Data Flow Diagram

For each of the four (4) elements in a DFD, identify how the item is labeled (noun, verb, noun verb statement, etc.), and identify two rules excluding balancing.

1. External Entity

Label:

Rule 1:

Rule 2:

2. Data Flow

Label:

Rule 1:

Rule 2:

3. Data Store

Label:

Rule 1:

Rule 2:

4. Process

Label:

Rule 1:

Rule 2: