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


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

Jeni Tennison wrote:

>Patrick,
>
>>>I'm just trying to persuade Patrick not to use a syntax that's
>>>similar-enough-to-XML-to-be-confusing as the input to his processes
>>>in the examples that he uses.
>>>
>>In my defense, I am trying to persuade Jeni to not see a data model
>>as a limitation on a particular serialization syntax.
>>
>
>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: 
http://www.w3.org/XML/Datamodel.html

It is not happenstance that all of the "data models" that you cite, 
PSVI, XPath, DOM, are based on the presumption of a tree. The tree model 
underlies all those "data models" and its presence was not a matter of 
chance (or choice). (LMNL does not use that model but then it is not a 
XML data model. It is a data model that can model documents based on the 
XML data model.)

>
>>As I said, yesterday and I suppose it bears repeating, JITTs can use
>>standard, valid, well-formed XML documents and syntax for many
>>things. It can also use XML syntax that violates the XML data model
>>but I fail to see why that is confusing?
>>
>
>I'm not sure what you mean by "XML syntax that violates the XML data
>model". There is no *the* XML data model -- XML is just a syntax. But
>there are very clear rules about that syntax -- the well-formedness
>rules. My point is that if a document breaks those well-formedness
>rules then it isn't in XML syntax. It's confusing to label documents
>that aren't well-formed XML as "using XML syntax".
>
I think we need to reach some agreement on the question of the "data 
model" of XML. I think the URL I cite above makes my answer to that 
question fairly clear. Do you have another interpretation of what is 
stated there?

Patrick

-- 
Patrick Durusau
Director of Research and Development
Society of Biblical Literature
pdurusau@e...




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