IBR-090
[ibr-090]-Only one project reference (ibt-011) is allowed on document level.
Targeted Semantic Element
    
        
        
        - IBT-011-Project reference
            :
            The identification of the project the invoice refers to
            
        
Schematron Rules
    
        
        
        
        
            - 
                - IBR-090
                - Flag
- fatal
- Context
- /ubl:Invoice | /cn:CreditNote
- Message
- [ibr-090]-Only one project reference (ibt-011) is allowed on document level.