Hi,
When you download
struts 1.1 from the jakarta site you will get both
validation-rules.xml(dtd also) file and validation_1_1.dtd file Since validation.xml file is the application specific i think we have to create the file and plug into the config file
Here is a simple example for validation.xml file
-----------------------------------------
<form-validation>
<global>
<constant>
<constant-name>phone</constant-name>
<constant-value>^\(? (\d{3}\)?[-| ]?(\d{4}$</constant-value>
</constant>
</global>
<formset>
<form name="chkoutForm">
<field property="phone"
depends="required, mask">
<msg name="mask" key="phone.invalidFormat"/>
<arg0 key="registrationForm.firstname.displayname"/>
<var>
<var-name>ask</var-name>
<var-value>${phone}</var-value>
</var>
</field>
</formset>
</form-validation>
---------------------------------------------
Configure the corresonding DTD file into this
If you have any doubt just go through jakarta.apache .org site. it is very useful .
All the best try this