Online resources for XML certification - your opinions needed

I am maintaining XML links page and one problem is that I put there links that helped Me, Myself, Mapraputa exclusively. I have no idea how useful they are for other

Until we find some kind of voting mechanism, let's just use what we have - our forum. If some resource was particularly useful for you, say it here, or E-mail me. I'll update vote count and put your name, so you cannot vote twice

This way we can collect some statistics and finally have well-grounded, highly objective list of most useful certification resources.

To start:
Basic XML
W3School - very good tutorial, but only to start with
http://www.w3schools.com/xml/
For serious

studying:
Two commentaries on XML specification:
1. annotated XML specification by Tim Bray,
http://www.xml.com/axml/target.html
2. XML: The Annotated Specification
by Bob DuCharme.
Chapter 2 online:
http://www.snee.com/bob/xmlann/chap2.pdf
From Wendell Piez's Review:
"DuCharme's annotations can be usefully compared to those of Tim Bray, a co-editor of the specification, as they appear on the World Wide Web (at http://www.xml.com). Where Bray presents advice on how to go about reading and interpreting the specification (which sections are important, which need clarification, etc.), his annotations do not provide as much direct explanation as DuCharme's. (Where they do, they are effective and to the point, but as a whole they are necessarily more succinct for the web medium. They also have the advantage of hypertext links for relating parts of the spec to one another). DuCharme's notes are more extensive, more elementary, and probably of more direct help to the new user, giving more attention to the underlying concepts, for example, of element content modeling."
Specific issues:
Entities:
Norman Walsh. Entities: What are They Good For? (1 vote, Doug Wang)
http://www.xml.com/pub/a/98/08/xmlqna0.html?page=1
Short reference on syntax: (1 vote, Doug Wang)
http://xmlwriter.net/xml_guide/entity_declaration.shtml
More technical text (may be good for XML certification aspirants)
Pankaj Kamthan XML Entities and their Applications
(2 votes, Doug Wang, Anitha Lingam)
http://tech.irt.org/articles/js212/
XSLT
Zvon tutorials and examples (1 vote, Doug Wang)
http://www.zvon.org/xxl/XPathTutorial/General/examples.html
http://www.zvon.org/xxl/XSLTreference/Output/index.html
Jeni's XSLT pages:
http://www.jenitennison.com/xslt/index.html
XSLT Questions and Answers:
http://www.dpawson.co.uk/xsl/sect2/sect21.html
DTD
Structuring XML Documents, by David Megginson
CHAPTER 3: Ease of Learning
http://journal.iftech.com/books/9906_megginson_xml/
ZVON's DTD Tutorial
http://zvon.org/xxl/DTDTutorial/General/book.html
The Attribute/Text Conundrum
Document-Centric" vs. "Data-Centric"
http://www.xmleverywhere.com/newsletters/20000525.htm
DTD Design Tips
http://www.xmleverywhere.com/tips/designTips.html
Schema
"Understanding XML Schemas" by Norman Walsh
http://www.xml.com/pub/a/1999/07/schemas/index.html
XML Schemas: Best Practice (1 vote, Doug Wang)
http://www.xfront.com/BestPracticesHomepage.html
Describing your Data: DTDs and XML Schemas
by Simon St. Laurent
http://www.xml.com/pub/a/1999/12/dtd/index.html?wwwrrr_19991201.txt
XSD Schema Tricks and Tips by Kurt Cagle
http://www.vbxml.com/xml/articles/xsd/
Namespaces
XML Namespaces FAQ
http://www.rpbourret.com/xml/NamespacesFAQ.htm
ZVON's Namespace Tutorial : http://zvon.org/xxl/NamespaceTutorial/Output/index.html
Namespace Myths Exploded, by Ronald Bourret
http://www.xml.com/pub/a/2000/03/08/namespaces/
[ July 31, 2002: Message edited by: Mapraputa Is ]

SOAP and Web Services:
Programming Web Services with SOAP
By James Snell, Doug Tidwell & Pavel Kulchenko
Chapter 3. Writing SOAP Web Services
http://www.oreilly.com/catalog/progwebsoap/chapter/ch03.html
Web Services Essentials.
Distributed Applications with XML-RPC, SOAP, UDDI & WSDL
By Ethan Cerami
Chapter 6. WSDL Essentials
http://www.oreilly.com/catalog/webservess/chapter/ch06.html
Programming Web Services with XML-RPC
By Simon St.Laurent, Joe Johnston & Edd Dumbill
Chapter 3. Client-Server Communication: XML-RPC in Java
http://www.oreilly.com/catalog/progxmlrpc/chapter/ch03.html
Professional Java Server Programming, J2EE 1.3 Edition
By Subrahmanyam Allamaraju, Cedric Beust, John Davies et al.
Chapter 22. J2EE and Web services
ftp://www6.software.ibm.com/software/developer/library/j-j2eec22.pdf

To add to your collection:
IBM Test 141 info : http://www-1.ibm.com/certify/tests/info.shtml#141
XML@Whiz - http://www.whizlabs.com/proudcts/xmlwhiz/xmlwhiz.html
XML Gramps : http://www.javaranch.com/gramps/XMLLinks.jsp
Also there was another link on the top of this forum, which i dont see now.

For a tutorial designed for certification:
http://certificationguru.com/xmltutorial/index.html
For all sorts of XML resources and links:
http://www.xmlpitstop.com

Schema
-------
http://www.w3.org/TR/xmlschema-0/
http://www.xmlmag.com/upload/free/features/xml/2001/11nov01/wm0111/wm0111.asp
http://www.xml.com/lpt/a/2001/06/06/schemasimple.html
http://www.xml.com/lpt/a/2001/11/29/schemas/part1.html
http://www.ibiblio.org/xml/books/biblegold/chapters/ch24.html
XSLT
-----
http://www-106.ibm.com/developerworks/library/x-xslt/
http://www-106.ibm.com/developerworks/library/x-xslt2/
http://www-106.ibm.com/developerworks/library/x-xslt5.html
http://www.xml.com/lpt/a/2000/08/holman/index.html

http://www.xml.com/lpt/a/2000/08/holman/s1.html

Hey Thanks All,
A great noble work for all developers community. Keep up the good work.
Regards,
Mehul Jasani.

A very helpful link for XML and other standards
http://xml.coverpages.org/xmlIntro.html
http://xml.coverpages.org/xsl.html
XSL-FO Tutorial: http://www.renderx.com/tutorial.html
Regards,
Vasudha

Don't you feel that it is too confusing ... lots of link ....

Can any body please mention one or two best link for cirtification as well as knowledge perspective ...

Thanks a lot .