IBR-002
An Invoice MUST have an Invoice number (ibt-001).
Targeted Semantic Element
    
        
        
        - IBT-001-Invoice number
            :
            A unique identification of the Invoice.
            
        
 
        
    
Schematron Rules
    
        
        
        
        
            - 
                
- IBR-002
 
             
            
                - Flag
 
                - fatal
 
                - Context
 
                /ubl:Invoice | /cn:CreditNote 
                - Message
 
                - [ibr-002]-An Invoice MUST have an Invoice number (ibt-001).