This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
If you're using Struts version 1.3 or above, the validator-rules.xml file is included in the struts-core-1.3.x.jar file, and should be referenced by the location '/org/apache/struts/validator/validator-rules.xml in your struts-config.xml file.
However, if you're using an earlier version of Struts, you should include the validator-rules file in your WEB-INF directory and reference it as /WEB-INF/validator-rules.xml.