Array and table files specified by a T in position 18 are loaded at program initialization time. The array or table file can be input or combined. Leave this entry blank for array or table output files. You cannot specify SPECIAL as the device for array and table input files. You cannot specify an externally described file as an array or table file.
If T is specified in position 18, you can specify a file type of combined (C in position 17) for a DISK or SEQ file. A file type of combined allows an array or table file to be read from or written to the same file (an array or table replacement file). In addition to a C in position 17, the filename in positions 7-16 must also be specified as the parameter to the TOFILE keyword on the definition specification.