20.6. Exceptions and Error Handling
Exception handling has been ignored so far in the development of a solution. This was intentional to focus on the basic questions of responsibility assignment and object design. However, in application development, it's wise to consider the large-scale exception handling strategies during design modeling (as they have a large-scale architectural impact), and certainly during implementation. Briefly, in terms of the UML, exceptions can be indicated in the property strings of messages and operation declarations (see p. 256, for example).