CANCELLED_STRING
term->strs[ind] = CANCELLED_STRING;
ud->str = CANCELLED_STRING;
#define VALID_STRING(s) ((s) != CANCELLED_STRING && (s) != ABSENT_STRING)
return (const char *)CANCELLED_STRING;
return (char *)CANCELLED_STRING;
(aflag && t->strs[i] == CANCELLED_STRING))
else if (ent->str == CANCELLED_STRING)
terms[j]->strs[i] == CANCELLED_STRING)
term->strs[i] = CANCELLED_STRING;
tud->str = CANCELLED_STRING;