The error code that is associated with this validation rule. Usually this code will be resolved to a real message using a resource bundle A default error message to be used when the error code cannot be resolved A comma-separated list of arguments to be used along with the error code A condition expression that determines when/whether this rule should be applied on the bean. A comma-separated list of validation context tokens this rule is associated with The scope of a expression. Can be either global or property . A validation rule that checks that the length of a String property is between specific bounds. A validation rule that checks that a collection or an array property is not empty. Specifies a org.springframework.validation.Validator class to be used in the validation process Specifies the name of the org.springframework.validation.Validator bean by which it's deployed in the spring application context