I wonder ...

DuCharme, Robert DuCharmR at moodys.com
Tue Mar 2 19:39:08 GMT 1999

>I'd like to reuse book.dtd inside library.dtd without rewriting 
>whole library.dtd.

(First, this is really a question for the xml-l list or comp.text.xml.
xml-dev is for people developing XML software.)

This is what external parameter entities are for. Parameter entities
store pieces of a DTD, and "external" means "stored in a separate file"
(or the equivalent construct in your operation system). For example, if
book.dtd is the following:

  <!ELEMENT book (chapter+)>
  <!ELEMENT chapter (par+)>
  <!ELEMENT par (#PCDATA)>

your library.dtd file could look like this:   

  <!ELEMENT library (shelf+)>
  <!ELEMENT shelf (book+)>
  <!ENTITY % bookdtd "book.dtd">

Bob DuCharme       www.snee.com/bob       <bob@  
snee.com>  see www.snee.com/bob/xmlann for "XML:
The Annotated Specification" from Prentice Hall.

xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev at ic.ac.uk
Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ and on CD-ROM/ISBN 981-02-3594-1
To (un)subscribe, mailto:majordomo at ic.ac.uk the following message;
(un)subscribe xml-dev
To subscribe to the digests, mailto:majordomo at ic.ac.uk the following message;
subscribe xml-dev-digest
List coordinator, Henry Rzepa (mailto:rzepa at ic.ac.uk)

More information about the Xml-dev mailing list