Validation rules
The data items set out in Annex I shall be subject to validation rules ensuring data quality and consistency. The validation rules shall meet the following criteria:
define the logical relationships between relevant data points;
include filters and preconditions that define a set of data to which a validation rule applies;
check the consistency of the reported data;
check the accuracy of the reported data;
set default values which shall be applied where the relevant information has not been reported.