I'm working on my first EPUB eBook using pubcoder. Exported to EPUB3 format OK, but I get numerous critical and moderate violations when validating my EPUB for "WCAG 2.0 Level AA accessibility standards" using the Ace by DAISY validation software.
content.opf is missing language attributes on the <package> tag, plus numerous schema meta-tags are missing.
toc.xhtml is also missing language attributes on the <html> tag, plus <nav> tags are missing role and aria-label attributes.
I can add all these in manually, but is there a way to add custom meta-tags to a project or something so I don't need to do this every time I export a project to EPUB?
Would like to be able to declare my eBooks as meeting the WCAG 2.0 Level AA accessibility standards. Any solutions you can offer other than manually unzipping, editing and zipping up my EPUB's each time?