Files in DjVu format may now be uploaded to Wiki*edia. For now there is no
inline rendering (eg thumbnails), so it's only really suitable for archival data
such as the scans of books that go into Wikisource.
DjVu is a compressed image file format targeted at electronic versions of
documents, including multi-page and machine-readable text support. As an open
format which handles scanned documents better than PDF, it's used for a number
of online library projects and similar. For more background, please see:
http://en.wikipedia.org/wiki/DjVu
Files are checked for validity on upload, and the pixel resolution of the first
page is recorded as the file's size. (See DjVuImage.php for implementation. As
with SVG, you still have to whitelist the .djvu extension manually on third-
party MediaWiki installations and make sure your web server is configured to
serve the proper MIME type, image/vnd.djvu.)
-- brion vibber (brion @
pobox.com)