Are you trying to create EDI X12 850 schema from sef?Actually WM/EDI module provides all the EDI schemas by default in IS6.x.
What is your IS version?? If IS4.6 webMethods provides the templates which you can load the template records/schemas etc…in the developer by making use of WMEDI services.
Please let us know your environment details…
HTH,
RMG
#webMethods#Integration-Server-and-ESB#edi