The following are some suggested supplemental references to further your retraining effort.
.NET Magazine:
http://www.fawcette.com/dotnetmag/
MSDN Magazine, "A Quick Guide to XML Schema, Part 1":
http://msdn.microsoft.com/msdnmag/issues/02/04/xml/xml0204.asp
MSDN Magazine, "A Quick Guide to XML Schema, Part 2":
http://msdn.microsoft.com/msdnmag/issues/02/07/XMLFiles/default.asp
MSDN Magazine, article index for the "XML Files" series of articles:
http://msdn.microsoft.com/msdnmag/find/default.aspx?type=Ti&phrase=XML%20Files:
MSDN Magazine, "Run-time Serialization":
http://msdn.microsoft.com/msdnmag/issues/02/04/net/net0204.asp
Visual Studio Magazine:
http://www.fawcette.com/vsm/
XML & Web Services Magazine:
http://www.fawcette.com/xmlmag/
Microsoft Community (discussion groups, e-newsletters, and so forth):
http://communities2.microsoft.com/
MSDN:
http://msdn.microsoft.com
Roadmap for XML in the .NET Framework:
http://support.microsoft.com/default.aspx?scid=kb;[LN];Q314150
Roadmap for XML Serialization in the .NET Framework:
http://support.microsoft.com/default.aspx?scid=kb;[LN];Q314150
SQLXML and XML Mapping Technologies (includes a link to the free SQLXML 3.0 SP1 download):
http://msdn.microsoft.com/sqlxml
A Survey of Microsoft SQL Server 2000 XML Features:
http://msdn.microsoft.com/library/en-us/dnexxml/html/xml07162001.asp
Visual Studio .NET's XML Designer:
http://msdn.microsoft.com/library/en-us/vsintro7/html/vburfXMLSchemaDesigner.asp
W3C Extensible Markup Language (XML):
http://www.w3.org/XML/
XML Core:
http://www.msdn.microsoft.com/xml
XML Information Set (Infoset) Recommendation:
http://www.w3.org/TR/xml-infoset/
XML Schema Part 0: Primer (includes links to Part 1: Structures and Part 2: Datatypes):
http://www.w3.org/TR/xmlschema-0/
XML Tutorial:
http://msdn.microsoft.com/library/en-us/xmlsdk30/htm/xmtutxmltutorial.asp