We are developing a style guide for workflow diagrams created by our staff. Two questions about technique:
1. System elements - We know that this can be used to represent a process that occurs in a system. The question is whether it is common to put these in a separate swimlane (System swimlane) or whether it is okay to have the system step within a regular user swimlane. Does the 2nd option break any rules?
2. Off-page reference elements - Can a diagram end with an off-page reference or must it have also an "start/end" element.
