[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message]

Re: heritage (was Re: SGML on the Web)

Re:  heritage (was Re:  SGML on the Web)

Jeni Tennison wrote:

>Hi Patrick,
>>>I don't think that I do. I'm quite happy for XML to be interpreted
>>>as the Infoset, as the PSVI, as the XPath data model, as the DOM
>>>data model, as the LMNL data model, indeed as any data model anyone
>>>wants to use with it! XML is a syntax, that's all.
>>Sorry, that is simply not correct.
>>Underlying XML is a data model. That data model is set forth at:
>Ahh, I see. This must be the nub of our disagreement.
>The document that you quote is not a normative definition of XML.
>There are many normative definitions of data models for XML, including
>the Infoset and XPath.
And it is luck that they all follow a tree based model?

>It's a classic "chicken and egg" thing -- data models and syntaxes are
>intertwined -- but in this case, XML is defined as a syntax, which can
>have many data models; LMNL is defined as a data model, which can have
>many syntaxes.
And all those data models look a lot like trees?

>I don't know how to persuade you of this, but I see that Tim Bray's
>written a message that will hopefully help...
Probably time to end this particular thread. I was trying to convince 
you that if everything the W3C has done with XML looks like a tree, then 
it must have a tree model. I have failed in that attempt and don't 
really have any other evidence to offer. (I don't consider a plethora of 
tree based data models persuasive at all that XML has a one syntax and 
many data models.)

This is particularly important in light of your insistance that new 
models of XML must still comply with the well-formedness strictures of 
XML 1.0. You can have any model you like with XML, so long as it is tree 
based. (Or convert to some other model but I don't share your confidence 
in that strategy.) 

But, as Sam Hunting has recently pointed out, all XML processors save 
SAX, treat XML documents as trees with a single root, so call JITTs a 
challenge to implementations of a non-existent data model in XML.


>Jeni Tennison
>The xml-dev list is sponsored by XML.org <http://www.xml.org>, an
>initiative of OASIS <http://www.oasis-open.org>
>The list archives are at http://lists.xml.org/archives/xml-dev/
>To subscribe or unsubscribe from this list use the subscription
>manager: <http://lists.xml.org/ob/adm.pl>

Patrick Durusau
Director of Research and Development
Society of Biblical Literature


Purchasing Stylus Studio from our online shop is Easy, Secure and Value Priced!

Buy Stylus Studio Now

Download The World's Best XML IDE!

Accelerate XML development with our award-winning XML IDE - Download a free trial today!

Don't miss another message! Subscribe to this list today.
First Name
Last Name
Subscribe in XML format
RSS 2.0
Atom 0.3

Stylus Studio has published XML-DEV in RSS and ATOM formats, enabling users to easily subcribe to the list from their preferred news reader application.

Stylus Studio Sponsored Links are added links designed to provide related and additional information to the visitors of this website. they were not included by the author in the initial post. To view the content without the Sponsor Links please click here.

Site Map | Privacy Policy | Terms of Use | Trademarks
Free Stylus Studio XML Training:
W3C Member
Stylus Studio® and DataDirect XQuery ™are products from DataDirect Technologies, is a registered trademark of Progress Software Corporation, in the U.S. and other countries. © 2004-2013 All Rights Reserved.