Expressions - 6.3

Talend Data Mapper User Guide

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Expressions may be specified in structure elements. The main use for this is to specify default values and validation expressions that are associated with the structure. In all cases the expressions in the structure are copied to the map when the structure is associated with the map, and unless overridden by an explicit specification of the expression in the map they are re-copied if they subsequently change in the structure. See Expressions for more details.