v2](https://docs.aws.amazon.com/goto/SdkForGoV2/docdb-2014-10-31/DescribeEventCategories) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/docdb-2014-10-31/DescribeEventCategories) 
+  [AWS SDK for JavaScript V3](https://docs.aws.amazon.com/goto/SdkForJavaScriptV3/docdb-2014-10-31/DescribeEventCategories) 
+  [AWS SDK for Kotlin](https://docs.aws.amazon.com/goto/SdkForKotlin/docdb-2014-10-31/DescribeEventCategories) 
+  [AWS SDK for PHP V3](https://docs.aws.amazon.com/goto/SdkForPHPV3/docdb-2014-10-31/DescribeEventCategories) 
+  [AWS SDK for Python](https://docs.aws.amazon.com/goto/boto3/docdb-2014-10-31/DescribeEventCategories) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/docdb-2014-10-31/DescribeEventCategories)