The Koninklijke Bibliotheek has released EPUB for Archival Preservation.
Here's an excerpt:
Over the last few years, the EPUB format has become increasingly popular in the consumer market. A number of publishers have indicated their wish to use EPUB for supplying their electronic publications to the KB. In response to this, the KB's Departments of Collection and Collection Care requested an initial study to investigate the suitability of the format for archival preservation. The main questions were:
- What are the main characteristics of EPUB?
- What functionality does EPUB provide, and is this sufficient for representing e.g. content with sophisticated layout and typography requirements?
- How well is the EPUB supported by software tools that are used in (pre-)ingest workflows?
- How suitable is EPUB for archival preservation? What are the main risks?