// Filter type and option definitions
syntax = "proto3";

package siemens.common.operators.v1;

enum ComparisonOperator {
    EQUAL = 0;                      // == (exact match for strings, case sensitive)
    NOT_EQUAL = 1;                  // !=
    GREATER_THAN = 2;               // >
    GREATER_THAN_OR_EQUAL_TO = 3;   // >=
    LESS_THAN = 4;                  // <
    LESS_THAN_OR_EQUAL_TO = 5;      // <=

    // for string datatype only
    STRING_PATTERN = 6;             // '?' is a wildcard for one character, "*" is a wildcard for many characters
}