| <?xml version="1.0" encoding="UTF-8"?> | 
| <ValidationRule xmlns="http://soap.sforce.com/2006/04/metadata"> | 
|     <fullName>CampaignShow_Can_Not_Change</fullName> | 
|     <active>true</active> | 
|     <errorConditionFormula>InputCheck__c | 
| && TEXT(Consum_Apply__r.demo_purpose2__c) != '学会展会' | 
| && ISCHANGED(Show_demonstration__c)</errorConditionFormula> | 
|     <errorMessage>非学会展会目不能修改展示/演示</errorMessage> | 
| </ValidationRule> |