posted 14 years ago
Basically when a page belongs to a long-running conversation (LRC), a conversation identifier (cid) is sent as part of the response when the page is rendered. When you leave that page and navigate around the application or even to another site, you can use the back-button to return to the page. When you then click a link or button on the page, the cid is sent back with the form allowing Seam to identify the conversation associated with the page. The request is then processed within the context of the conversation.
How this works is described in-depth with diagrams and discussion in chapter 8 of the book. I hope that helps.