READ [/RELOCATE=expression]  filespec

    Copies global symbols from an object module to the SDA symbol table.
    The READ command lets you extract global symbols from any object
    module and insert the definitions into the SDA symbol table.  If you
    do not specify a file type, STB is used by default.

    The following MACRO program can be used to obtain symbols in addition
    to those in SYS.STB:

        .TITLE  GLOBALS
        $PHDDEF GLOBAL          ; Process header definitions
        $DDBDEF GLOBAL          ; Device data block
        $UCBDEF GLOBAL          ; Unit control block
        $VCBDEF GLOBAL          ; Volume control block
        $ACBDEF GLOBAL          ; AST control block
        $IRPDEF GLOBAL          ; I/O request packet
        ; more can be inserted here
        .END

    Use the command below to generate an object module file containing
    the globals defined in the program.

        $ MACRO GLOBALS+SYS$LIBRARY:LIB/LIBRARY /OBJECT=GLOBALS.STB

Additional information available:

/RELOCATE

    Change the relative addresses of the symbols to absolute addresses,
    by adding expression, the base value, to each relative address
    in the object module.  This qualifier changes those addresses
    to absolute addresses in the address space into which the dump is
    mapped.