follower notification email+*html message+*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 follower notification email+*html message+*children+*children Cards formed by "mating" follower notification email+*html message+*children with another card. eg: "follower notification email+*html message+*children+mate".