The first "final" sgml standard document was published in 1986, the initial draft was available in 1980.
http://www.sgmlsource.com/history/sgmlhist.htm
The first html spec was thus accompanied with a DTD.
CERN was heavily involved in the sgml standardization, thus it was natural for Tim Berners-Lee at cern to go the sgml route with html.
The first "final" sgml standard document was published in 1986, the initial draft was available in 1980.
http://www.sgmlsource.com/history/sgmlhist.htm
The first html spec was thus accompanied with a DTD.
CERN was heavily involved in the sgml standardization, thus it was natural for Tim Berners-Lee at cern to go the sgml route with html.