Regarding utilizing and understanding using webMethods EDI mapping,pls follow the wMEDISamples package and also there is a lot of userguides.pdf available under the wMEDI, wMEDIforTN packages/doc folder section,It gives enough information for better understanding and startup the flow.
This information is available on all webMethods IS versions including latest wM 6.01.
Thanks,
#Integration-Server-and-ESB#webMethods#webMethods-General#webMethods-Upgrade