wait state, 266
waterfall life cycle, 34–35
Web sites
magazines, 373–374
about OCL, 373
about patterns, 250
search engines, 374
as source of information, 371–372
about UML 2, 373
UML Dictionary, 375
UML forums, 372–373, 375
UML home page, 372
for UML questions, 375
about UML tools, 374, 379–382
about UML training, 375
Web-based systems, UML modeling tools for, 33
when event, 288
workflow diagram. See activity diagram