The User Content Directory (UCD) provides a storage location for applications to store and access user data, to improve the user experience. For example, the Favorites of the Portal Content Catalog, which are shortcuts to the folders specified by the user, are stored in the UCD.

In addition to the implementation that is provided for application favorites, you may need to store other application specific data per user. The UCD is accessed and managed using the JNDI API. You can use the JNDI API to create custom implementations for storing user data in the UCD.

More information: Storing User Data in the User Content Directory (UCD)