In my spare time I’m working on a huge document/book “Business Analysis in B2B/EDI”, decided to share a small part…
In the structures of different complexity, it is necessary to be able to indicate the exact path to the record/segment and/or field/element. For example, in X12 there might be DTM segments at different levels, and just “DTM” won’t be enough to understand which one is needed in many cases. So, you should know how to provide the right paths. And, different formats use different approaches.
Since records/segments are named entities, their names are a good starting point to use. But while records in SAP IDoc are unique (i.e. you cannot have 2 records with the same name at the different levels) and you can use the name to identify its exact position, the other formats can use the same records/segments at different levels.