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Hi Terry, This project (at least the cross-collection searching) sounds fairly similar to the People's Network Discovery Service that the MLA developed a few years ago (http://www.peoplesnetwork.gov.uk/discover/); probably worth talking to David Dawson there, if you haven't already. We've previously used OAI-PMH to integrate collections/content management systems (e.g. for the IWM), and for developing cross-collection searches (http://www.20thcenturylondon.org.uk - which re-uses the people's network OAI service). OAI-PMH is fine (if a little clunky) for aggregating data from multiple sources, but it's fairly limited if you want to run a true, real-time "federated" search; it's pretty limited in terms of the amount of parameters you can use to narrow down a search. I haven't had practical experience of using OpenSearch, but everything I've read suggests it would make the better protocol for a federated search. Thanks, Dan -------------------------------------- Dan Zambonini Box UK Internet Development and Consultancy t: +44 (0)29 2022 8822 f: +44 (0)29 2022 8820 e: [log in to unmask] w: www.boxuk.com -------------------------------------- > -----Original Message----- > From: Museums Computer Group [mailto:[log in to unmask]] On Behalf Of > Terry Makewell > Sent: Thursday, August 30, 2007 9:19 AM > To: [log in to unmask] > Subject: Federating Searching (OpenSearch and OAI-PMH) > > The National Museums Online Learning Project, funded by the Treasury's > Invest to Save initiative, is a significant new partnership project > involving 9 national museums (British Museum, Imperial War Museum, > National Portrait Gallery, Natural History Museum, Royal Armouries, Sir > John Soane's Museum, Tate, The Wallace Collection and the Victoria and > Albert Museum as Lead Member). > <snipped /> ************************************************** For mcg information and to manage your subscription to the list, visit the website at http://www.museumscomputergroup.org.uk **************************************************