# PidMapRule
<a name="API_PidMapRule"></a>

A rule that selects elementary streams and specifies the action to apply to them. For more information, see [Rules](https://docs.aws.amazon.com/mediaconnect/latest/ug/pid-remapping-writing-rules.html) in the * AWS Elemental MediaConnect User Guide*.

## Contents
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 ** action **   <a name="mediaconnect-Type-PidMapRule-action"></a>
The action to apply to the elementary streams that match this rule. For more information, see [Rule actions](https://docs.aws.amazon.com/mediaconnect/latest/ug/pid-remapping-writing-rules.html#pid-remapping-actions) in the * AWS Elemental MediaConnect User Guide*.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 256.  
Required: Yes

 ** matchExpression **   <a name="mediaconnect-Type-PidMapRule-matchExpression"></a>
An expression that selects the elementary streams that this rule applies to. For more information, see [Rule match expressions](https://docs.aws.amazon.com/mediaconnect/latest/ug/pid-remapping-writing-rules.html#pid-remapping-match-expressions) in the * AWS Elemental MediaConnect User Guide*.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 256.  
Required: Yes

## 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 SDK for C\+\+](https://docs.aws.amazon.com/goto/SdkForCpp/mediaconnect-2018-11-14/PidMapRule) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/mediaconnect-2018-11-14/PidMapRule) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/mediaconnect-2018-11-14/PidMapRule)