Division 1.1.1 Data Quality

In order to improve data quality at an early stage, the functionality of the EES Central System (CS) shall include checking a set of data quality rules. Furthermore there will be data quality rules at the level of the national border infrastructure. The result of checking these rules against the data that has been entered can be seen as the quality status of data recorded.

The following order of priority shall be applied to compliance with quality rules:

1. (a)

   Blocking rules at the level of the national border infrastructure of each Member State. Upon data entry, quality rules generate an error to the user, forbidding sending the data to EES. Such a blocking rule may rely on complex checks such as dependencies between EES data sets.

2. (b)

   Blocking wrongly formatted messages at the level of the National Uniform Interface (NUI). Technically this is achieved through XSD definitions. Violating such a check would result in the system returning an error code forbidding saving the data in EES. The technical capabilities of such checks are limited in complexity to checking data types and patterns (such as checking the type of a value or its length).

3. (c)

   Soft rules. Upon data entry, soft quality rules generate a warning to the user if not complied with. They do not prevent saving the data and triggering subsequent processes, but in such cases also generate a warning. The soft rules shall be assessed by the Central System at the time of storing the data.

The collected information on the quality shall be conveyed to the responsible user as well as any other user accessing these data. This information shall be displayed to the end user to allow the necessary corrective measures to be taken. The related technical details will be defined in the technical specifications referred to in Article 37(1) of Regulation (EU) 2017/2226.