I'm in the process of revamping this site by topic, but in the meantime, here are a number of tutorials I've written for IBM's developerWorks.

XML Tutorials

Understanding DOM
Even before there was XML, there was the Document Object Model (DOM). The DOM allows a developer to refer to, retrieve, and change items within an XML structure, and is essential to working with XML. In this tutorial, you will learn about the structure of a DOM document. You will also learn how to use Java to create a document from an XML file, make changes to it, and retrieve the output. (2001 Aug. 31)

Understanding SAX
This tutorial examines the use of the Simple API for XML version 2.0, or SAX 2.0. It is aimed at developers who have an understanding of XML and wish to learn this lightweight, event-based API for working with XML data. It assumes that you are familiar with concepts such as well-formedness and the tag-like nature of an XML document. In this tutorial, you will learn how to use SAX to retrieve, manipulate, and output XML data. (2001 Sept. 05)

Validating XML
This tutorial examines the validation of XML documents using either Document Type Definitions (DTDs) or XML Schema. It is aimed at developers who have a need to control the types and content of the data in their XML documents. (2001 Sept. 25)

Create multi-purpose Web content with XSLT
As more and more devices become Web enabled, it is crucial that your content be available in multiple forms, such as traditional Web pages, mobile phones or other small devices, or Web services. This tutorial shows you how to set up a Java servlet that detects the type of display that is necessary and automatically produces appropriate markup for the content that uses XSLT. (2003 March 18)

Using JDBC to insert data from XML into a database
This tutorial is designed to assist Java developers who need to extract information from an XML document and enter it into a database. (2001 Oct. 03)

Using JDBC to extract data into XML
This tutorial is designed to assist Java developers who need to extract information from a database and place it into an XML document. (2001 Sept. 28)

Understanding XForms
Today's Web applications require sophisticated control over a form's presentation and over the data that is ultimately submitted. XForms, currently at the level of Candidate Recommendation status at the W3C, aims to satisfy those needs, including separating functionality from presentation and streamlining validation and events processing. (2002 Dec. 23)

Install and configure Xalan-Java
This new tutorial by author Nicholas Chase tells step-by-step how to install, configure, and test the Xalan-Java XSL Transformation processor. Installing Xalan-J involves preparing the environment by obtaining an appropriate Java Virtual Machine, setting environment variables, and installing the files. After installation, you can set other environment variables, such as CLASSPATH. (2002 Nov. 26)

Install and configure the Xerces2 Java parser
The first step in working with XML is parsing the data into a workable form. This tutorial guides you through the steps necessary to install and configure the Xerces2 Java parser. (2002 Nov. 20)

XML Schema validation in Xerces-Java 2
XML Schema provides validation capabilities that weren't available with Document Type Definitions. Xerces-Java 2.0 provides virtually complete support for the W3C's XML Schemas, and beyond. This tutorial guides you through the process of using schema validation with Xerces-Java 2.0. (2002 July 16)

Manipulating data with XSL
This tutorial explains the basics of retrieving data from a database into a DOM document, transforming the DOM document into a second document, and inserting the data from the second document into the database using updatable ResultSets in Java. (Though the examples are all written in Java, the concepts are the same in any programming language and the tutorial can assist any developer who wants to learn how to manipulate data with XSLT.) Several of the more advanced features of XSLT and XPath are covered, demonstrating some of the ways that XSLT style sheets can be used to emulate the programming capabilities of database stored procedures. (2001 Oct. 24)

Modularization of XHTML
This tutorial is designed for users who need to understand the modularization of XHTML, either to use a subset of XHTML, or to add their own tags to create their own markup language variants. (2001 Oct. 23)

Developing XSL Transformations with WebSphere Studio
This tutorial shows you how to use the Site Developer configuration of WebSphere Studio to map the elements and attributes of one XML structure to the elements and attributes of another, then convert that mapping to an XSLT style sheet. The tutorial will demonstrate how to use an XSL Trace facility to watch the actual progress of the transformation and locate errors. This tutorial will also cover how to add XSLT functions, external JavaScript functions, and Java classes to the style sheet. (2002 April 17)

Manipulating XML and SQL data with WebSphere Studio
This tutorial covers the basics of XML development with WebSphere Studio Site Developer, including how to create and edit new XML files, how to generate DTDs or XML Schemas from an existing XML file, and how to generate an XML file from an existing DTD or schema. The tutorial also looks at the relationship between XML and databases by examining Site Developer's applicable features in this area, including its ability to generate XML files from SQL statements and create mappings of XML data to a relational database structure for use by other applications such as application servers. (2002 April 10)

Introduction to Scalable Vector Graphics
Scalable Vector Graphics (SVG) makes it possible to specify, using text, graphical images that appear on a Web page. The advantages are many, including the ability to easily generate graphics (such as graphs and charts) from database information, and the ability to add animation and interactivity to graphics. This tutorial demonstrates the concepts necessary for building SVG documents, such as basic shapes, paths, text, and painting models, and also animation and scripting. (2002 Feb. 20)

Process XML using XML Query
For years developers have been using SQL to retrieve data from structured sources such as relational databases. But what about unstructured and semi-structured sources, such as XML data? To be viable as a data source, XML needed a means for conveniently retrieving the data. XQuery provides this means, allowing developers to write a statement that both extracts data and (if necessary) structures the results as XML. This tutorial shows you how to use XQuery to retrieve information from an XML file. It also explains the ways in which XPath changes with version 2.0, and what those changes mean for data management. (2002 Sept. 24)

Web Services Tutorials

Introduction to ebXML
Whereas EDI for years has provided a usable but expensive way for companies to exchange information in an automated manner, ebXML now provides a means for companies to integrate their processes much more easily. Based on XML, it provides a methodology for business to determine what information they should exchange and how, as well as a set of specifications to allow automation of the process. This tutorial gives an overview of ebXML, explaining how all of the pieces fit together. (2002 June 11)

Building Web service applications with the Google API
The Google search engine can now be accessed via a SOAP-based Web service. This means that developers can now embed Google search results and other information into their own applications. Google also took this project one step further, creating an API and Java toolkit for accessing the data. This tutorial is for developers who want to use Google information from within their Java applications. (2002 May 21)

Building an Amazon storefront using SOAP and the WSDK
This tutorial is for developers who want to use SOAP to access the Amazon product database through Amazon Web Services (AWS). It shows you how to use the IBM WebSphere SDK for Web Services (WSDK) to create Java classes from the Amazon Web Services Description Language (WSDL) file, demonstrates the use of those classes, and then examines the process of using the WSDK to turn the classes into a Web application and Amazon storefront. (2002 Nov. 01)

Integrating applications with Web services using WebSphere
The Site Developer configuration of WebSphere Studio and WebSphere Application Server ease the pain of integrating Web services with your application. This tutorial looks at making your application Web services-ready using Site Developer's tools. It takes you through the process of wrapping an existing application as a Web service, announcing it using a UDDI directory, and discovering and using Web services within your applications. It also looks at how to deploy your application to a WebSphere Application Server. (2002 June 19)

Integrating applications with Web services using WebSphere Studio V5
This tutorial shows you how to make your application Web-services ready using the tools in WebSphere Studio Application Developer Version 5. You will learn how to wrap an existing application as a Web service and announce it using a UDDI directory and to discover and use Web services within your applications. The tutorial also explains how to deploy your application to a WebSphere Application Server. (2003 Feb. 06)

Making of MetroSphere, Part 5: Installing WebSphere Portal Express
The first step in the MetroSphere project is getting the software installed so we can start working with it. This tutorial explains the necessary hardware and software prerequisites for installing WebSphere Portal - Express, and then explains the information necessary for a Quick Install and describes how that process should work. It also looks at some of the additional information necessary for a Standard Install. (2003 Feb. 24)

Building database applications with WebSphere and DB2
One common use for Web services is the enabling of remote access to DB2 database information. Using parts of a simple commodity trading system, this tutorial teaches you how to select from, insert into, and update a DB2 database from WebSphere Studio and from a Java application. You will then convert this application to a Web service with the help of WebSphere Studio. The tutorial also discusses DB2 user-defined functions and stored procedures. (2002 Sept. 05)

Web authoring and JavaScript tutorials

Understanding dynamic positioning
This tutorial is designed to assist Web developers who need tight control over the placement of content on their pages, but who understand the need to separate content from presentation in order to improve compliance with standards and ease of maintenance. (2001 Nov. 13)

JavaScript floating objects
This tutorial is targeted at Web developers who want to create objects, such as images and menus, that hold their place (or float) in the browser window even when the user scrolls or resizes the window. (2001 Dec. 20)

Creating and using JavaScript objects
This tutorial is for programmers who wish to take advantage of object oriented programming (OOP) using JavaScript -- either within the browser or on the server side -- by using custom-built JavaScript objects and their properties and methods. (2001 Nov. 27)

MetroSphere Tutorials

Making of MetroSphere, Part 12: Hands-on JSP technology intro: Creating a community weblog
This tutorial is for developers who want to learn more about using JavaServer Pages (JSP) technology to build applications. It discusses the basics of JSP components in general, their integration with JavaBeans, and the creation and use of custom tag libraries. (2003 June 05)

Making of MetroSphere, Part 6: Getting started with WebSphere Portal - Express
This tutorial is for developers and administrators who want to get familiar with WebSphere Portal in general, and WebSphere Portal - Express in particular. It explains basic concepts such as portlet use and administration, user administration, and the basics of creating portal pages. (2003 April 04)