anchor.diff:  
   The following process diagram shows a simple handling of an order. Since the checking of the customer's credit could be common to many other processes, the _check credit step_ is modeled here as a call activity.
   
  -image::images/image::images/bpmn.conditional.sequence.flow.png[align="center"][align="center"]Ω
  +image::images/bpmn.call.activity.super.process.png[align="center"]
   
   The process looks as follows:
   
  
positive.code: ===== Graphical notation
  
  
  A cancel boundary event is visualized as a typical intermediate event (Circle with smaller circle inside) on the boundary, with the cancel icon inside. The cancel icon is white (unfilled), to indicate the _catching_
  
  image::images/bpmn.boundary.cancel.event.png[align="center"]	 semantics.
  
  
  
  
negative.code: ﻿[[bpmnConstructs]]
  
  == BPMN 2.0 Constructs
  
  