hi Lydia, I was wondering whether you are aware of the ResourceSync framework [1] for web-based resource synchronization that was specified in 2012-2013 by NISO and the Open Archives Initiative, which previously specified the Protocol for Metadata Harvesting (OAI-PMH) [2] and Object Reuse and Exchange (OAI-ORE) [3]. ResourceSync contains pull-oriented mechanisms for resource synchronization, specified in ANSI/NISO Z39.99-2014 [4]. But it also contains push-oriented, notification mechanisms that are based on PubSubHubbub. While fully compatible with PubSubHubbub, ResourceSync's notifications do not require a feed at the end of the party that notifies about changes. Rather notifications are directly pushed to a hub that relays them to subscribers.The notification spec [5] is currently in beta. Compliant software is at [6]. ResourceSync also includes provisions to convey metadata and links pertaining to a resource that is subject to synchronization as well as mechanisms that support third parties to discover which synchronization mechanisms a server supports. For a quick intro to ResourceSync , see the 16-minute video [7] or the slide deck [8]. I felt like bringing ResourceSync to your attention as it seems relevant to the work you are doing. Greetings Herbert Van de Sompel Digital Library Research & Prototyping Los Alamos National Laboratory, Research Library http://public.lanl.gov/herbertv/ @hvdsomp == [1] http://www.openarchives.org/rs/toc [2] http://www.openarchives.org/OAI/openarchivesprotocol.html [3] http://www.openarchives.org/ore/1.0/ [4] http://www.openarchives.org/rs/1.0/resourcesync [5] http://www.openarchives.org/rs/notification/0.9/notification [6] https://github.com/resync/resourcesync_push [7] https://www.youtube.com/watch?v=ASQ4jMYytsA [8] http://www.slideshare.net/hvdsomp/resource-sync-overview-33045191 On Fri, Jul 4, 2014 at 8:16 AM, Lydia Pintscher <lydia.pintscher(a)wikimedia.de> wrote: