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Re: Layering (was RE: Blueberry/Unicode/XML)

• From: Rick Jelliffe <ricko@a...>
• To: xml-dev@l...
• Date: Tue, 10 Jul 2001 23:43:30 +0800

From: "Leigh Dodds" <ldodds@i...>

> Has anyone ever documented what these separate layers are?
> Or possibly identified in which 'layer' particular XML
> requirements/constraint
> lie?

For a 16-layer! characterization of XML and layering, see my article
"Goldilocks and XML"  at
http://www.xml.com/pub/a/1999/12/sml/goldilocks.html

> Is it possible to write an efficient layered parser in this way?

The lesson of the ISO OSI layered model is that one must be 
very careful to distinguish analytical layers from implemented
layers.  The approach of keeping each layer as thin as possible
is not always a good idea, though one man's thinness may be
another man's spaghetti.

Cheers
Rick Jelliffe

• References:
  • Layering (was RE: Blueberry/Unicode/XML)
    • From: Leigh Dodds <ldodds@i...>

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