How do embed carriage return/new line into the data?
fscheng at netzero.net
Thu Dec 2 17:27:38 GMT 1999
I'm fairly new to this community. Please help me answer this very simple
----- Original Message -----
From: "David Megginson" <david at megginson.com>
To: <xml-dev at ic.ac.uk>
Sent: Thursday, December 02, 1999 8:39 AM
Subject: Re: Object-oriented serialization (Was Re: Some questions)
> Matthew Gertner <matthew at praxis.cz> writes:
> > A schema gives you this information too. The problem of how to attach a
> > schema to an instance is not yet resolved, but it is a purely syntactic
> > consideration and a satisfactory solution will be found. This then tells
> > you what class a given instance belongs too. The identity can be
> > specified using an ID attribute; this is exactly the way it is done in
> > RDF. That an element represents a relationship is implicit in the
> > content model of the element.
> I still don't follow. Perhaps I need to reread the XML Schema spec,
> but given
> <bar id="xxx">
> How does the schema tell me that foo represents a container for a
> collection of objects, bar represents an object, and hack and flurb
> represent the object's properties?
> > SAX is great as far as it goes, but we seem to be agreeing that an
> > additional layer is needed on top. This layer is not the DOM.
> It can be. The DOM represents a domain-specific object layer that is
> useful for a wide subset of XML operations (especially document- and
> browser-oriented work). There need to be many layers on top of XML,
> one for each domain -- it happens that many of those layers will share
> the need to encode objects, so a standard object layer sandwiched
> between XML and the domain-specific layers can save a lot of work.
> > There are a variety of efforts to create
> > domain-specific objects automatically from XML objects. I don't have a
> > list at the tips of my fingers, but if anyone does it would be a great
> > resource. They are out there because I keep bumping into them.
> One example is RDF.
> > To be quite blunt it seems ashame that a lot of really great work is
> > being put into the RDF effort (including a very valuable vocabulary
> > for collection classes, just to name one) instead of being
> > integrated more tightly into the overall XML architecture.
> I disagree strongly with the last part of that statement. I'd argue
> the opposite -- higher-level layers should be as independent of XML as
> possible. That's the only way to build good, layered architectures.
> XML does one thing (represent a tree structure in a character stream)
> very well: it's an excellent layer to build other layers on top of,
> but XML itself should stay as simple as possible so that it's
> applicable widely to many different fields.
> > I think that if the work being done on RDF were refocused to making
> > sure that XML Schemas do everything that the RDF advocates are
> > rightly claiming is necessary, that we will see a clear win in terms
> > of pushing the whole XML effort from a theoretical effort into a
> > major paradigm shift with extensive real-world implications.
> That would be another serious mistake. Object exchange, while
> important, represents only one of many layers that can be build on top
> of XML, and if XML Schemas start trying to solve high-level problems
> for every specific domain, it will become an unimplementable mess.
> RDF already made a similar mistake by mixing together a spec for
> object encoding in XML with a spec for representing knowledge about
> Web pages.
> All the best,
> David Megginson david at megginson.com
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