[gyepi]

Hmm, I'd have to disagree with you on that. It is true that JSON processing could reduce raw scalalability in the sense that a query that uses JSON may be slower than one without. However, having JSON processing in the database simplifies quite a bit. For instance, imagine an app that processes and emits JSON and also uses a normalized database. This functionality now makes it possible to move some of the JSON processing closer to the database. In some cases, this may not be the best idea, and in others, it's a win. As with many things, having the choice is not the problem; it's how one chooses, given the choice. I can see the benefits of XML in the database, but I can also see how it could be misused. The key, as always, is to apply judicious thought to the problem.