Creating Map Rules

AutoMapper uses the rules that you create in the map field detail definition. Rules may be based on the subject area, the source, the target, or any combination, depending on the business rule being applied. AutoMapper considers only map rules that are defined with a subject area matching the map's subject area or those that are assigned the default enterprise subject area. The rules are made up of transformations, constant default values, translation sets, and field map hints. If the map rule is required, you will not have access to override the rule on the Map Field Detail page.

This order of precedence and conditions applies when you assign different rules to a single target field:

• Source

  The source field must exist on the source data object that is associated with the map. The source field type must be compatible with the target field type.

• Transformation

  The fields that are defined as joins or constraints from the source data object must exist on the source data object that is associated with the map.

• Translation Set

  The fields that are defined as the join to the from value of the translation set must exist on the source data object that is associated with the map.

If no rules were found to match a given target field, processing occurs in this order:

• Exact name match of target field.

• Default value for the target field.

• A zero or NULL is assigned to the field depending on its data type.

Use the Map Rule Definitions page (EOEW_RULE_DFN) to define map rules.

Navigation:

Enterprise Components > Data Transformation > Define Map Rules > Map Rule Definitions

This example illustrates the fields and controls on the Map Rule Definitions page. You can find definitions for the fields and controls later on this page.