Definition: The '2009071701_2.0.2.31' is a digital signature file for the Amazon Web Services (AWS) account created in 2009 that was used to sign a document on 17 July, 2017. It contains metadata about the AWS account and its services. The '2.0.2.31' part refers to an update to the version of the SignatureManager library for Amazon Web Services (AWS), which is available at https://github.com/aws-sig/aws-sdk-java/releases/tag/v2.0.2.31. This update introduces new features and improvements to the signature manager. The file contains information about the AWS service, including its capabilities and usage, as well as metadata such as account ID, version number, and time stamp.