Example of data mappings for rule creation

The following sample data mappings can be used for rule creation.

Sample data mappings for rule creation

Data mapping	Data set	Data series	Items	Sample rule expressions
Rules (Single data point in data mapping)	BMI	Weight	Weight item always part of the data series. Weight item appears on only one form.	BMI.Weight.Value / Math.Pow(BMI.Height.Value, 2)
		Height	Height item always part of the data series. Height item appears on only one form.
Rules (Multiple data points in data mapping)	BMI	Weight	Weight item always part of the data series. Weight item appears on multiple forms, so you must specify which value to use in the rule expression.	BMI.StudyEvent(StudyEvents.Visit1).Weight.Values[0] / Math.Pow(BMI.Height.Value, 2) BMI.StudyEvent(StudyEvents.FinalVisit).Weight.Values[0] / Math.Pow(BMI.Height.Value, 2)
		Height	Height item always part of the data series. Height item appears on only one form.

Notes:

Math.Pow computes the power of a value. You can also define functions for calculating a squared value.
As with any calculation rule, in data mapping rules you should check for empty values and for division by zero.

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