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RE: syntax, model


formal prose

> > And I'd rather have a spec written in prose than a schema any
> day of the week
> > .
>
> Having all three is best (formal spec, prose spec, and sample
> instances), if they're all available.  But I think I'd still
> pick the formal spec if I were forced to choose just one.

Ditto. You can to some extent generate a formal spec from a prose spec and
vice versa, but where the formal-> prose may be lacking in higher level
semantics it's less likely to be *wrong*.

> There's an issue of quality, too.  A prose spec written by, say,
> James Clark, is often sufficient, whereas one written by, say,
> Dave Winer may not be any more informative than the collection
> of sample instances.

I've recently being trying to deal with data that uses one of Mr. Winer's
specs [1]. Wayne Steele has generated a DTD from the prose, which is linked
from the spec. The DTD contains the comment:

"You can add whatever other attributes on the outline element you want."

> With a formal notation, you can usually count on at least _some_
> degree of precision.

Exactly.

Cheers,
Danny.

[1] http://www.opml.org/spec
[2] http://static.userland.com/gems/radiodiscuss/opmlDtd.txt


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