Parameter list header format

The format of the parameter list header is shown in Table 1.

Table 1. Performance list header format
Dec (Hex) offset	Size (Bytes)	Description
0 (0)	2	Length of data segment (including length field)
2 (2)	2	Length of parameter list header only (including both length fields)
4 (4)	1	Reason for transmission Hex value X'00' Because of a Collect Performance Data CNM RU (correlate multiple segments using the PRID and ACB name field starting at offset 5) X'01' VTAM® event notification (multiple segments do not apply) X'02' SMF interval data (correlate multiple segments using the interval time stamp field starting at offset 16) X'03' SMF-related errors (multiple segments do not apply; no performance data vectors accompany this transmission)
5 (5)	10	Correlator Byte 5–6 PRID Same as PRID from Collect Performance Data CNM RU when the reason for transmission is X'00' Zero otherwise 7–14 ACB Name Name of the issuing monitor when the reason for transmission is X'00' Blanks otherwise
15 (F)	1	Flags General Use Bit setting B'.... .1..' SMF intervals missed since last SMF transmission (only valid when the reason for transmission is X'02') Chaining Indicators Bit setting B'.... ..10' First segment B'.... ..00' Middle segment B'.... ..01' Last segment B'.... ..11' Complete segment Bits not shown are reserved.
16 (10)	8	Interval time stamp SMF interval to which data should be correlated when the reason for transmission is X'02' Zero otherwise