%V 5052 %I Springer %O ?Springer-Verlag Berlin Heidelberg 2008. The original publication is available at www.springerlink.com %P 199-215 %T A Formal Account of WS-BPEL %R 10.1007/978-3-540-68265-3_13 %B Coordination Models and Languages (COORDINATION 2008) %E Doug Lea %E Gianluigi Zavattaro %X We introduce B lite, a lightweight language for web services orchestration designed around some of WS-BPEL peculiar features like partner links, process termination, message correlation, long-running business transactions and compensation handlers. B lite formal presentation helps clarifying some ambiguous aspects of the WS-BPEL specification, which have led to engines implementing different semantics and, thus, have undermined portability of WS-BPEL programs over different platforms. We illustrate the main features of B lite by means of many examples, some of which are also exploited to test and compare the behaviour of three of the most known free WS-BPEL engines. %D 2008 %L eprints410 %A Alessandro Lapadula %A Rosario Pugliese %A Francesco Tiezzi %S Lecture Notes in Computer Science