ResourceSync will research, develop, prototype, test, and deploy mechanisms for the large-scale synchronization of web resources. ResourceSync is a joint cooperation between NISO and the Open Archives Initiative (OAI) team. builds on the OAI-PMH strategies. As we move from a web of documents to a web of data, synchronization becomes even more important: decisions made based on unsynchronized or incoherent scientific or economic data can have serious deleterious impact.