1. The Strudel Web Site Management System Mary Fernandez, Daniela Florescu, Jaewoo Kang, Alon Levy, Dan Suciu

2. What is Strudel? A yummy pastry made of a thin sheet of dough filled with fruit or cheese. A web site management system that allows a site’s content, structure and appearance to be managed independently.

3. Strudel in a Nutshell Semi-structured data Keep information in a database (data graph) Write queries to create structure of Web site (site graph) Same representation used for both graphs For each object in site graph, use template to generate HTML

4. Why Do We Need Strudel? HTML sucks

5. Site restructuring Tailored pages Data integration (sort of)

6. Hasn’t this been done before? Front Page Cascaded Style Sheets XML CGI-bin scripts commercial database systems

7. The Data Graph Contains collections of objects with labeled edges Objects are either nodes with id’s or atomic Faculty fac4fac15 “Oren Etzioni” “name”“research” “info retrieval”“Alon Levy”“databases” “name”“research” “info retrieval”

8. StruQL - The Query Language Site TRansformation Und Query Language Used to query and create new graphs (data graphs or site graphs) Flexible (regexp’s, nested clauses)

9. Building a Site Graph WHEREFaculty(x), x -> “research” -> r, x -> “name” -> n CREATENew(r) LINKNew(r) -> “fieldName” -> r New(r) -> “researcher” -> n COLLECT ResearchPage(New(r)) ResearchPage r1r2 “databases” “fieldName”“researcher” “Alon Levy”“info retrieval” “fieldName”“researcher” “Alon Levy”“Oren Etzioni” “researcher”

10. HTML Templates HTML with extensions for formatting, conditionals, and enumeration Associated with specific object or collection or is specified in object’s definition A template for the ‘r’ objects: :

11. Data Integration Strudel allows integration of information from heterogeneous sources using a virtual architecture and a global-as-view approach... … or at least it will. Currently relies on wrappers

12. Results and Future Work Tested on AT&T and CNN sites Stuff to worry about –Data integration –Ordering –Incremental updates –Conversion of existing sites