Louis Perrochon

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Complex event processing is a new technology for extracting information from distributed message-based systems. This technology allows users of a system to specify the information that is of interest to them. It can be low level network processing data or high level enterprise management intelligence, depending upon the role and viewpoint of individual(More)
A blind or visually impaired user can get lost in hyperspace on one single W3-page. This paper presents Web Access for Blind users (WAB), a working system which makes web-surfing easier for blind persons. Normally, structure and meta information in HTML documents are displayed visually and are difficult for blind users to recognize. WAB transforms structure(More)
This paper focuses on the problem of accessing interactive information servers ("interactive sessions" in W3-terminology, e.g. an existing library information system) directly with a W3-browser instead of opening an additional viewer (e.g. a terminal emulation program). IDLE is a language designed to describe the user interface of interactive information(More)
Distributed systems' runtime behavior can be difficult to understand. Concurrent, distributed activity make notions of global state difficult to grasp. We focus on the runtime structure of a system, its execution architecture, and propose representing its evolution as a partially ordered set of predefined architectural event types. This representation(More)
Public information systems offering access to the network community can be divided into two groups: those with stateful protocols and those with stateless protocols. Evolving client-server protocols like the Hypertext Transfer Protocol (HTTP) of the WorldWide Web (W3) are stateless. In this case the reaction of the information server depends on the request(More)
This paper is based on the notion of data quality. It includes correctness, completeness and minimality for which a notational framework is shown. In long living databases the maintenance of data quality is a rst order issue. This paper shows that even well designed and implemented information systems cannot guarantee correct data in any circumstances. It(More)
CHAIMS supports an innovative paradigm in software engineering: Composition. The CHAIMS programming language focuses solely on integrating so-called megamodules into new applications. In doing this, CHAIMS exploits existing or emerging standards for interoperation like CORBA, ActiveX, JavaBeans or DCE. This approach reduces software development and(More)