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Erschienen in:
2006 | OriginalPaper | Buchkapitel
Towards a Unifying Theory for Web Services Composition
verfasst von : Manuel Mazzara, Ivan Lanese
Erschienen in: Web Services and Formal Methods
Verlag: Springer Berlin Heidelberg
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Recently the term
orchestration
has been introduced to address composition and coordination of
web services
. Several languages used to describe business processes using this approach have been presented, and most of them use the concepts of
long-running transactions
and
compensations
to cope with error handling. WS-BPEL, which is currently the most used orchestration language, also provides a Recovery Framework. However its complexity hinders rigorous treatment. In this paper, we address the notion of orchestration from a formal point of view with particular attention to transactions and compensations. In particular, we introduce
web
π
∞
, an untimed version of
web
π
, and the related theory, as a foundational unifying framework for orchestration able to meet composition requirements and to encode the whole BPEL itself.