*machine input+*right+*mates+*referred to by Search Toggle navigation activity Toggle Dropdown history discuss follow editors rules Toggle Dropdown common by group by name recent edit Toggle Dropdown content name type refresh children mates references out references in +*children Cards formed by "mating" *machine input+*right+*mates+*referred to by with another card. eg: "*machine input+*right+*mates+*referred to by+mate".