Rather interesting result after deliberately introducing errors in the .opf file.
I added a space after the colon in the dc:language element and ran epubcheck expecting to get an error message. As soon as I clicked on epubcheck, the line changed. Pasted the modified line back and the same thing happens when I switch away from the .opf file for any reason.
Quote:
before:
<dc:identifier id="EbookISBN">9780391234567</dc:identifier>
<dc: language>en</dc:language>
<meta property="dcterms:modified">2025-03-21T00:16:26Z</meta>
<dc:date>2019-05-09</dc:date>
|
Quote:
after:
<dc:identifier id="EbookISBN">9780391234567</dc:identifier>
<dc:>en</dc:>
<meta property="dcterms:modified">2025-03-21T00:16:26Z</meta>
<dc:date>2019-05-09</dc:date>
|
I hadn't noticed this happening before but I haven't made a habit of deliberately introducing an error in the .opf file.