Json is a perl module for manipulating data stored in the format of the same name. javascript object notation (json) is a simple data serialization format (defined in rfc 4627) that serves as an alternative to xml.

the primary purpose of this module is to select an appropriate backend json implementation. it prefers either json::xs (see libjson-xs-perl) or json::pp (see libjson-pp-perl), but will fall back on a backport implementation if neither are available.