# FeatureMetadata
<a name="API_FeatureMetadata"></a>

The metadata for a feature. It can either be metadata that you specify, or metadata that is updated automatically.

## Contents
<a name="API_FeatureMetadata_Contents"></a>

 ** CreationTime **   <a name="sagemaker-Type-FeatureMetadata-CreationTime"></a>
A timestamp indicating when the feature was created.  
Type: Timestamp  
Required: No

 ** Description **   <a name="sagemaker-Type-FeatureMetadata-Description"></a>
An optional description that you specify to better describe the feature.  
Type: String  
Length Constraints: Minimum length of 0. Maximum length of 255.  
Pattern: `.*`   
Required: No

 ** FeatureGroupArn **   <a name="sagemaker-Type-FeatureMetadata-FeatureGroupArn"></a>
The Amazon Resource Number (ARN) of the feature group.  
Type: String  
Length Constraints: Minimum length of 0. Maximum length of 256.  
Pattern: `arn:aws[a-z\-]*:sagemaker:[a-z0-9\-]*:[0-9]{12}:feature-group/.*`   
Required: No

 ** FeatureGroupName **   <a name="sagemaker-Type-FeatureMetadata-FeatureGroupName"></a>
The name of the feature group containing the feature.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 64.  
Pattern: `[a-zA-Z0-9]([_-]*[a-zA-Z0-9]){0,63}`   
Required: No

 ** FeatureName **   <a name="sagemaker-Type-FeatureMetadata-FeatureName"></a>
The name of feature.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 64.  
Pattern: `[a-zA-Z0-9]([-_]*[a-zA-Z0-9]){0,63}`   
Required: No

 ** FeatureType **   <a name="sagemaker-Type-FeatureMetadata-FeatureType"></a>
The data type of the feature.  
Type: String  
Valid Values: `Integral | Fractional | String`   
Required: No

 ** LastModifiedTime **   <a name="sagemaker-Type-FeatureMetadata-LastModifiedTime"></a>
A timestamp indicating when the feature was last modified.  
Type: Timestamp  
Required: No

 ** Parameters **   <a name="sagemaker-Type-FeatureMetadata-Parameters"></a>
Optional key-value pairs that you specify to better describe the feature.  
Type: Array of [FeatureParameter](API_FeatureParameter.md) objects  
Array Members: Minimum number of 0 items. Maximum number of 25 items.  
Required: No

## See Also
<a name="API_FeatureMetadata_SeeAlso"></a>

For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/sagemaker-2017-07-24/FeatureMetadata) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/sagemaker-2017-07-24/FeatureMetadata) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/sagemaker-2017-07-24/FeatureMetadata)