| Constraint Name | constraintNumberSubAttribute (ERROR) |
| Class of the constraint | Author_XDSDocumentEntry |
| Package | rimihe |
| Description | If present, the author attribute shall have one or more values (IHE_ITI_TF_Rev8-0_Vol3_FT_2011-08-19.pdf Table 4.1-5) |
| OCL | self.slot->size()>0 |