References

SGML
ISO 8879:1986, Information Processing Text and Office Systems Standard Generalized Markup Language (SGML).
sgmls
an SGML parser by James Clark <jjc@jclark.com> derived from the ARCSGML parser materials which were written by Charles F. Goldfarb. The source is available on the ifi.uio.no FTP server in the directory /pub/SGML/SGMLS .
W3
The World-Wide Web , a global information initiative. For bootstrap information, telnet info.cern.ch or find documents by ftp://info.cern.ch/pub/www/doc
URI
Universal Resource Identifiers. RFCxxx. Currently available by anonymous FTP from info.cern.ch in /pub/www/doc/url*.{ps,txt}