Future work: Add more types of rules

[SankBad]

Currently, we are detecting spelling errors, data type errors, and missing entry errors by generating rules. In the future, we wanted to add more types of errors. Some of the types of errors we can include are as follows.

1. Ordering rules: In configuration files, certain keyword (Let's say A) are always expected before certain another keyword (Let's say B). we wanted to find these explicit rules to detect ordering errors. In the above example, we entry of keyword A before keyword B.
2. Correlation rules: These rules detect integer correlations: one entry’s value should have a certain correlation with another entry’s value. For instance, in MySQL, the value of key_buffer should be larger than max_allowed_packet
3. Subnet rules: An entry is substring of another entry
4. Filepath rules: Concatenation of a file path entry with a partial file path entry forms a full file path. For example:
   [A<FilePath>]+[B<FileName>] => [<FilePath>]