Appendix A 575 A.5 INTERNAL BLOCK DIAGRAM The internal block diagram is used to describe the internal structure of a block in terms of how its parts are interconnected. Please note that the symbols for ports described in Table A.6 are also used on the internal block diagram. Table A.11 Internal Block Diagram Nodes Diagram Element Part Node <Multiplicity> <Name>:[<Block>] initialValues Notation Description A part is a property of an owning block that is defined (typed) by another block. The part represents a usage of the defined block in the context of the owning block. Note that a Part Node may have the same compartments as a Block Node, with the compartment label prefixed by a colon. [<Block>] represents a property-specific type. An actor part is a property of an owning block that is defined (typed) by an actor. Section 7.3.1, 7.7.5 <Property>=<ValueExpression> Actor Part Node 12.5