OASIS Mailing List ArchivesView the OASIS mailing list archive below
or browse/search using MarkMail.


Help: OASIS Mailing Lists Help | MarkMail Help



   RE: [xml-dev] abstract types

[ Lists Home | Date Index | Thread Index ]
  • To: "Maciejewski, Thomas" <Thomas.Maciejewski@lehman.com>,<xml-dev@lists.xml.org>
  • Subject: RE: [xml-dev] abstract types
  • From: "CHIUSANO, Joseph" <JCHIUSANO@lmi.org>
  • Date: Wed, 11 Sep 2002 11:08:58 -0400
  • Disposition-notification-to: "CHIUSANO, Joseph" <JCHIUSANO@lmi.org>
  • Thread-index: AcJZo+97WlE3d8XwQXylYTYE7Q6twQAAMhPw
  • Thread-topic: [xml-dev] abstract types


W3C Schema contains a feature called Abstract Datatypes that I believe may be useful to you.  In a nutshell, abstract datatypes are complex datatypes that act as "templates" from which other complex datatypes are derived.  However, unlike base datatypes, abstract datatypes cannot be used directly in element declaration (i.e. you can declare an element to be of a type that is derived from the abstract datatype, but not of the abstract datatype itself).  

More info in section 4.7 of the W3C Schema Primer:


Kind Regards,
Joe Chiusano

> **************************************************************************
>   Joseph M. Chiusano
>   Logistics Management Institute
>   2000 Corporate Ridge
>   McLean, VA 22102
>   Email: jchiusano@lmi.org
>   Tel: 571.633.7722
> **************************************************************************

-----Original Message-----
From: Maciejewski, Thomas [mailto:Thomas.Maciejewski@lehman.com]
Sent: Wednesday, September 11, 2002 10:59 AM
To: 'xml-dev@lists.xml.org'
Subject: [xml-dev] abstract types

Is there a way to enforce abstract types.  For example lets say I have an
interface : printable  

but then I have a concrete "class" wordDocument that derives from printable
with some additional information.  Lets say I would like to serialize these
objects to XML.  Lets say I also have a class queue that can have many
"printable" objects ... 

so in my xml I would like to have :

	<wordDocument name="toms document" />
	<excelDocument name="toms spreadsheet" />

but not allow:
	<printable />

we may assume that there actually is more data in these elements 

what is the best way to do this in XML?

This message is intended only for the personal and confidential use of the designated recipient(s) named above.  If you are not the intended recipient of this message you are hereby notified that any review, dissemination, distribution or copying of this message is strictly prohibited.  This communication is for information purposes only and should not be regarded as an offer to sell or as a solicitation of an offer to buy any financial product, an official confirmation of any transaction, or as an official statement of Lehman Brothers.  Email transmission cannot be guaranteed to be secure or error-free.  Therefore, we do not represent that this information is complete or accurate and it should not be relied upon as such.  All information is subject to change without notice.

The xml-dev list is sponsored by XML.org <http://www.xml.org>, an
initiative of OASIS <http://www.oasis-open.org>

The list archives are at http://lists.xml.org/archives/xml-dev/

To subscribe or unsubscribe from this list use the subscription
manager: <http://lists.xml.org/ob/adm.pl>


News | XML in Industry | Calendar | XML Registry
Marketplace | Resources | MyXML.org | Sponsors | Privacy Statement

Copyright 2001 XML.org. This site is hosted by OASIS