The keyword refers to the source code archive of zlib version 1.2.13 , compressed using the tar.xz format. Released on October 13, 2022, version 1.2.13 was a critical update for the widely-used data compression library. What is zlib?
Once installed, you can integrate zlib into your applications. zlib provides a simple API that can be used to compress and decompress data. Documentation is available with the package and online. zlib1213tarxz