R810 - modelint/shlaer-mellor-metamodel GitHub Wiki

R810 / 1:1c

Data Flow is output by zero or one Gate Action

Gate Action outputs exactly one Data Flow

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Like a hardware multiplexer, a Gate Action delivers a single output Data Flow which conveys the value of whichever input Data Flow is selected during model execution.

Any given Data Flow may or may not be the output of a Gate Action.