In April 2009 World Digital Library was released. By giving an online access to digital copies of the significant world culture heritage materials its developers – UNESCO and Library of Congress – aim to promote international and intercultural understanding. The article describes backround of the project and features of the digital library user interface.

A description of some of the fundamental concepts in CASPAR as well as the metrics by which CASPAR believes that it, and other projects which claim to aid the practice of digital preservation, should be judged. It shows how CAPSAR attempts to follow the OAIS Reference Model and to employ concept of virtualization. CASPAR preservation infrastructure and some of its components are described in more detail including Registry/Repository and Knowledge Manager.