Some Perl subroutines:

## DU_ASSIGNVTAGS
## DU_CHECKTDT
## DU_DEQUOTE
## DU_DITEM2FIELDS
## DU_FINDITEM
## DU_FPRINTTDT
## DU_FREADTDT
## DU_HEXSTR
## DU_INDEX
## DU_PARSE_DB
## DU_PRINTERRORS (uses DayPerl)
## DU_RAWITEM2FIELDS
## DU_READTDT
## DU_TDT2ITEMS
## DU_TDT2LIST
## DU_TDT2PAGE
## STR2LINES