Semantic typesΒΆ
As a part of the validation system, this package includes a plugin subsystem to define semantic types for data variables. These types help refine the meaning and validity rules of a particular variable for a more strict validation procedure. For example, an ISO variable can be defined as a three-letter string corresponding to the UN iso codes for existing regions.
Each type must be implemented as a class inheriting from SemanticType and implementing the following methods:
- check: Checks if a string passed as parameter is a valid value for the type. It also accepts optional parameters in case they were necessary for some implementations.
- help_info: Returns a string with the description of the type for help purposes.