Working with topic trees

Topic tree is a GUI element used to select and browse topics in Wandora. Topics are arranged in the tree so that each branch is a subclass or instance of the root topic. In fact arrangement can be based to any binary relation. One topic tree locates in the left part of the Wandora window. By default the root of this tree is Wandora's base topic Wandora class (http://www.wandora.net/core/wandoraclass).