Yes use the buiilin service convertToString to validate 850 transaction set ST level against its FFschema,and if you have any custom requirements in the validation process you may have to code a custom service and validate for the uniqueness of PONumber,Dates sort of…TN can do validation of EDI Controlnumbers,sender/receiver/docid’s and check for duplicates.
Please go thru the EDICoreuserguide,TNUserguide on how to use EDITPA’s validation etc…
HTH,
RMG
#webMethods#edi#Integration-Server-and-ESB