Data mappings make study objects available to rule expressions on a global level, without regard to the scope of a particular study object. Global study objects defined in a data mapping appear on the Data Mappings tab.
The Data Mappings tab (on the Expression tab of the Rule Wizard) lists:
A data series has the properties of the item that is mapped to it. If a data series contains an item that collects more than one value, the rule model properties for repeating study objects appear so you can access an array of all of the values of the item.
A method appears if you select the corresponding standard data dimension of the data set. You can use data set methods to return a subset of the data in the data set.
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