Data structures are always described in upper case letters. A reference to a data structure described in the same document is always of the form
\data{DATASTRUCTURE}
and a reference to a routine defined in some external hypertext document
is always of the form
\extdata{DATASTRUCTURE}
.
A description of a data structure starts with a \section, \subsection, etc.
command:
\section{DATASTRUCTURE}
For correct operation of the \data and \extdata commands
the label must always start with data-:
\label{data-DATASTRUCTURE}
The data structure is then described in a straightforward manner using
LaTeX commands. For summing up different components of an array
we always use the description environment.
So for example,
\section{IINPUT}
\label{data-IINPUT}
\begin{description}
\item [Pos. 1] - something
\item [Pos. 2] - something else
\end{description}