spec_compliance_methods

## DBI classes and methods

A backend defines three classes, which are subclasses of DBIDriver, DBIConnection, and DBIResult. The backend provides implementation for all methods of these base classes that are defined but not implemented by DBI. All methods defined in DBI are reexported (so that the package can be used without having to attach DBI), and have an ellipsis ... in their formals for extensibility.