RE: About XML to multiple language/multiple outputs

["Frank A. Christoph" <christo@xxxxxxxxxxxxxxxxxx>]

> > > No need to do anything here, query is already universal.
> >
> > Maybe semantically, but not in practice. I meant something
> along the lines
> > of how natural numbers can be encoded as lambda-functions
> (Church numerals),
> > or derived expressions in Scheme can be defined by macro definitions. In
> > other words, the equivalence should expressible in the language itself.
> >
>
> This would be possible with the R5RS macro system, or am I overlooking
> something ? Maybe getting the priorities right would be a little tricky.

My point is really whether or not there exists a sound translation at all,
not how its implemented. One sticking point here is the specificity. For
example, a query rule is always more specific than an element rule. In
particular, a query rule with priority 0 is more specific than any element
rule. So what priority do you assign to the translation of an element rule?

--FC


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