The preservation of documentary heritage materials is one of the daunting tasks of memory institutions worldwide. This task is becoming more and more important, not least because of the fast development of the Internet and the digital technologies as well as with the well-documented need for updated legislation at national and international levels. For UNESCO, it is beyond doubt that humanity’s documentary heritage is a fundamental expression of the richness and diversity of different cultures and traditions and its preservation is therefore considered of the utmost importance. …