In preparing EPUB eBook format files, I have read you might use the following DTDs.
<?xml version='1.0' ?>
<!DOCTYPE html PUBLIC "+//ISBN 0-9673008-1-9//DTD OEB 1.0.1 Document//EN"
"http://openebook.org/dtds/oeb-1.0.1/oebdoc1.dtd">
<?xml version='1.0' ?>
<!DOCTYPE package PUBLIC "+//ISBN 0-9673008-1-9//DTD OEB 1.0.1 Package//EN"
"http://openebook.org/dtds/oeb-1.0.1/oebpkg1.dtd">
The URLs give a 404, so perhaps they have changed. Should HTMLvalidator include these DTDs, or include them in the master list?




