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A metadirectory system provides for the flow of data between one or more directory services and databases, in order to maintain synchronization of that data, and is an important part of identity management systems. The data being synchronized typically are collections of entries that contain user profiles and possibly authentication or policy information. Most metadirectory deployments synchronize data into at least one LDAP-based directory server, to ensure that LDAP-based applications such as single sign-on and portal servers have access to recent data, even if the data is mastered in a non-LDAP data source.

Metadirectory products support filtering and transformation of data in transit.

Most identity management suites from commercial vendors include a metadirectory product, or a user provisioning product.

Open source software[edit]

Ldap Synchronization Connector synchronize data from any data source including databases, LDAP directories or files by reading, transforming and comparing these data between the source and the target referentials. These connectors can then be used to continuously synchronize a data source to a directory, for a one shot import or just to compare differences by outputting CSV or LDIF format reports.

See also[edit]