The typed_strings area consists of several entries, each of which is a number and a string. The number is 4 bytes and the string is NULL-terminated as per C. The number in the entry corresponds to a particular constant from the system include file <confname.h> (see the C function confname() for more information).

Generally, you wouldn't access this member yourself; the various init_*() library functions put things into the typed strings literal pool themselves. But if you need to add something, you can use the function call add_typed_string() from the library.