The Symbol Item Type is a classification that represents a predefined graphical depiction. This Item Type is derived from the Representation class. A Symbol representation is created every time an item is placed on a drawing. Every PlantItem has an associated Symbol representation.
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ModelItems, such as OPCs and ItemNotes also have symbol representations.
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When a PipeRun or SignalRun is placed on a drawing, multiple representations are created.
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Symbol representations can own the following RepresentationTypes: Gap, OPC, Symbol, and Branch.