Certain e-journals may likely only be viewed from the reading room because anything else might undermine the publisher's business model, and that is not the purpose of a legal deposit.

Keeping the bits is not enough - you need to be able to recreate from them something that readers in decades and centuries to come will be able to use.

We cannot afford to lose anything, and the probability of that happening with four copies is minute.

We acknowledge the considerable work that has to be undertaken by publishers to make the transition to a new structure for their electronic journal content. However, by supporting a common structure for e-journal content we have established a shared international context in which such migration can now proceed.

The purists seem to think file emulation is the way to go, but it seems very complicated. We prefer to put our efforts into data migration - it is something we can do here and now.