DOM Level 2 Core Specification, November 13, 2000, by the World Wide Web Consortium. Available online at http://www.w3.org/DOM/DOMTR#dom2.
DOM Reference, Microsoft XML Core Services (MSXML) 4.0, by Microsoft Corporation. Online documentation included as part of the MSXML SDK. Available online at http://msdn.microsoft.com/xml.
Java API for XML Processing Specification 1.2, by Sun Microsystems. Online Javadoc documentation, included as part of the Java XML Pack Spring 2002. Available online at http://java.sun.com/xml.