Longtable spacing

Question

I am using longtable and I cannot find a way to adjust its column spacing. I want a table like this:

But I am getting this:

This is what I am doing for defining table size:

 \begin{longtable}{p{.1\textwidth} p{.2\textwidth} p{.2\textwidth}p{.3\textwidth}}
    xxxxx & xxxxx & xxx & xxxxx\\
    \end{longtable}

Answer 1

Package ltxtable allows the combination of longtable with tabularx column type X. The latter is useful for the last column with the description text. The first columns can be set via column type l. The indentation in the description part can be achieved via \hangindent and \hangafter (assuming there is only one paragraph).

Since the package ltxtable requires a separate file for the table, package filecontents is used, which allows the environment filecontents inside the document body. Also the file is overwritten each time and is therefore uptodate.

The larger line spacing between rows is achieved by redefining \arraystretch.

\documentclass{article}
\usepackage{array}
\usepackage{booktabs}
\usepackage{ltxtable}
\usepackage{filecontents}

\begin{document}
\setcounter{table}{6}

\begin{filecontents}{\jobname-table-parameters}
\renewcommand*{\arraystretch}{1.2}
\begin{longtable}{lll>{\hangindent=1em\hangafter=1 }X}
\caption{Some parameters}\\
\toprule
\# & Name & Type & Description \\
\midrule
\endfirsthead
\caption[]{(continued)}\\
\toprule
\# & Name & Type & Description \\
\midrule
\endhead
\bottomrule
\endfoot
f1 & duration & Integer
  & Duration of the connection\\
f2 & protocol\_type & Nominal
  & Protocol type of the connection: TCP, UDP, ICMP\\
f3 & service & Nominal
  & http, ftp, smtp, telnet, \dots\ and others\\
f4 & flag & Nominal
  & Connection status: SF, S0, S1, S2, S3, OTH, REJ, RSTO, RSTOS0, SH,
  RSTRH, SHR\\
f5 & src\_bytes & Integer
  & Bytes sent in one connection\\
f6 & dst\_bytes & Integer
  & Bytes received in one connection\\
f7 & land & Binary
  & If source and destination IP addresses and port numbers
  are equal, this variable is~1, else~0\\
\end{longtable}
\end{filecontents}

\LTXtable{\linewidth}{\jobname-table-parameters}

\end{document}