## Changes Introduced in V9.2.0

The following describes the most significant changes which occurred in the AST library between versions V9.1.3 and V9.2.0:

1. - A new subclass of ChannelChannel called YamlChanYamlChan has been added. It allows AST objects to be read and written using YAML. Currently, the ASDF format developed by STSci (`https://asdf-standard.readthedocs.io`) is the only supported encoding.