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   Re: document vs non-document entity (was Re: CORBA's not boring yet. / X

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  • From: "Simon St.Laurent" <simonstl@simonstl.com>
  • To: <xml-dev@ic.ac.uk>
  • Date: Sun, 07 Feb 1999 08:41:50 -0500

At 06:38 PM 2/7/99 +0800, James Tauber wrote:
>One (serious) issue that imediately arises out of my XML überdocument system
>is that there is a difference in XML between the document entity and other
>entities: the existence of the prolog.
>If an XML document has a empty prolog, there is no problem because an XML
>document entity with an empty prolog is a legal external parsed entity.
>However, the moment you have an XML declaration or document type
>declaration, the entity can no longer act as an external parsed entity.

I like the uberdocument OS concept very much (as those who suspect my
XML-everywhere sympathies probably guessed.)  The doctype declaration issue
is a significant problem for a single-document model.  I think there may be
two ways out, however:

1) Hope that the schema spec uses some other mechanism to connect to
documents (and document fragments) that isn't as disruptive.

2) Use a master document that has connections to other documents, using
XLink to manage relationships within the set of documents.  This way you
can have all the prologs and DTDs you like, though you'd need another level
of organization.

Hmmm... fun idea!  I've been thinking a lot about XML as resource files,
which is where the thoughts above came from, but you've gone a few orders
of magnitude past that.

Simon St.Laurent
XML: A Primer / Building XML Applications (March)
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