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- From: <Marc.McDonald@Design-Intelligence.com>
- To: <email@example.com>, <firstname.lastname@example.org>
- Date: Mon, 15 Mar 1999 14:44:17 -0800
I mean representation in the sense of some data structure representing
the document. Perhaps using a book as the example gave the wrong
connotation. If it were some kind of purchase order, the application
that is using the parser would create some representation of the
information - typically a tree of object representing the elements but
not required to be so.
I look at it as not only using XML to represent documents that are
rendered via a style sheet, but also information or data in the more
general sense which may be delivered a specific application. Moving
the information from an XML tree in DOM to whatever form the
application uses for the information represents another 'parser'.
Marc B McDonald
Principal Software Scientist
Design Intelligence, Inc
From: Didier PH Martin [SMTP:email@example.com]
Sent: Friday, March 12, 1999 8:38 PM
To: Marc McDonald; firstname.lastname@example.org
Subject: RE: FW: Namespaces and DTDs
It's quite true that you can have XML that does not require validation
and that this is commonly done. An exception is the defaulting of the
value of any attributes of elements in a DTD, which has been mentioned
in another reply.
You can construct a DOM without validation, but the next step ends up
being a procedural implementation of picking apart the DOM document
tree to construct whatever structure the application using DOM
requires to interpret the document.
I can parse:
<book title="tale of 2 cities">
without a DTD.
But if my application needs to get the information out of the DOM I
need to write code to:
Create a representation for Book consisting of a title and chapters
and get book from DOM
Create a representation for each Chapter and get Chapters from DOM
Create a representation for each paragraph in a chapter and get
paragraphs from DOM.
Part of this is what is expressed in the DTD. Wouldn't it be better if
a system were created that used the DTD on the receiving end to create
the application representation instead of serializing it back into
elements and constructing a new tree?
a) what do mean by " a representation" is it a rendition object?
Didier PH Martin
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