The DUA provides access to the X.500 Directory. This database includes information about resources associated with a computer network, such as users and application servers.
Directory entries consist of a collection of attributes.
These attributes can be used to maintain information about resources in a consistent form and to enable resource location by property instead of by physical addresses. A wide variety of applications can benefit from these capabilities. For instance, the Directory can assist a user in locating a particular file server. And, it can be used to locate people within an organization, such as those with responsibility for a particular function. OSSC DS-520 is a fully functional X.500 implementation, designed for demanding production environments.