Provided by: University of Connecticut
Topic: Big Data
Date Added: Jun 2009
The authors present a systematic study of the OASIS WS-BPEL 2.0 standard (henceforth simply called BPEL) based on two complementary methods: the process of constructing a new high-level BPEL implementation driven by the structure of the standard, and an empirical evaluation of existing interpretations of the standard reflected in five widely available BPEL-implementations, both commercial and open source. In doing so they uncover a number of new ambiguities. Most notably, BPEL's integration of XPath 1.0, the data access component of BPEL, turns out to be inconsistent with the XPath standard itself, which is evidenced by substantially differing results produced by existing implementations on test cases constructed to exercise their interpretation.