True. But there are certain elements that vary greatly between specs (or rather, between spec and... suggested format?). For example, the `person` construct, th

True. But there are certain elements that vary greatly between specs (or rather, between spec and... suggested format?). For example, the `person` construct, the `text` construct, etc, which are rather inconsistent and flat in the RSS spec. If it were all fire–and–forget, I could rest at ease knowing it's a superset, but most differences are not additive.