From: "Kiley, Robert" <[log in to unmask]> Date: Wed, 30 May 2012 13:35:31 +0100 Dear List members Does anyone know whether there is any difference between an "ahead of print" (AOP) publication and a "version of record" (VOR) publication? Typically an AOP article may not include metadata like issue and page numbers - but other than this, can the AOP always be considered as identical to the VoR? I looked at the NISO Journal Article Versions document ( http://www.niso.org/publications/rp/RP-8-2008.pdf) but couldn't see any reference to the AOP version. Many thanks Robert Robert Kiley Head of Digital Services Wellcome Library mailto:[log in to unmask] Library Web site: http://library.wellcome.ac.uk