The short-circuit attribute was introduced in the XWork Validator 1.0.2 release. If the framework complains that the "Attribute 'short-circuit' must be declared for element type 'field-validator'", update the configuration file's DTD reference.

<!DOCTYPE validators PUBLIC
 "-//OpenSymphony Group//XWork Validator 1.0.2//EN"
  "http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd">