Supports arbitrary pattern match classification. Up to 128 bytes of data within the first 128 bytes of a packet can be identified for pattern matching purposes. This object and the ntnSystemClfrPatternPosition object specify byte patterns and their position in a packet. When a packet is classified using this data, the appropriate bytes, or portions thereof, in the packet are compared against the byte patterns defined by the this attribute. If the data at the specified packet offset is the same, the packet is considered a match. The byte patterns used for comparison purposes are specified using this attribute. The target data is placed in the octet string at the positions specified through the ntnSystemClfrPatternPosition attribute. All other bytes should be set to zero For example, to specify that byte positions 5-8 and the high-order nibble (4 bits) of bytes 13-16 should be examined, the associated ntnSystemClfrPatternPosition value would be set as follows: ntnSystemClfrPatternPosition (size 16): 00:00:00:00:FF:FF:FF:FF:00:00:00:00:0F:0F:0F:0F The target byte patterns would then be placed in bytes 5-8 and in portions of bytes 13-16 of this attribute: ntnSystemClfrPatternData (size 16): 00:00:00:00:XX:XX:XX:XX:00:00:00:00:0Y:0Y:0Y:0Y Note that an implementation may not support pattern matching, also know as offset filtering, for the maximum number of bytes supported by the pattern match attributes. The number of bytes that can contain data for comparison purposes and the position of those bytes in relation to the start of a packet are thus implementation dependent. Use of this object and the associated ntnSystemClfrPatternPosition object invalidates the use of any other classification data in this and related (through the ntnClfrComponentTable) classifier entries. In other words, providing an explicit pattern overrides the implicit patterns defined when classification data is specified for other fields, such as the IP source address or EtherType classification attributes. A zero length string is used to indicate that explicit pattern matching is not requested. Version 1/2 attribute.