The generated document looks like:
They set the text between \begin{ENVIR} and \end{ENVIR} in a special way, according to the given environment.
with:
OPTIONS | describe some general parameters like paper format or basic font size (a4paper, 11pt) |
TYPE | type of document (article, report, book) |
PREAMBEL | commands with special style infos or macros |
TEXT | the text with additional commands |