A rectangle with a name within it is a block. The block with named compartments includes constraints, left brace x greater than y right brace, operations, o p 1 left parenthesis p 1 to type 1 right parenthesis to type 2. Parts, property 1 to block 1. References property 2 to block 2. Values, property 3 to integer = 99 left brace constant right brace property 4 to type. Interface definition is a rectangle with an interface name and includes o p 1 left parenthesis right parenthesis to o p type. Flow specification definition includes flow spec name, flow properties, in attribute 1 to type, out attribute 2 to type, in out attribute 3 to type. A line with a diamond along it is aggregation. A line with a black diamond along it is composition. An unbroken ...

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