This read-create INTEGER, ranging 0 to 255, is the specific bit pattern that the masked bits extracted at the configured offset must equal for this classification rule to match. An admin pairs this with the offset and mask fields to build a precise custom match condition, such as identifying packets carrying a particular vendor-specific tag value. For example, if the admin wants to match packets where a masked flag byte equals binary 10, they set this pattern field to that specific value so only packets with exactly that bit combination match.