XML in a Nutshell - Elliotte Rusty Harold; W. Scott Means (O'Reilly, 2001)

XML in a nutshell - covers XML schema: a desktop quick reference (2. ed.). - Elliotte Rusty Harold; W. Scott Means (O'Reilly, 2002)

XML in a nutshell - a desktop quick reference: covers XML 1.1. and XInclude (3. ed.). - Elliotte Rusty Harold; W. Scott Means (O'Reilly, 2004)