R1168 - modelint/shlaer-mellor-metamodel GitHub Wiki

R1 / 1:Mc

Extract Action extracts value of exactly one Table Attribute

Table Attribute has value extracted by zero, one or many Extract Action

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By definition, the Extract Action extracts the value of a single Table Attribute from a Tuple Flow.

A given Table Attribute may be extracted by any number of Extract Actions or none at all.