From this it can be seen that the ‘digital library’ is not something that stands alone, but is a system. Gives us the understanding that the ‘digital library’ is more than just a collection of library materials in storage, but also provide various data recovery services to all users (both human and machine, maker, manager, and user information). Informational objects into various types of ‘documents’ to the object of traditional ‘live’ or the result of a dynamic query. Another thing is the ‘digital library’ provides to the user satisfaction of their needs and the things needed for management, access, storage, and manipulation of various information stored in the collections of library materials which represent the ownership of the library.
Even understanding the various users here too, can the end user, operator library, and also the ‘producer’ of information. In addition to structuring and presentation of information objects have to be an important part with respect to aesthetics. Objects of this information may also be a digital object or it could be another medium (eg paper) but presented in the library through a digital device (eg metadata). It may be available directly or indirectly in the network. Although not a data object information electronically or may not be directly available in the network, the object must be presented electronically in several ways through eg metadata or catalog. So in principle ‘digital library’ is a system-based integrated RAID 0 data recovery , although coverage is not necessarily information in digital form more details.