Open source software which allows user to draw ER/flow diagrams for my web application

Question

we are developing a web application which allows a user to draw diagrams(flow/ER diagrams) and we need the representation of that diagram in some XML or other formats. How should we acheive this ?? is there any open source software or jQuery plugin or anyother server side software??

Answer 1

How about something like SlickMap? It lets you create the diagram structure as HTML, which then gets styled using CSS.

Answer 2

SlickMap is great! Thanks!