Here is some more contrib-fodder, based on TIH's IP address type,
for ISBN and ISSN identifiers (which I just happened to need to keep
track of the things in my library).
I do not know about these contributions well as I only made the binaries
to contribute to a Japanese Linux package.(I did not test them.) But I
try to make some brief introduction about the contrib directory with my
poor English. Here is a draft of README about contrib directory:
