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Case Base
MiningMart
Case
ModelCaseTelecom
Chain
HandleCallsData

Step: UnionOfPeriods

Name UnionOfPeriods
Belongs to Case ModelCaseTelecom
Uses Operator Union
Belongs to Chain HandleCallsData
Concepts of resulting Data Model InputCustomers
InputRevenues
CalldetailsAllPeriods
Has Parameters DataMode
FurtherConcepts0
FurtherConcepts1
TheInputConcept
TheOutputConcept

M4 Documentation:

The three periods are unified here. After this step the three six-months-periods have their own "marker", one value of the "Period" attribute. If the six-months-periods overlap, some data are multiplied here.