A Aribeula the biggest issue is digital rights management. At the moment, acting as an honest broker between the public interest and the individual rights holders is incredibly difficult. Much more so than with printed material that is physically deposited on your site. Many electronic property holders lease material and specifically prohibit copying for preservation purposes. The law, as it stands, is on their side. The rights holders are terrified – rightly so in my view – that once it's in the public domain it can be copied any number of times illicitly without any redress."