Introduction
A Slide Library is a library type in SharePoint Server that exclusively contains single-slide presentations. Users are able to publish and reuse slides to/from these libraries. Furthermore, when a user inserts a slide from the library into a presentation, she is able to create an update relationship so that she is notified when the original slide on the server changes.
It is worth noting that the SlideUpdateInfo part in itself does not define the complete slide update functionality. That part requires a SharePoint Slide Library or compatible server (e.g., a webdav server that emulates SharePoint SOAP methods).