Discretionary hyphens for words in dot-notation

Question

we're working on a technical document with some special requirement identifier, which use a dot-notation. For example:

FRQ.SW.MOD.GUI.1
FRQ.DATA.LOG.OUT.PRINT.1

As you might expect we get a lot of overfull box messages and theses "words" get not split by the hyphenation mechanism.

So I'm looking for another solution. Is there a way defining a discretionary-rule or something else to get these words wrapped? We don't want to use something like \url. The user experience should be smooth as possible.

Thx, aronadaal

This question is a follow up to Replacing # for use inside \label

Answer 1

use the url package and

\path|FRQ.DATA.LOG.OUT.PRINT.1|

and it will allow breaking at .

You could define a command with a different name if needed, see the url package documentation.

Adding this to your example from the linked question, and setting up @ as a safer way to input # gives

\documentclass[a4paper]{scrartcl}
\usepackage[left=2cm,right=2cm,top=2.5cm,bottom=2cm]{geometry}
\setlength\parindent{0pt}

\usepackage{url}


\makeatletter
\newcommand{\req}[2]{%
  \begingroup
    \textbf{\url{#1}}%
    \addcontentsline{lor}{requirement}{\protect\url{#1}}%
    \def\@currentlabel{\protect\url{#1}}\label{req:#1}~#2\par
   \endgroup  
}

\DeclareNewTOC[%
  type=requirement, %
  types=requirements, %
  name=Anforderung, %
  listname={List of Requirements} %
]{lor}
\setuptoc{lor}{chapteratlist}

\def\UrlBigBreaks{\do\.}
\mathchardef\UrlBigBreakPenalty=50
\let\oldUrlSpecials\UrlSpecials
\def\UrlSpecials{\oldUrlSpecials\do\@{\texttt\#}}
\begin{document}
\section{Test}
\req{MY.REQ.ID.42}{Lorem ipsum dolor sit amet,...}

\req{MY.REQ.ID.43@BROKEN}{this requirement is broken,...}

xxx xxx xxx xxx xxx xxx xxx xxx xxx xxx xxx 
xxx xxx xxx xxx xxx 
Please have a look at \ref{req:MY.REQ.ID.42} on page~\pageref{req:MY.REQ.ID.42}

x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x
Please have a look at \ref{req:MY.REQ.ID.43@BROKEN} on page~\pageref{req:MY.REQ.ID.42}


\listofrequirements

\end{document}