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- From: "Steven R. Newcomb" <firstname.lastname@example.org>
- To: email@example.com
- Date: Tue, 1 Jun 1999 16:02:00 -0500
> What exactly are "groves"?
> The clearest def I could get of them...
> Groves are the abstract representation of an underlying notation and the
> in-memory realisation is constructed using a notation processor, for example
> the grove for an SGML instance is built by the SGML notation processor.
> Now up until the last bit this sounds like DOM. Are groves just an object
> Oh and if anybody reading this is responsible for writting HyTime
> documentation... come the revolution you'll be among the first put against
> the wall and shot!... right after those people at the ISO.
I'll try to remember to bring two blindfolds for myself, one for each
of my well-deserved executions.
Yes, the grove paradigm is an object model, while the DOM is not an
object model, despite its name. If the DOM had been rigorously built
on a formal definition of the information set of XML, then a document
that was accessed via the DOM would be a grove.
I'll try this another way:
Assuming that we have a grove of an XML document, putting a
DOM-conforming API layer over it is a trivial matter.
And a third way:
The DOM is only for XML. Groves, on the other hand, can be built
according to any valid property set, not just the XML property set.
Making everything accessible as a grove makes everything addressable,
which is the secret of HyTime's claim that, via the grove paradigm,
everything, anywhere, anytime, is addressable in any convenient terms.
The "convenient terms" are selected when the property set is written.
If anybody really wants to understand groves at a visceral level, they
should ask me for a copy of the GroveMinder demo.
Steven R. Newcomb, President, TechnoTeacher, Inc.
firstname.lastname@example.org http://www.techno.com ftp.techno.com
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