# ObjectIdentifier
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Object Identifier is unique value to identify objects.

## Contents
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 ** Key **   <a name="AmazonS3-Type-ObjectIdentifier-Key"></a>
Key name of the object.  
Replacement must be made for object keys containing special characters (such as carriage returns) when using XML requests. For more information, see [ XML related object key constraints](https://docs.aws.amazon.com/AmazonS3/latest/userguide/object-keys.html#object-key-xml-related-constraints).
Type: String  
Length Constraints: Minimum length of 1.  
Required: Yes

 ** ETag **   <a name="AmazonS3-Type-ObjectIdentifier-ETag"></a>
An entity tag (ETag) is an identifier assigned by a web server to a specific version of a resource found at a URL. This header field makes the request method conditional on `ETags`.   
Entity tags (ETags) for S3 Express One Zone are random alphanumeric strings unique to the object. 
Type: String  
Required: No

 ** LastModifiedTime **   <a name="AmazonS3-Type-ObjectIdentifier-LastModifiedTime"></a>
If present, the objects are deleted only if its modification times matches the provided `Timestamp`.   
This functionality is only supported for directory buckets.
Type: Timestamp  
Required: No

 ** Size **   <a name="AmazonS3-Type-ObjectIdentifier-Size"></a>
If present, the objects are deleted only if its size matches the provided size in bytes.   
This functionality is only supported for directory buckets.
Type: Long  
Required: No

 ** VersionId **   <a name="AmazonS3-Type-ObjectIdentifier-VersionId"></a>
Version ID for the specific version of the object to delete.  
This functionality is not supported for directory buckets.
Type: String  
Required: No

## 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\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/s3-2006-03-01/ObjectIdentifier) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/s3-2006-03-01/ObjectIdentifier) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/s3-2006-03-01/ObjectIdentifier)