title: How to model set of global variables
body: <p>I have to model the sequence of an initalization. 
  In this sequence one module A has to set globals of a module B.</p>
  
  <p>So how can I model this in UML.</p>
  
  <p>As there is no message or event I can't draw an arrow from Module A to Module B.</p>
  
  <p>My idea was to just set note or label next to the lifeline of Module A that the globals of Module B will be set. </p>
  
  <p>But this feels not realy "clean".</p>