/sys$common/syshlp/helplib.hlb SET, FILE, Qualifiers, /ATTRIBUTE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /ATTRIBUTE=(file-attribute[,...])

    Sets the attributes associated with a file. The following table
    lists possible keywords and the relationship to both ACP-QIO and
    OpenVMS RMS File attributes:

                                                OpenVMS RMS File
    Keyword     ACP-QIO File Attribute          Attribute

    BKS:{value} FAT$B_BKTSIZE={byte}            FAB$B_BKS={byte}
    DEQ:{value} FAT$W_DEFEXT={word}             FAB$W_DEQ={word}
    EBK:{value} FAT$L_EFBLK={longword}          XAB$L_EBK={longword}
    FFB:{value} FAT$W_FFBYTE={word}             XAB$W_FFB={word}
    FSZ:{value} FAT$B_VFCSIZE={byte}            FAB$B_FSZ={byte}
    GBC:{value} FAT$W_GBC={word}                FAB$W_GBC={word}
    HBK:{value} FAT$L_HIBLK={longword}          XAB$L_HBK={longword}
    LRL:{value} FAT$W_RSIZE={word}              XAB$W_LRL={word}
    MRS:{value} FAT$W_MAXREC={word}             FAB$W_MRS={word}
    ORG:IDX     FAT$V_FILEORG=FAT$C_INDEXED     FAB$B_ORG=FAB$C_IDX
    ORG:REL     FAT$V_FILEORG=FAT$C_RELATIVE    FAB$B_ORG=FAB$C_REL
    ORG:SEQ     FAT$V_FILEORG=FAT$C_SEQUENTIAL  FAB$B_ORG=FAB$C_SEQ
    RAT:BLK     FAT$B_RATTRIB=FAT$M_NOSPAN      FAB$B_RAT=FAB$M_BLK
    RAT:CR      FAT$B_RATTRIB=FAT$M_IMPLIEDCC   FAB$B_RAT=FAB$M_CR
    RAT:FTN     FAT$B_RATTRIB=FAT$M_FORTRANCC   FAB$B_RAT=FAB$M_FTN
    RAT:MSB     FAT$B_RATTRIB=FAT$M_MSBVAR      FAB$B_RAT=FAB$M_MSB
    RAT:NONE    FAT$B_RATTRIB=0                 FAB$B_RAT=0
    RAT:PRN     FAT$B_RATTRIB=FAT$M_PRINTCC     FAB$B_RAT=FAB$M_PRN
    RFM:FIX     FAT$V_RTYPE=FAT$C_FIXED         FAB$B_RFM=FAB$C_FIX
    RFM:STM     FAT$V_RTYPE=FAT$C_STREAM        FAB$B_RFM=FAB$C_STM
    RFM:STMCR   FAT$V_RTYPE=FAT$C_STREAMCR      FAB$B_RFM=FAB$C_STMCR
    RFM:STMLF   FAT$V_RTYPE=FAT$C_STREAMLF      FAB$B_RFM=FAB$C_STMLF
    RFM:UDF     FAT$V_RTYPE=FAT$C_UNDEFINED     FAB$B_RFM=FAB$C_UDF
    RFM:VAR     FAT$V_RTYPE=FAT$C_VARIABLE      FAB$B_RFM=FAB$C_VAR
    RFM:VFC     FAT$V_RTYPE=FAT$C_VFC           FAB$B_RFM=FAB$C_VFC
    VRS:{value} FAT$W_VERSIONS={word}           XAB$W_VERLIMIT={word}