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The DOI Directory is a virtual service consisting of Handle System services (see Identifier / Resolution Services Based on the Handle System) and web proxies located and configured to provide highly reliable resolution, administration, and backup for all DOI names, regardless of the varying administrative arrangements of the Registration Agencies (RA). This approach provides the flexibility RAs need to develop individual business models and meet customer requirements while guaranteeing reliable overall service.

The DOI names are stored in Local Handle Services (LHS) which are usually managed by the DOI technical support service provider but may also be operated by the RA.

NOTE  All DOI names must be registered in the DOI Directory.