Update media overlays semantics - Githubissues

IDPF / epub-vocabs

EPUB Vocabularies

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Update media overlays semantics #5

Closed mattgarrish closed 5 years ago

mattgarrish commented 5 years ago

This PR addresses the issues raised in https://github.com/w3c/publ-epub-revision/issues/1222 and https://github.com/w3c/publ-epub-revision/issues/1226 as follows:

adds an aside semantic for media overlays use
change html usage contexts for media overlays semantics from 'deprecated' to 'not allowed'
clarifies the distinction between deprecated semantics and deprecated usage contexts