Validate explicit attributes references whether all of the entity instances that are values of attributes of the specified application instance are of a valid entity data type for those attributes. Retrieves the non-persistent list of those attributes that does not conform to the validation.

• sdaiTRUE if all entity-valued attributes have instance values of a correct type;
• sdaiFALSE if any entity-valued attribute has an instance value of an incorrect type;
• sdaiUNKNOWN if any required explicit attribute value is unset that could reference an entity instance;