How can I detect changes in XML?

The changes I make to my XML document dont show up on my website til I clear my cache...?

• Does this mean that everyone who has previously visited my website before the changes will also have to manually clear their cache before they see the most recent changes? What is the best way to fix my problem? My XML Doc is being used in correlation with a flash slideshow.

• Answer:

  Unless your pages have cache-control headers added explicitly, the browser uses some heuristics to determine how long to cache pages and images for. So they will probably still see changes. If you want to control the changes, you can add Expires and HTTP/1.1 headers like Must-Revalidate. I've forgotten what exactly. You basically want to stop them caching for longer than your update cycle; if you make all your objects totally uncachable it will make your site slower.