public enum Num
{
       equal,
       notEqual,
       lessThan,
       greaterThan,
       lessThanEqual,
       greaterThanEqual
}

public enum Date
{
       equal,
       notEqual,
       lessThan,
       greaterThan,
       lessThanEqual,
       greaterThanEqual
}

public enum Char
{
       equal,
       notEqual,
       beginWith,
       endWith,
       contains
}

public enum AndOr
{
       And,
       Or
}