Unfinished element gone, but one error remains
Okay, made the %20 change and then ran the corrected EPUB through Paul Durant's lovely epubcheck 3.0b5. I now have one remaining error:
ERROR: /OEBPS/content.opf(3,56): assertion failed: package dcterms:modified meta element must occur exactly once
Is this because I deleted some of the dc: terms that are irrelevant for this book? I deleted source, relation, and coverage, as I can't determine what to assign to these, and if I leave them in place, I get error messages.
New content.opf is attached. Thanks in advance!