Volume 5 : Number 2 : Paper 1 |
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January 2002 Special Issue of Best Papers presented at CLEI'2001. Merida, Venezuela. Guest Editor: Jose Aguilar (U de Los Andes, Venezuela)
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Title:
AVANTE: An architecture of CORBA components and XML Metadata for Web Based Instructions
Authors and Affiliations:
Adelaide Bianchini,
Edna Ruckhaus,
Victor Theoktisto, Universidad Sim
Abstract:
Most current solutions for Web Based Instruction (WBI) use a centralized management m
a proprierary internal representation. The AVANTE Architecture is a WBI environment assembled
using CORBA distributed components, implementing core services such as course management,
user authenrication, collaborative work, database access, presentation, and others. The AVANTE
components conform to a 4-riered m
Services component sublayers. Emergent XML standards for WBI describe all meradata
definitions. Components at the Management layer manipulate JDBC-SQL darn from the Low-
Level Services Layer, and combine it with corresponding XML Schemas, instantiating course
objects as new XML descriptions and component services. A filler-mapping service in the
Presentation layer produces the dynamic HTML web pages needed for user interaction, processing
these XML descr rions by lying one or more reviously defined XSL stylesheers. A similar
mechanism implements interface customizarian and remote service administration. The developed
WBI system was deployed with open source software. Adding CORBA components easily
achieves on-demand scalability. Furure services include auditing, adaprive interfaces, grading,
content development, and integration with existing systems.
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Received , Revised
Full paper, 15 pages
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PDF, 949 Kb ]
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