Is there a standard notation for data flow diagram and user actions?

Question

block diagram

Good afternoon.
As part of one project, I need to draw a diagram that will depict the life cycle of a certain conditional application in the IT user application management system.
On the diagram, I need to depict:
- all the stages that this application goes through;
- all actions that the user can perform;
- all data that the system uses to manage this process (documents, tables, records, directories, variables).
I understand little in this kind of analysis and almost do not know how to correctly create such circuits, which is why I ask the question:

1. Is there a standard notation for this kind of schema? If yes, what is it called?
   
2. Is it acceptable to mix data flows, user actions and other entities on the same scheme? What do analysts usually do?
   

Thank you.

Answer 1

1. UML diagram
2. valid. In complex cases, separate state diagrams are built.

Answer 2

1) Look at BPMN. This is not an ideal notation, but it is used approximately for such tasks.
2) Yes.

Answer 3

1. Any more or less common notation has such mechanisms
2. Yes. And even happens often.

Answer 4

BPMN, or if it grows a lot, then break it into UML diagrams: use case, activities, sequences