Document flow
The sequence of documents in a process forms a document flow. Just a sequence of documents is a rare occurrence, so documents in a process are more likely to be in a hierarchy.
Documents in ERP.net often have sub-documents.
Most of the time, they're automatically generated or created by some fulfillment function.
However, manually entering a sub-document is also allowed and sometimes encouraged.
Documents and sub-documents can form a sequence, or hierarchy. The document flow design, therefore, is one of the most important aspects of implementing ERP.net for a target enterprise.
The design is achieved with the help of specific routes built for each document type.