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Issue No.04 - Oct.-Dec. (2014 vol.7)
pp: 530-544
Carlos Muller , ETS. Ingeniería Informática, University of Seville , Sevilla, Spain
Manuel Resinas , ETS. Ingeniería Informática, University of Seville, Sevilla, Spain
Antonio Ruiz-Cortes , ETS. Ingeniería Informática, University of Seville, Sevilla, Spain
ABSTRACT
WS-Agreement is one of the most widely used SLA specifications. An advantage of WS-Agreement over other agreement metamodels is that it allows one to define conditional and optional term sets inside an agreement document, which are commonly found features in real-world agreements. Unfortunately, they increase the complexity of the automated detection and explanation of conflicts between SLA terms, leading to new kinds of conflicts that are not supported by current techniques. Furthermore, creating a general-purpose conflict analyser in WS-Agreement is a hard task since it should understand the semantics of an unbounded number of languages that can be used in the eight extension points that WS-Agreement includes for the sake of flexibility. In this article, we address these issues by providing a conflict classification for SLAs that includes new conflicts derived from the use of conditional and optional term sets; and a novel language-agnostic technique based on constraint satisfaction problems to automatically detect and explain these conflicts. In pursuing these results, we defined some WS-Agreement concepts as well as a fully-fledged WS-Agreement-compliant language. The developed technique and its reference implementation have been thoroughly validated.
INDEX TERMS
Semantics, Proposals, Complexity theory, Context modeling, XML,consistency, Service level agreement, SLA, WS-agreement, conflict management
CITATION
Carlos Muller, Manuel Resinas, Antonio Ruiz-Cortes, "Automated Analysis of Conflicts in WS-Agreement", IEEE Transactions on Services Computing, vol.7, no. 4, pp. 530-544, Oct.-Dec. 2014, doi:10.1109/TSC.2013.9
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