Bogdan Marinoiu

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Many Web applications are based on dynamic interactions between Web components exchanging flows of information. Such a situation arises for instance in mashup systems or when monitoring distributed autonomous systems. Our work is in this challenging context that has generated recently a lot of attention; see Web 2.0. We introduce the axlog formal model for(More)
ManyWeb applications are based on dynamic interactions between Web components exchanging flows of information. Such a situation arises for instance in mashup systems [22] or when monitoring distributed autonomous systems [6]. This is a challenging problem that has generated recently a lot of attention; see Web 2.0 [38]. For capturing interactions between(More)
The workflow models have been essentially operation-centric for many years, ignoring almost completely the data aspects. Recently, a new paradigm of data-centric workflows, called business arti-facts, has been introduced by Nigam and Caswell. We follow this approach and propose a model where artifacts are XML documents that evolve in time due to(More)
In this paper, we develop algorithmic datalog-based foundations for the incremental processing of tree-pattern queries over active documents, i.e. document with incoming streams of data. We de-ne query satisability for such documents based on a logic with 3-values: true, false forever, and false for now. Also, given an active document and a query, part of(More)
—Towards a data-centric workflow approach, we introduce an artifact model to capture data and workflow management activities in distributed settings. The model is built on Active XML, i.e., XML trees including Web service calls. We argue that the model captures the essential features of business artifacts as described informally in [1] or discussed in [2].(More)