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Level-0 Data Flow Diagram - Coggle Diagram
Level-0 Data Flow Diagram
C. All other observations that makes the UML
It is similar to a context level DFD except the main process diagram gets expanded and becomes a series of processes
A. Key Elements
External Entity
Processes
Data Flow
Data Store
B. Notions and their significance
External Entity
Represented by a box
Consist of the name of entity that will interact with a process
Process
Represented by a box with curves edges on the four corners, the box is divided into two, one side is 1/4 and the next side is 3/4.
In the 1/4 part the processed is numbered in the order it occurs followed by a 0 behind eg 1.0
In the 3/4 part the process is named based on the what you are processing
Data Flow
Represented by a closed arrow from an entity to the process diagram
In between the arrow is named based on what is going to be achieved in the process diagram eg Job description -> create job opening
Data Store
Represented by a horizontal rectangular with the end side to the right open, a quarter line is drawn in the rectangle.
Database is in the datastore, stores the information from the processes eg like Job DB
The arrow is pointing an arrow (data flow) straight from a process diagram to the datastore
Information also moves out of the data store to processes
Movements also happen from process diagrams to entities