Originally posted by Mourn
3rd-party products cannot be published in a way that makes the core books unnecessary. So, no more "complete" games that reprint large chunks of the core books. Instead, publishers will have to focus on content that references the core books (the SRD now being an actual reference document that points to "open content," rather than a container for OGC) rather than reprinting it. So, this sounds like the Advanced Player's Guide is just fine, but something like the WoW RPG (which reprints over 100 pages from the SRD) is not.