This data structure holds a pair of handles, one for a DL and another for a data store opened and being managed by the DL.

typedef struct cssm_dl_db_handle {
    CSSM_DL_HANDLE DLHandle;
    CSSM_DB_HANDLE DBHandle;
} CSSM_DL_DB_HANDLE, *CSSM_DL_DB_HANDLE_PTR;

Definitions:

DLHandle

Handle of an attached module that provides DL services.

DBHandle

Handle of an open data store that is currently under the management of the DL module specified by the DLHandle.