Introduction
Online data is stored in both databases (relational) and web sites (hypertext)
Need single framework to manage both types of data and present integrated views
Solution: Web Base Management Systems (WBMSs)
- 2 challenges
1) querying and extracting structure from semi-structured web data, transforming it, and presenting custom views
2) mapping structured database data to the web (adding navigational access paths, redundancy, ...)
- To address these challenges, we need a data model that maps between relational and hypertextual models