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