Whenever somebody gives you a spec for some new technology, if you
can't understand the spec, don't worry too much. Nobody else is going
to understand it, either, and it's probably not going to be important.
This is the lesson of SGML, which hardly anyone used, until Tim
Berners-Lee dumbed it down dramatically and suddenly people understood
it. For the same reason he simplified the file transfer protocol,
creating HTTP to replace FTP.
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