OASIS, the international standards consortium, today announced that its members have approved the Web Services Business Process Execution Language (WS-BPEL) version 2.0 as an OASIS Standard, a status that signifies the highest level of ratification. WS-BPEL uses Web services standards to describe business process activities as Web services, defining how they can be composed to accomplish specific tasks.

http://www.oasis-open.org/news/oasis-news-2007-04-12.php