Yes..i would really appreciate your feedback.

 I wanted to know Use case "include" and "extend" are they same as Use Case "dependency". Several places I have seen that they have indicated Use Case "depedency" can be 2 types which is "include" and "extend". Some other places Use Case "dependency" , "include" and "extend" they are all different and being utilized in the same use case. I am confused if "include"and "extend" are part of use case "dependency" or it is totally different? thanks for your response and feedback.

 ok some places on the internet I have seen they have showed all 3 the Use Case diagram. In our work environment we prefer writing detail use case in narrative. what about when you are writing in detail narrative use case? Use Case dependency is a part of narrative description then or do I need do describe it then? Second question how do you show a Use Case diagram when there is two system interacting with several Business users. Usually in system boundary you write one system name? how would you approach it? would you draw few diagrams to represent each different system? Thanks again for your valuable feedback.