using Data Flow Diagram or UML ?

i have built a system using CI. can I use DFD for modeling or must use UML?

I find UML works well for defining the data models and relationships especially if your data structures get complex.

I haven't really used dataflow much...though I guess that it would be useful for modeling how the controllers work.

I usually opt for UML diagrams just cause DFD's get so messy, but like Leo said, a combination of both might be good practice.

UML surely fits this CI, since it's MVC concept, the DFD isn't really the thing for this.

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