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There has been quite a lot of interesting developments in the world of unambiguous representation of data - mostly all kinds of addresses of network services.
We have URIs
ssh://user@example.com:22/
We have multiformats
/dns4/example.com/tcp/22/
This one - proquint, (2009) stands out, as it proposes a high-density data encoding for long numbers such as credit card numbers, memory or IP addresses:
127.0.0.1 lusab-babad
63.84.220.193 gutih-tugad