[csuwldcat]

You're overlooking that the underlying technology - Web Components - is landing as a standard as we speak in both Firefox and Chrome. The idea that creating custom elements is inherently bad is an urban legend - there is no empirical basis for such a claim. Additionally, you are mixing metaphors, Custom Elements are not meant to describe data, they are meant to create new, active UI components and other useful tags.

[spankalee]

Well, you could use such tags to describe data directly in the markup. I'll think we'll see two definite camps on that issue. Of course, what's data?