# Span
<a name="API_Span"></a>

 A span from a trace that has been ingested by the X-Ray service. A span represents a unit of work or an operation performed by a service. 

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

 ** Document **   <a name="xray-Type-Span-Document"></a>
 The span document.  
Type: String  
Length Constraints: Maximum length of 204800.  
Required: No

 ** Id **   <a name="xray-Type-Span-Id"></a>
The span ID.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 16.  
Required: No

## See Also
<a name="API_Span_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/xray-2016-04-12/Span) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/xray-2016-04-12/Span) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/xray-2016-04-12/Span)