A single EDI document consists of ISA/GS/ST header segments
ISA=Interchange Envelope (This can repeat) it ends with IEA segment
…GS=Group Envelope (This can repeat under ISA level) it ends with GE segment
…ST=Transaction Set it indicates whether EDI is PurchaseOrder(850) or Invoice (810) or ASN(856) etc…(This can repeat under GS level) it ends with SE segment
can a single EDI document be split into multiple EDI docs?
This is applicable if ISA/GS/ST(say 10 ST segments)then it is treated as 10 seperate EDI docs.
Please go thru the WmEDISamples package it has X12,EDIFACT sample services this comes with standard wM EDI module installation,and also visit ediuniversity.com for getting overall understanding of EDI concepts.