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

Re: Regarding XSchema : Section 4.3.1

  • From: John Cowan <cowan@l...>
  • To: XML Dev <xml-dev@i...>
  • Date: Wed, 14 Oct 1998 11:31:26 -0400

Re: Regarding XSchema : Section 4.3.1
Amit Rekhi wrote:

> 
> *            The section 4.3.1 of the XSchema spec "Converting DTDs to
> XSchema Documents" states that Parameter entity declarations may be
> converted to parsed general entity declarations and use.
> 
>             If this were to happen then this means that the resulting
> XSchema would have a DTD (internal/external subset) which would house the
> converted parameter entity declarations as general entity declarations since
> XSchema does not give any construct for Parsed General Entity declarations.
>             Am I right?

Yes.

>             If we may transform parameter entity declarations (from a source
> DTD) into corresponding general parsed entity declarations (in the target
> XSchema),

Not in the XSchema as such, but in the *DTD* of the XSchema, presumably
though not necessarily in its internal subset.

> then why the restriction in case of general parsed entity
> declarations?

Because unless we are willing to abandon compatibility with XML 1.0 and
SGML entirely (and we, the XSchema team, are *not* willing), there is
no *point* in recording general parsed entities in the XSchema, since
by the time the XSchema is processed, basic XML processing has to have
already been done, including expanding entities.

It is simply not WF XML to have entity references to entities that don't
appear in the DTD of the document.  DTDs serve three functions: entity
declaration, attribute defaulting/rationalizing, and validation.  XSchema
handles the third and perhaps the second, but not the first.

The only reason to allow *unparsed* entities to be declared in XSchemas
is to validate ENTITY/ENTITIES attributes.

-- 
John Cowan	http://www.ccil.org/~cowan		cowan@c...
	You tollerday donsk?  N.  You tolkatiff scowegian?  Nn.
	You spigotty anglease?  Nnn.  You phonio saxo?  Nnnn.
		Clear all so!  'Tis a Jute.... (Finnegans Wake 16.5)

xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@i...
Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/
To (un)subscribe, mailto:majordomo@i... the following message;
(un)subscribe xml-dev
To subscribe to the digests, mailto:majordomo@i... the following message;
subscribe xml-dev-digest
List coordinator, Henry Rzepa (mailto:rzepa@i...)


PURCHASE STYLUS STUDIO ONLINE TODAY!

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.
Email
First Name
Last Name
Company
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.