# PatchBaselineIdentity
<a name="API_PatchBaselineIdentity"></a>

Defines the basic information about a patch baseline.

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

 ** BaselineDescription **   <a name="systemsmanager-Type-PatchBaselineIdentity-BaselineDescription"></a>
The description of the patch baseline.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 1024.  
Required: No

 ** BaselineId **   <a name="systemsmanager-Type-PatchBaselineIdentity-BaselineId"></a>
The ID of the patch baseline.  
Type: String  
Length Constraints: Minimum length of 20. Maximum length of 128.  
Pattern: `^[a-zA-Z0-9_\-:/]{20,128}$`   
Required: No

 ** BaselineName **   <a name="systemsmanager-Type-PatchBaselineIdentity-BaselineName"></a>
The name of the patch baseline.  
Type: String  
Length Constraints: Minimum length of 3. Maximum length of 128.  
Pattern: `^[a-zA-Z0-9_\-.]{3,128}$`   
Required: No

 ** DefaultBaseline **   <a name="systemsmanager-Type-PatchBaselineIdentity-DefaultBaseline"></a>
Indicates whether this is the default baseline. AWS Systems Manager supports creating multiple default patch baselines. For example, you can create a default patch baseline for each operating system.  
Type: Boolean  
Required: No

 ** OperatingSystem **   <a name="systemsmanager-Type-PatchBaselineIdentity-OperatingSystem"></a>
Defines the operating system the patch baseline applies to. The default value is `WINDOWS`.   
Type: String  
Valid Values: `WINDOWS | AMAZON_LINUX | AMAZON_LINUX_2 | AMAZON_LINUX_2022 | UBUNTU | REDHAT_ENTERPRISE_LINUX | SUSE | CENTOS | ORACLE_LINUX | DEBIAN | MACOS | RASPBIAN | ROCKY_LINUX | ALMA_LINUX | AMAZON_LINUX_2023`   
Required: No

## See Also
<a name="API_PatchBaselineIdentity_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/ssm-2014-11-06/PatchBaselineIdentity) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/ssm-2014-11-06/PatchBaselineIdentity) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/ssm-2014-11-06/PatchBaselineIdentity)