\documentstyle{iso}
\standard{1234}
\title{An example standard}
\begin{document}
\foreword
The foreword goes here.
\tableofcontents
\maketitle
\introduction
\label{intro}
An introduction, with a label so that other
sections can refer to it, using \ref{intro}.
\section{The first section}
\clause{The first clause}
Text of the first clause.
\subclause{The only subclause}
\clause{Another clause}
Text of the second clause.
\section{Another section}
Text of this section.
\annex
\section{The first annex}
Text of the annex.
\end{document}
This example describes a standard, number 1234, called ``An example standard''. It has a foreword, table of contents and an introduction. These are followed by two sections and an annex. The first section has two clauses and one subclause.