This read-create INTEGER specifies the numeric byte offset, relative to the reference point set in rlQosOffsetType, where the custom pattern match should be applied. An admin fine-tunes this to point exactly at the byte position within a packet that carries the value they want to match, such as a specific field in a non-standard protocol header. For example, if a proprietary control byte sits 14 bytes past the chosen offset type's reference point, the admin sets this value to 14 so the classification rule inspects precisely that byte.