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- Isaksson, Ola, et al.
(författare)
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Trends in product modelling : an ENDREA perspective
- 2000
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Ingår i: Proceedings / Produktmodeller 2000. - Linköping : Linköping universitet.
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Konferensbidrag (refereegranskat)abstract
- The success of engineering companies is highly dependent on how well product information is managed, engineered and communicated. From marketing through development to after sales activities, data needs to be accessible and used in the best way. Today, geographical distance, the need for close co-operation and data complexity are all natural parts of the working environment. Product modelling techniques are continuously evolving with new requirements and opportunities emerging daily. This paper will outline and discuss some of these trends, and at the same time present some of the areas where research is being carried out within projects in the Product Model Cluster in the national graduate school - The Swedish Engineering Design Research and Education Agenda (ENDREA).
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- Josifovski, Vanja, et al.
(författare)
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Join Strategies for Distributed Mediation
- 2001
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Ingår i: 5th East-European Conference on Advances in Databases and Information Systems.
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Konferensbidrag (refereegranskat)
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- Katchaounov, Timour, et al.
(författare)
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Interface Capabilities for Query Processing in Peer Mediator Systems
- 2003
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- A peer mediator system (PMS) is a decentralized mediator system based on the P2P paradigm, where mediators integrate data sources and other mediators through views defined in a multi-mediator query language. In a PMS mediator peers compose views in terms of views in other peers - mediators and sources, or directly pose queries in the multi-mediator query language to some peer. All peers are fully autonomous and there is no central catalog or controller. Each peer in a PMS must provide an interface to its data and meta-data sufficient to allow the cooperative processing of queries by the PMS. We analyze the computational capabilities and meta-data that a software system has to export in order to participate as a peer in a PMS. For the analysis we identify and compare six classes of peer interfaces with increasing complexity. For each class we investigate the performance and scalability implications that result from the available capabilities and required meta-data. Our results are two-fold: \emphi) we provide guidelines for the design of mediator peers that can make best use of the interfaces provided by the data sources, and \emphii) we analyze the tradeoffs in the design of inter-mediator interfaces so that mediator peers can efficiently cooperate to process queries against other composed mediators. Finally we describe the choices made in a concrete implementation of a PMS.
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