EPUB 2 meta tags should be superseded by EPUB 3 ones

[mickael-menu]

When an OPF contains both an EPUB 2 (<meta name=>) and EPUB 3 (<meta property=>) meta tags for the same key, the EPUB 3 ones should take precedence and the EPUB 2 ones ignored. Currently both are added to the otherMetadata dictionary.

Here's an example:

<meta property="media:active-class">-epub-media-overlay-active</meta>
<meta name="media:active-class" content="text-highlight" />

See the decision in the last meeting minutes.

[qnga]

I'd been a bit confused by the meeting minutes about single and multiple values properties. As we generally don't know if a property is single value or multiple values, I guess the rule should be:

When an OPF contains both EPUB 2 (<meta name=>) and EPUB 3 (<meta property=>) meta tags for the same key, the EPUB 3 oneS should take precedence and the EPUB 2 oneS ignored.

[mickael-menu]

Yes that's the idea. I updated the OP.