aggregate.tbl_validation
                        Count the number of invalid rules or records.
as.data.frame.tbl_validation
                        Retrieve validation results as a data.frame
compute.tbl_validation
                        Store the validation result in the db
confront.tbl_sql        Validate data in database 'tbl' with
                        'validator' rules.
confront_tbl            create a table with per record if it abides to
                        the rule.
confront_tbl_sparse     Create a sparse confrontation query
rule_works_on_tbl       tests for each rule if it can be executed on
                        the database
show_query.tbl_validation
                        Show generated sql code
tbl_validation-class    Validation object for 'tbl' object
values,tbl_validation-method
                        Retrieve the result of a
                        validation/confrontation
