title: What is the difference between state and activity of activity diagram in UML?
body: <p>Now I'm learning UML. While I'm trying to draw an activity diagram, I find two things, the state and activity . What's the difference between those two things? I try to find those in google but don't get a clear explanation. Can somebody explain me with simple explanation about those?</p>
  
  <p>Thanks in advance.</p>
  
  <p>Kevin</p>
  
  <p>Edit :</p>
  
  <p>btw, I found those two things in IBM rational rose.</p>