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  | Quintiq file version 2.0 
 |  #parent: #root 
 |  DeclarativeReferenceRelation CalcCurrencyRate 
 |  { 
 |    #keys: '1[11660.0.1848167736]' 
 |    Expression: 
 |    [* 
 |      // Use the latest available rate definition before the end of this period 
 |      // MODELING HANDLE : Project team can further customize the relation 
 |      return maxselect( this, 
 |                        Currency_MP.CurrencyRate_MP, 
 |                        rate, 
 |                        rate.Start() <= this.Period_MP().StartDate(), 
 |                        rate.Start() ); 
 |    *] 
 |    Relation: CurrencyRate_MP 
 |  } 
 |  
  |