Virtual data transformations are described in Virtual Data Transformations. The syntax of a transformation parameter differs slightly if the data transformation is defined on a join data view. Because an attribute can be obtained from more than one data view, variables that define the attribute content must be fully qualified. That is, the source attribute value must include the name of the data view from which the attribute is taken.
For example, the following parameter creates an attribute from existing attributes in both the primary and secondary data views:
The firstName and domainName attributes are taken from the primary data view, and the lastName attribute is taken from the secondary data view.