Different types of files can be stored on the Document Server with different levels of security:
- Level 0 - No security is needed for delivery (used for files of books in the Public Domain only).
- Level 1 – Rather low level of security, used for files prepared for Braille print. These files have been processed for Braille editing so that information concerning the original layout, images, has been lost. Moreover the coding of the document uses specific Braille codes. Such files cannot be used to recover the original book format.
- Level 2 – highest level used for source files provided by the publishers.
Different group of users have been considered, each being allowed to achieve
different operations:
- Administrators have full access to all documents (level 2) and administration front-end
- Special Printing Houses have access to source files provided by publishers in order to adapt them (level 2) and to files pre-processed for special print (level 1)
- Registred readers only have access to files pre-processed for HTML navigation on Braille displays (level 2)
- Anybody may access documents at the level 0.