readable skin+*machine input+*mates+*children 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 readable skin+*machine input+*mates+*children+*children Cards formed by "mating" readable skin+*machine input+*mates+*children with another card. eg: "readable skin+*machine input+*mates+*children+mate".