The custom attributes for ISO_8583 messages are added to Trading Networks when you install Module for ISO_8583. The module checks if all the ISO_8583 Trading Networks attributes are already present during startup. If they are not present, the attributes are registered with Trading Networks. For information about how to view and manage document attributes, see the webMethods Trading Networks Administrator’s Guide for your release.

Module for ISO_8583 extracts the values for these attributes from the corresponding fields of the ISO_8583 message.