Re: answers

> As long as you are using RELAX NG, you don't need to know anything
> about those geeky stuff. But yes, it does have several practical
> benefits.
...
> (2) It makes RELAX NG easier to harmonize with other spec.

I don't understand what you mean.

I think another important benefit is that it enables static analysis of
schemas: is anything allowed by one schema also allowed by another schema?

James