⇒ Tree: Tree actors can be put in a Hierarchy with parents and children. The tree pawns maintain their own hierarchy that mirrors the actor hierarchy.
One of the most obvious differences between CSCW systems is the level at which they link interface features.
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mirror | BrE ˈmɪrə, AmE ˈmɪrər | A noun (literal or figurative) Spiegel (Mask.) ▸ hold the mirror up to sb/sth (figurative) jmdm./einer Sache den Spiegel vorhalten ▸ it's all done with mirrors (informal) das Ganze ist nur ein Trick B transitive verb (literal or figurative) [wider]spiegeln ▸ be mirrored in sth sich in etw. (Dat.) [wider]spiegeln