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Meta-Data Objects as the Basis for System Evolution | Florida Estrella
; Richard McClatchey
; Norbert Toth Zsolt Kovacs
; Jean-Marie Le Goff
; | Date: |
30 Jul 2001 | Journal: | Lecture Notes in Computer Science Vol 2118, pp 390-399 ISBN 3-540-42298-6 Springer-Verlag, 2001 | Subject: | Instrumentation and Detectors; Computational Physics | physics.ins-det physics.comp-ph | Affiliation: | University of the West of England) Zsolt Kovacs, Jean-Marie Le Goff (CERN / EP Division | Abstract: | One of the main factors driving object-oriented software development in the Web- age is the need for systems to evolve as user requirements change. A crucial factor in the creation of adaptable systems dealing with changing requirements is the suitability of the underlying technology in allowing the evolution of the system. A reflective system utilizes an open architecture where implicit system aspects are reified to become explicit first-class (meta-data) objects. These implicit system aspects are often fundamental structures which are inaccessible and immutable, and their reification as meta-data objects can serve as the basis for changes and extensions to the system, making it self- describing. To address the evolvability issue, this paper proposes a reflective architecture based on two orthogonal abstractions - model abstraction and information abstraction. In this architecture the modeling abstractions allow for the separation of the description meta-data from the system aspects they represent so that they can be managed and versioned independently, asynchronously and explicitly. A practical example of this philosophy, the CRISTAL project, is used to demonstrate the use of meta-data objects to handle system evolution. | Source: | arXiv, physics/0107073 | Services: | Forum | Review | PDF | Favorites |
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