R1102 - modelint/shlaer-mellor-metamodel GitHub Wiki

R1102 / 1:1c

Operand is input from exactly one Data Flow

Data Flow provides input as zero or one Operand

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An Operand obtains its value from some Data Flow. An Operand may be any type of Scalar, Table, or Instance.

A given Data Flow may or may not convey an Operand.