It would be very nice that Atlas model could contain a way to represent attribute validation.
A simple example is that we would like to model a Person, with attributes Name, Email and Country. Now we would like to specify that Email has to follow a specific regular expression, so it would be nice if we could set Email -> hasValidation -> EmailRegex, with EmailRegex having:
Name: Email Regular Expresion
For more complex types of validation, e.g. checking card number validity, it could be added some external validator function/service.
Name: Credit Card Number Validator
Validator: org.apache.atlas.validators.creditcard or https://host:port/creditCardValidator
For validations from a reference table, for example a country name, it could be:
Name: Country Name Ref Validator
Reference Column: <country_name_column>
where <country_name_column> would be an instance of type Hive_Column or HBase_Column.
Since this is a kind of Standarization, it could be placed in Area 5.
A similar approach is followed in software Kylo