Data Flow Diagrams – Difference between Lines and Arrows
I’m currently working with Visio to create Data Flow Diagrams for a System Analysis and Design class but I’m unsure what the difference between ------ and ------> is. I can connect 2 shapes together with a line (process, entity, data store) but does the single line connecting the two mean data flow? Do I need to explicitly use the data flow arrow to show which way data is flowing?
Do context diagrams have levels?
I heard that the context analysis diagram has different levels. I couldn’t find this in .Net, but I have seen that a DFD has different levels.
Could conditions be used with Data Flow Diagrams?
I’m trying to make a DFD for this scenario:
after admission, the patient gets the service he needs.