To understand how does dLibra system work three common types of users have to be introduced:
Administrator - manages digital library (creates users and groups of users, grants rights to users and groups), can create and modify library structure, can use all of the dLibra system applications (administrator, editor, WWW) but generally uses administrator application,
Editor - creates digital library (adds new documents (publications) to library, creates or imports bibliographic description for documents, groups documents, generally has limited access to administrator application, uses editor application,
Reader - dLibra system user which has access only to web pages (WWW) placed on the Internet, can browse and read documents (publications) created and made available by the editor, cannot use neither editor nor administrator application, every person which visits dLibra web pages is treated as a reader.
These are three types of uses commonly used in digital libraries based on dLibra. Each has different duties and nature. Administrator takes care of a digital library as a whole, editor cares about the content of the digital library according to limits specified by the administrator, reader uses WWW to access documents (publications) stored by the editor in the digital library.