Compile MPGL to mdoc. More information: https://developer.apple.com/library/archive/documentation/DeveloperTools/Conceptual/HeaderDoc/mpgl/mpgl.html.
xml2man {{path/to/command_file.mxml}}
xml2man {{path/to/service_file.mxml}} {{path/to/service_file.7}}
xml2man -f {{path/to/function_file.mxml}} {{path/to/function_file.3}}