8/21/00
IMS ADL IEEE LTSC Aug 21 2000
7
3-Tier
Architecture for Education Portal
•There are several important Object Models: COM, CORBA, Java, Web, Oracle Database ……
•But it doesn’t
matter what you use
if you specify in XML
if you specify in XML
Database
XML
File System
(Web Site)
File System
(Web Site)
Or
Middle
Tier
“Business Logic”
dissociates
User and Back End
“Business Logic”
dissociates
User and Back End
Export/Import
Request
Information
Object
Repository
Repository
