> Their logic for developing the new language seems to be that XML
> is implicitly a tree-structured language, but they want to represent
> things that aren't most easily shown as trees, such as overlapping,
> parallel classifications of the same data.  Their examples 
> are the Bible,
> where you can have "chapters and verses" versus "sections and 
> paragraphs",
> and structures that represent edited text, where insertions 
> and deletions
> can easily overlap with any document-related structural elements.

You can do that in XML if you want. Perhaps not trivially, but you don't write that 
kind of stuff wihtout tools anyway.
> 
> > 2) The brackets don't appear to nest.
> 
> Oddly enough, I believe they do, but they've chosen syntax (as I
> understand it) that doesn't make it obvious, at least to my eye.
> Paraphrasing their examples a bit, the basic tagging seems to 
> go like this:

Well I disagree. (Who would have thought it!) I think nesting requires you to obey the 
conventional usage of brackets - opening and closing - and these examples surely don't 
do that for } and { (Sure they nesy in some way, but in the way that people would 
expect them to)

L.


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