You’ll want to create implementation guides for your partners to follow. Search the 'net for examples you can follow.
Use the default delimiters unless there is a specific reason not to.
The EDI modules within IS/TN can indeed use different delimiters. The ‘*’ is the default field delimiter. You can use any other character you wish. That said, if your partners are created EDI docs and sending them to you, they can use any delimiters they wish, though generally they will use the delimiters you ask them to use.
I would encourage you to get someone that has EDI experience to help out with this project. If you’re new to EDI and so is your partner, you can avoid many pitfalls by getting some help.
#Integration-Server-and-ESB#edi#webMethods