- The document discusses the importance of documentation and preservation of cultural heritage sites, artifacts, and information as memory that is otherwise at risk of being lost over time. - It notes examples throughout history where destruction of sites like Bamiyan in Afghanistan and damage to monuments during war led to erasure of past memory without proper documentation and preservation. - While digital documentation promises total and eternal preservation, the document argues this is not truly possible as electronic storage devices are also at risk of deterioration and obsolescence over time. Specialized departments, best practices, resources, and education are needed to continually migrate digital information to new formats and systems to delay its vanishing.