| <?xml version="1.0" encoding="UTF-8"?> | 
| <ValidationRule xmlns="http://soap.sforce.com/2006/04/metadata"> | 
|     <fullName>Rental_Asset_SerialNumber_Validation</fullName> | 
|     <active>false</active> | 
|     <errorConditionFormula>DataMigration_Flag__c == false &&  | 
| NOT(ISBLANK(Rental_Asset_SerialNumber__c)) | 
| && (ISNEW() || ISCHANGED(Rental_Asset_SerialNumber__c)) | 
| && ( | 
|      LEFT(Rental_Asset_SerialNumber__c, 1) <> "," | 
|   || RIGHT(Rental_Asset_SerialNumber__c, 1) <> "," | 
|   || CONTAINS(Rental_Asset_SerialNumber__c, " ") | 
| )</errorConditionFormula> | 
|     <errorMessage>借出设备机身号码的前后需要「,」、同时不能有「空白」</errorMessage> | 
| </ValidationRule> |