Mappings of GO have been made to other many other classification systems; a full list is available on the Mappings to GO page. This page describes the format of these files.
The source of the external file is given in the line beginning
!Uses:http://www.tigr.org/docs/tigr-scripts/egad_scripts/role_reports.spl, 15 aug 2000.
The line syntax for mappings is:
external database:term identifier (id/name) > GO:GO term name ; GO:id