The Matrix File Attribute List contains all information FMS needs to manage the files used for storing a matrix. You provide an empty array to the FMS subroutine that opens the matrix file and FMS fills in the necessary information. You then provide this array to each FMS subroutine you call to perform operations on the matrix.
For most applications, you do not need to know what FMS stores in this array. If you want to read or write the diagonal vector, the file is LUA(2). If you are reusing a matrix file as part of a nonlinear analysis, you may need to reset LUA(7) after each iteration. Other than these two conditions, you should not use terms directly from this array.
Word  Name  Description 

1  LUAL  FMS file number for lower triangle matrix [AL]. 
2  LUAD  FMS file number for matrix diagonals [D]. 
3  LUAU  FMS file number for upper triangle matrix [AU].
This file is only used for nonsymmetric matrices. For symmetric matrices, LUAU=0. 
4  LUAI  FMS file number for the Segment Table. 
5  LENRLU  Record length for files LUAL and LUAU. 
6  NUMSEG  Number of matrix segments. 
7  NEWSEG  Matrix segment status parameter.

8  NUMEQ  Number of equations. 
9  LENDIA  Record length of the diagonal file LUAD. 
10  NUMRLU  Number of records on files LUAL and LUAU. 
11  IDTYPE  Data type (1=real, 2=complex). 
12  ISTYPE  Matrix symmetry (1=symmetric, 2=nonsymmetric, 3=Hermitian). 
13  MFMAT  Matrix format (1=PROFILE, 2=BLOCK, 3=SLAB) 
14  MPIVOT  Reserved for future use. 
15  LENTAB  Length of the Segment Table, which is stored on file LUAI. 
16  IAVGBW  Average bandwidth 
17  IQSV  Queue/Stripe/Volume number 
18  IOPEN  Address space. =0, In FMS managed memory or disk, =1, In the application. This file was created by calling RSDANN, RNDANN, CHDANN, CSDANN, CNDANN. 
19  IROWCO  File format (0=Standard, 1=FMSROW, 2=FMSCOL, 3,4=FMSPUT) 
20  IFULL  Sparsity (0=Profile, 1=Full) 
21  NEQBIO  I/O block dimension NEQBIO (BLOCK and SLAB only) 
22  NEQBLK  Compute block dimension NEQBLK 
23  IJSTEP  Stride toward diagonal IJSTEP 
24  INSIDE  Blocking pattern INSIDE 
25  NONE  Reserved for future use 