| Logical domain attributes. | |
| Module | MEI.shared | 
| Members | custos (direct member of att.custos.log)
                | 
| Attributes | @target(optional)Encodes the target note when its pitch differs from the pitch at which the custos
                  appears.
               Value conforms to data.URI.
               att.custos.log | 
| Declaration | 
                  
                   | 
| Constraint | @target attribute should have content. The value in @target should correspond to the @xml:id attribute of a note element. 
                   |