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...ware systems or humans) are responsible for the enactment of activities, and dependencies determine the execution sequence of activities and the data flow between them. The meta model shown in Fig. 1 =-=[6, 18]-=- gives a description of the static and the dynamic schema aspects as well as of the organizational aspects. The workflow model we base our development of a warehouse architecture is able to capture wo...

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...is organization may take part in several choreographies and several choreographies may be reflected as a single orchestration. Work partly supported by the Commission of the European Union within the project WS-Diamond in FP6.STREP. J.F. Roddick et al. (Eds.): ER Workshops 2006, LNCS 4231, pp. 183–192, 2006. © Springer-Verlag Berlin Heidelberg 2006 184 J. Eder, M. Lehmann, and A. Tahamtan In this paper we propose a new metamodel which gives a consistent and integrated view on both choreographies and orchestrations and their mutual relationships. We use an extension of our workflow metamodel [6,9] which enables convenient and flexible representation and analysis of choreographies and orchestrations. Moreover, we propose a novel approach to combine several choreographies into more complex federated choreographies. Our federated choreographies are more flexible than typical compositional approaches. 2 Federated Choreographies A Web Service choreography specifies a communication protocol for all involved partners. The outcome of the choreography is a virtual process definition viewed from the global perspective where all partners are treated equally [4]. On the other hand, Web Service orc...

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... complex. A complex activity consists of ni parallel (and), sequential (seq), conditional (or) or alternative (alt) sub-activities Ti 1 ,...,Ti ni , each of which is either elementary or complex (cf. =-=[3]-=-). (Complex) activities between seq-split and seq-join are always executed in sequence. An and-split node refers to a control element with several immediate successors, all of which are executed in pa...

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...P meta-model, i.e., with a set of rules that constitute asguidance for the construction of the BP.sIn this paper the main assumption imposed by the BPAL meta-model is thesstructuredness. According to =-=[11]-=-, a strictly structured BP can be defined as follows:sit consists of m sequential blocks, T1 …Tm. Each block Ti is either elementary, i.e., it issan activity, or complex. A complex block i) starts wit...

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...low between activities. See Fig.1 for an example workflow. Due to conditionals not all instances of a workflow execute the same activities. We classify workflow instances into workflow instance types =-=[EG03]-=- according to the actual executed activities. A workflow instancesshipOrder (order[r]) DG.I enterOrder (order[w]) produceBill (order[r],bill[w]) sendBill (bill[r]) fileOrder (order[w]) notifyCustomer ...

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...riant of AOP: the weaved aspects are the injected IAM tasks, and join points are defined by security annotations in the process. A major advantage of our approach is the built-in support for SSO and cross-organizational IAM. An interesting extension could be to decouple security annotations from the WS-BPEL definition, to store them in a separate repository and to dynamically adapt to changes at runtime. A plethora of work has been published on transformations and structural mappings of business process models. Most notably, our solution builds on work by Saquid/Orlowska [76], and Eder/Gruber [77] who presented a meta model for block structured workflow models that is capable of capturing atomic transformation actions. These transformation building blocks are important for more complex transformations, as in our case when multiple process fragments for enforcement of entailment constraints are combined for a single action in WSBPEL. While this work focuses mainly on deployment time model transformations, other research also investigates runtime changes of service compositions. For instance, automatic process instrumentation and runtime transformation have previously been applied in the...

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...of defining a BP meta-modelsthat will represent a guiding framework for the BP designer. In this paper, as ansexample, we show how to impose structured BPs by means of a BPAL meta-model.sAccording to =-=[10]-=-, a strictly structured BP can be defined as follows: it consists of mssequential blocks, T1 …Tm. Each block Ti is either elementary, i.e., it is an activity, orscomplex. A complex block i) starts wit...