It seems they specifically used the data-* attributes. These are already a thing in the HTML5 spec and can be used for personal use. That means there isn't rea

It seems they specifically used the data-* attributes. These are already a thing in the HTML5 spec and can be used for personal use. That means there isn't really much new for the clients/browsers to implement, except for the interpretation part. The parsing and DOM API already supports data attributes, so this spec only stands as a recommendation for content creators and screen readers to work with a officials standardized syntax. I'm actually surprised w3 didn't come with a completely new set of tags.