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   Re: [xml-dev] heritage (was Re: [xml-dev] SGML on the Web)

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Jeni Tennison wrote:

>>>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: 

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 Durusau
Director of Research and Development
Society of Biblical Literature


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