AWS Data Pipeline is no longer available to new customers. Existing customers of AWS Data Pipeline can continue to use the service as normal. [Learn more](https://aws.amazon.com/blogs/big-data/migrate-workloads-from-aws-data-pipeline/)

# Special Characters
<a name="dp-pipeline-characters"></a>

AWS Data Pipeline uses certain characters that have a special meaning in pipeline definitions, as shown in the following table. 


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| Special Character | Description | Examples | 
| --- | --- | --- | 
| @ | Runtime field. This character is a field name prefix for a field that is only available when a pipeline runs. | @actualStartTime<br />@failureReason<br />@resourceStatus | 
| \# | Expression. Expressions are delimited by: "\#{" and "}" and the contents of the braces are evaluated by AWS Data Pipeline. For more information, see [Expressions](dp-pipeline-expressions.md). | \#{format(myDateTime,'YYYY-MM-dd hh:mm:ss')}<br />s3://amzn-s3-demo-bucket/\#{id}.csv | 
| \* | Encrypted field. This character is a field name prefix to indicate that AWS Data Pipeline should encrypt the contents of this field in transit between the console or CLI and the AWS Data Pipeline service. | \*password |