- Equal : "=",
- NotEqual : "!=",
- GreaterThan : ">",
- GreaterThanEqual : ">=",
- LessThan : "<",
- LessThanEqual : "<=",
- Null : "null",
- NotNull : "not null",
- SameAs : "same as",
- DifferentThan : "different than",
- IsEmpty : "is empty",
- IsNotEmpty : "is not empty",
- StartsWith : "starts with",
- EndsWith : "ends with",
- Contains : "contains",
- NotContains : "does not contain",
- Between : "between",
- GreaterThanField : "greater than field",
- LessThanField : "less than field",
- NotStartsWith : "not starts with",
- NotEndsWith : "not ends with"