SGML -> HTML -> world decides HTML is too limited -> XML
All are the progeny of SGML; HTML is "novel" because of how limited it was; by opening up the scope of XML to more or less all of SGML, it is much less "of the web" than HTML was.
I was working with and paying attention to markup schemes and languages from the mid-80s. At the time XML emerged, I remember a giant collective yawn from that side of the software world, precisely because it just seemed that W3C had decided to embrace-but-not-really-extend SGML.
SGML -> HTML -> world decides HTML is too limited -> XML
All are the progeny of SGML; HTML is "novel" because of how limited it was; by opening up the scope of XML to more or less all of SGML, it is much less "of the web" than HTML was.
I was working with and paying attention to markup schemes and languages from the mid-80s. At the time XML emerged, I remember a giant collective yawn from that side of the software world, precisely because it just seemed that W3C had decided to embrace-but-not-really-extend SGML.