Mapping is the act of creating a template of data elements for a file the that are needed for an import or an export. A mapping definition is a type of mapping that is an essential component of the EDI Tool and used for a specific purpose.
As seen in a previous session, there are 3 basic steps in any EDI import or export, as illustrated below. Step two in the export process and step three in the import process involves the ability to evaluate data elements at moment in time.
On the export process, the evaluation serves the purpose of identifying the records that qualify to be in the export file.
On the import process, the evaluation serves the purpose of identifying elements in the inbound data and comparing them to existing data and, based on the results of these evaluations, perform calculated updates.