Around 1995 SGML became an important topic for me as a tool for system configuration and generic computing. When I started working for larger banks I learned about the general qualities of a markup language, e.g. to support the re-use of information. That's when I started teaching first SGML (1996) and later in 1997 and 1998 XML. XML Event with Adam Rifkin and Rohit Khare 10+ pages .