implies that, at one time or another, this format may no longer be supported, or that a change in
the user agreement may lead to restricted access, access to outdated material, or patent and
copyright issues. This fact means that the document must be freely accessible, without password
restrictions or protection, and without any digital rights management scheme. Blocking access to a
document with a password can lead to serious problems if the password gets lost. In addition, the
size and compactness of the document will influence the selection of a file format.