Namespace URI address resources

Rick Jelliffe ricko at
Thu Jun 17 16:25:39 BST 1999

From: Mark Birbeck <Mark.Birbeck at>

>Rick Jelliffe wrote:
>> A schema is "processing" not "data": it is tied to whatever
>> applications
>> understand the schema format. Editing, creating and
>> validating against a
>> schema are all applications.
> As far as I can see, one point of the schema proposal is to
>be functionally equivalent to a DTD with a few obvious advantages, one
>of these being that if we get the definition right, each node can
>specify its own schema.

What you gain on the swing you lose on the roundabout. I have been using
Adobe's EDD system for several years for defining document structures:
it allows syntax directed editing of the schema, tree views, rich text
comments, nicely formatted direct export to HTML and PDF,  linking to
styles, pre- text and post-text and hard coding of flow objects (if you
want).  I like it, but I still prefer DTDs.

The XML Schema Structure draft was disappointing to me: DTD syntax is
given a great leap forward (i.e., superficial but nice)  from 70's
syntax (macros) to 80's syntax (objects) and a couple of things from
HyTime get twisted and added like a balloon poodle.

Rick Jelliffe

xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev at
Archived as: and on CD-ROM/ISBN 981-02-3594-1
To (un)subscribe, mailto:majordomo at the following message;
(un)subscribe xml-dev
To subscribe to the digests, mailto:majordomo at the following message;
subscribe xml-dev-digest
List coordinator, Henry Rzepa (mailto:rzepa at

More information about the Xml-dev mailing list