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Another way to access tabular data is to embed employ a lookup table structure in a package. This example takes various obstetric ultrasound measured parameters and looks up a calculated gestational age.

First let's do the table model:

Package FL_GA_Package

    class  FLToGestationalAgeMap
        FLMeasurement: Real
        AgeinWeeks: Real

    class  FLToGestationalAgeTableType extends Sequence (FLToGestationalAgeMap)

EndPackage 

Then the table declaration:

-- Table Declaration

Let FLToGestationalAgeTable:
        FLToGestationalAgeTableType =
            Sequence{
            FLToGestationalAgeMap{FLMeasurement = 1.0, AgeinWeeks = 12.8},
            FLToGestationalAgeMap{FLMeasurement = 1.1, AgeinWeeks = 13.1},
            FLToGestationalAgeMap{FLMeasurement = 1.2, AgeinWeeks = 13.4},
            FLToGestationalAgeMap{FLMeasurement = 1.3, AgeinWeeks = 13.6},
            FLToGestationalAgeMap{FLMeasurement = 1.4, AgeinWeeks = 13.9},
            FLToGestationalAgeMap{FLMeasurement = 1.5, AgeinWeeks = 14.2},
            FLToGestationalAgeMap{FLMeasurement = 1.6, AgeinWeeks = 14.5},
            FLToGestationalAgeMap{FLMeasurement = 1.7, AgeinWeeks = 14.8},
            FLToGestationalAgeMap{FLMeasurement = 1.8, AgeinWeeks = 15.1},
            FLToGestationalAgeMap{FLMeasurement = 1.9, AgeinWeeks = 15.4},
            FLToGestationalAgeMap{FLMeasurement = 2.0, AgeinWeeks = 15.7},
            FLToGestationalAgeMap{FLMeasurement = 2.1, AgeinWeeks = 16.0},
            FLToGestationalAgeMap{FLMeasurement = 2.2, AgeinWeeks = 16.3},
            FLToGestationalAgeMap{FLMeasurement = 2.3, AgeinWeeks = 16.6},
            FLToGestationalAgeMap{FLMeasurement = 2.4, AgeinWeeks = 16.9},
            FLToGestationalAgeMap{FLMeasurement = 2.5, AgeinWeeks = 17.2},
            FLToGestationalAgeMap{FLMeasurement = 2.6, AgeinWeeks = 17.6},
            FLToGestationalAgeMap{FLMeasurement = 2.7, AgeinWeeks = 17.9},
            FLToGestationalAgeMap{FLMeasurement = 2.8, AgeinWeeks = 18.2},
            FLToGestationalAgeMap{FLMeasurement = 2.9, AgeinWeeks = 18.6},
            FLToGestationalAgeMap{FLMeasurement = 3.0, AgeinWeeks = 18.9},
            FLToGestationalAgeMap{FLMeasurement = 3.1, AgeinWeeks = 19.2},
            FLToGestationalAgeMap{FLMeasurement = 3.2, AgeinWeeks = 19.6},
            FLToGestationalAgeMap{FLMeasurement = 3.3, AgeinWeeks = 19.9},
            FLToGestationalAgeMap{FLMeasurement = 3.4, AgeinWeeks = 20.3},
            FLToGestationalAgeMap{FLMeasurement = 3.5, AgeinWeeks = 20.7}
              }

And finally the code. In this example, the input could have come from an archetype and this section is commented out.

imports iso_21090_datatypes


/*
Let femurLength: Real = If template.Third_Trimester_Growth_Scan
                            .Findings
                            .Fetal_Biometry
                            .Femur_Length_FL
                            .Measurement
                            .oclIsDefined() then
                    template.Third_Trimester_Growth_Scan
                            .Findings
                            .Fetal_Biometry
                            .Femur_Length_FL
                            .Measurement
                            .value.oclAsType(PQ)
                            .value
                            else null
                           endif
*/

Let femurLength: PQ = PQ{value = 3.2, unit='cm'}


If (femurLength.value >= FLToGestationalAgeTable.first().FLMeasurement) and (femurLength.value <= FLToGestationalAgeTable.last().FLMeasurement) then

  FLToGestationalAgeTable->select(o | femurLength.value >= o.FLMeasurement).last().AgeinWeeks.toChar()

else
  ''
endif

Here is how that looks in Result Explorer:

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