RSCS Section

Table 1 describes the format of the RSCS section of the data set header.

Table 1. Fields in the RSCS Section of a Data Set Header
Field Name	Offset in Hex	Length	Type of Data	Default Value	Valid Range	Description
NDHVLEN	0	2	binary	none	4-32764	Length of the RSCS section of the data set header.
NDHVTYPE	2	1	binary	none	none	The major type of this section. The RSCS section of the data set header is identified by X‘87’.
NDHVMOD	3	1	binary	0	none	Modifier for the major type identifier. A modifier code of X‘00’ is the modifier for the RSCS section.
NDHVFLG1	4	1	byte			Reserved for IBM's use
NDHVCLAS	5	1	char	none	A-Z 0-9	The CP spool file class.
NDHVIDEV	6	1	binary	none	none	The originating CP device type. (See the CP DEVTYPES macro for valid values.)
NDHVPGLE	7	1	binary	none	none	The 3800 virtual page length.
NDHVDIST	8	8	char	blanks	none	The CP distribution code.
NDHVFNAM	10	12	char	blanks	none	The CP file name.
NDHVFTYP	1C	12	char	blanks	none	The CP file type.
NDHVPRIO	28	2	binary	50	0-99	The RSCS transmission priority as specified on the TAG command.
NDHVVRSN	2A	1	binary	none	none	The version number of the RSCS system that created the header.
NDHVRELN	2B	1	binary	none	none	The release number of the RSCS system that created the header.
NDHVTAGR	2C	136	char	none	none	The TAG record as specified on the TAG command.
NDHVDSNO	B4	2	bin	0	none	The List processor data set number.