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I.3.1 The concept of “Group”

A Group is characterized by its name (a String object) and the entities it contains. Four type of entities can be contained in a FeResPost Group: coordinate systems, nodes, elements and rigid body elements (RBEs). At C++ level, for each type of entity, the class group manages a set of integers corresponding to the identifiers of the entities.

Part of the operations dealing with Groups are done by methods defined in DataBase class. The methods of DataBase specially devoted to operations mainly related to Groups are described in section I.1.2.