This file is indexed.

/usr/share/doc/libhdf4/examples/SD/alter_sds_values.out_f is in libhdf4-doc 4.2r4-12build1.

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The actual contents of the file can be viewed below.

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File name: SDS.hdf 

Variable Name = SDStemplate
	 Index = 0
	 Type= 32-bit signed integer
	 Ref. = 2
	 Rank = 2
	 Number of attributes = 0
	 Dim0: Name=fakeDim0
		 Size = 16
		 Type = number-type not set
		 Number of attributes = 0
	 Dim1: Name=fakeDim1
		 Size = 5
		 Type = number-type not set
		 Number of attributes = 0
	 Data : 
                1 2 3 4 5 
                2 3 4 5 6 
                3 4 5 6 7 
                4 5 6 7 8 
                5 6 7 8 9 
                6 7 8 9 10 
                7 8 9 10 11 
                8 9 10 11 12 
                9 10 11 12 13 
                10 1000 12 13 14 
                11 1000 13 14 15 
                12 13 14 15 16 
                13 14 15 16 17 
                14 15 16 17 18 
                15 16 17 18 19 
                16 17 18 19 20