The “Make Beam-Set”-component provides a practical way for grouping different elements under one identifier (see fig. 220.127.116.11). Beam-sets need not be disjoint. The “Beam Id”-plug expects a list of strings with beam-identifiers, beam indexes, other beam-set-identifiers or a regular expression. Regular expressions have “&” as their first character by definition. “Set Id” expects a string which serves as identifier of the new set of beams.