POSC Meta Model Specifications Version 2.3 Logical Data Model

COLUMN_GROUP

(Rules) (Express)

A column_group defines a group of columns that together provide some logical meaning or a physical constraint. For example, if you have two columns that represent a quantity of length, one holding the numeric length value and the other holding the unit of measure that qualifies the numeric value, then these form a logical pair that is expressed with a column_group. Another example of column_group is to define those columns which are used in the construction of an index.


Entity projects as table COLUMN_GROUP.

Referenced in Diagrams:


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