Platinum Edition Using HTML 4, XML, and Java 1.2
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The XML Schema Complete Reference
Addison Wesley Professional, 26 September, 2002.

XML and Perl
Que, 16 October, 2002.

Flash and XML: A Developer's Guide
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Domino 5 Web Programming with XML, Java, and JavaScript
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The XML Companion (2nd Edition)
Addison-Wesley Pub Co, 15 January, 2000.

Early Adopter Curl
Wrox Press Inc, 15 September, 2001.

Interactive Programming on the Internet: Using Perl, CGI, ASP, PHP and XML
John Wiley & Sons, 24 March, 2003.

XML Processing with Perl, Python, and PHP
Sybex, 21 November, 2001.