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

Parameter entity reference error with expat

  • From: David Megginson <david@m...>
  • To: "XML Developers' List" <xml-dev@i...>
  • Date: Tue, 14 Jul 1998 21:10:53 -0400

reference error
Steve Harris writes:

 > I'm working out a small DTD by inlining it with some sample data. It
 > uses a single internal parameter entity and refers to the entity twice
 > in the DTD. Emacs's 'psgml' seems to validate and do all the
 > substitutions as expected. If I run the file through expat, though, it
 > reports the following error:
 > 	illegal parameter entity reference

You've run up against a somewhat obscure constraint from section 2.8
of the XML 1.0 Recommendation:

  Well-Formedness Constraint: PEs in Internal Subset

  In the internal DTD subset, parameter-entity references can occur
  only where markup declarations can occur, not within markup
  declarations. (This does not apply to references that occur in
  external parameter entities or to the external subset.)

  Source: http://www.w3.org/TR/1998/REC-xml-19980210#sec-prolog-dtd

As a result, the following is legal in an _external_ DTD subset, but
not in an internal one:

  <!ENTITY % my-atts "id ID #REQUIRED
                      role CDATA #IMPLIED">

  <!ELEMENT foo (#PCDATA)>
  <!ATTLIST foo
    %my-atts;>

PSGML doesn't catch this one yet.


All the best,


David

-- 
David Megginson                 david@m...
           http://www.megginson.com/

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.