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For other uses, see simile (disambiguation).

SIMILE (Semantic Interoperability of Metadata and Information in unLike Environments) was a joint research project run by the World Wide Web Consortium (W3C), Massachusetts Institute of Technology Libraries and CSAIL and funded by the Andrew W. Mellon Foundation. The project ran from 2003 to August 2008. It focused on developing tools to increase the interoperability of disparate digital collections, much of SIMILE's technical focus is oriented towards Semantic Web technology and standards such as Resource Description Framework (RDF).


SIMILE stands for Semantic Interoperability of Metadata and Information in unLike Environments. It was born out of DSpace, the open source system digital repository for scholarly materials developed at MIT. DSpace, which is now used at a number of research institutions, archives scholarly publications and makes them accessible. The aim of DSpace is to make it possible to federate the collections of the various holding libraries, avoiding the entombment of the contents of each DL within its individual research community. In order to grow and enable its users to find research material which has been described in various domain-specific ways, DSpace needs the ability to support metadata schemas beyond Dublin Core. The challenge for DSpace and other digital libraries is to assist communities in dealing with different schemes, vocabularies, ontologies and metadata and to provide research services to their users.

SIMILE projects[edit]

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