Map Designer Express's validation process verifies the accuracy of the map's data flow by performing the following checks:
Move transformation--only one source attribute is involved.
Join transformation--more than one source attribute is involved.
Split transformation--only one source attribute is involved; split index is greater than or equal to zero; split delimiter is not empty.
Set Value transformation--no source attribute is involved; a value has been specified.
Submap transformation--at least one source attribute is involved; submap name is specified.
Cross-Reference transformation--only one source attribute is involved.
Map Designer Express automatically validates a map when you save it. You can also choose to validate the map by performing either of the following actions:
At this point, if you have specified any options on the Validation tab of the Preferences dialog, Map Designer Express will issue a warning if the specific condition is not mapped.
For more information on setting dependencies between attributes, see "Using execution order".