KOMA-Script scrreprt: Section numbering and heading embodied into the first line of text

Question

Using KOMA-Script package scrreprt I need to have the section numbering and heading included in the first paragraph of the section itself and the numbering of sections restarting from each chapter, i.e.: instead of

Chapter 1

Rome

1.1 The Magic Of Rome

Ibam forte via sacra.............

1.2 Modern Rome

Andavo per caso per la via sacra .......

Chapter 2

Milan

2.1 Is Milan magic?

Ibam forte via sacra.............

2.2 Modern Milan

Andavo per caso per la via sacra .......

===========:========== I would like to have:

Chapter 1

Rome

1.The magic of Rome. Ibam forte via sacra.............

2.Modern Rome. Andavo per caso per la via sacra .......

Chapter 2

Milan

1.Is Milan magic. Ibam forte via sacra.............

2.Modern Milan. Andavo per caso per la via sacra .......

How can I obtain this result?

Answer 1

Three things are important to obtain this result:

1. Remove the chapter numbering component from that of the section numbering:

   \renewcommand*\thesection{\arabic{section}}
   

2. Update the \section command to allow text to follow in-line with the title (a so-called run-in header). This depends on the fifth argument (or afterskip) to \@startsection. This value has to be negative. The default definition for \section is:

   \newcommand\section{\@startsection{section}{1}{\z@}%
     {-3.5ex \@plus -1ex \@minus -.2ex}%
     {2.3ex \@plus.2ex}%
     {\ifnum \scr@compatibility>\@nameuse{scr@v@2.96}\relax
       \setlength{\parfillskip}{\z@ plus 1fil}\fi
       \raggedsection\normalfont\sectfont\nobreak\size@section}%
   }
   

   where afterskip is given as 2.3ex \@plus.2ex (positive). We update this to now be

   \renewcommand\section{\@startsection{section}{1}{\z@}%
     {-3.5ex \@plus -1ex \@minus -.2ex}%
     {-2.3ex \@plus-.2ex}%{2.3ex \@plus.2ex}%
     {\ifnum \scr@compatibility>\@nameuse{scr@v@2.96}\relax
       \setlength{\parfillskip}{\z@ plus 1fil}\fi
       \raggedsection\normalfont\sectfont\nobreak\size@section}%
   }
   

   where afterskip is now -2.3ex \@plus-.2ex (negative).

   For a reference, see Where can I find help files or documentation for commands like \@startsection for LaTeX?

3. Force a period . after sectioning levels using

   \renewcommand*{\othersectionlevelsformat}[3]{#3.\enskip}
   

   The above also adds an \enskip, which you could remove if needed.

Here's a complete MWE containing the above modifications:

\documentclass[chapterprefix=true]{scrreprt}
\renewcommand*\thesection{\arabic{section}}
\makeatletter
\renewcommand\section{\@startsection{section}{1}{\z@}%
  {-3.5ex \@plus -1ex \@minus -.2ex}%
  {-2.3ex \@plus-.2ex}%{2.3ex \@plus.2ex}%
  {\ifnum \scr@compatibility>\@nameuse{scr@v@2.96}\relax
    \setlength{\parfillskip}{\z@ plus 1fil}\fi
    \raggedsection\normalfont\sectfont\nobreak\size@section}%
}
\makeatother
\renewcommand*{\othersectionlevelsformat}[3]{#3.\enskip}
\begin{document}
\chapter{Rome}
\section{Magic of Rome}
Ibam forte via sacra \ldots
\section{Modern Rome}
Andavo per caso per la via sacra \ldots
\chapter{Milan}
\section{Is Milan magic?}
Ibam forte via sacra \ldots
\section{Modern Milan}
Andavo per caso per la via sacra \ldots
\end{document}

Answer 2

You must redefine the counter \thesection

\documentclass[chapterprefix=true]{scrreprt}
\renewcommand*\thesection{\arabic{section}}
\begin{document}
\chapter{Rome}
\section{Magic of Rome}
Ibam forte via sacra \ldots
\section{Modern Rome}
Andavo per caso per la via sacra \ldots
\chapter{Milan}
\section{Is Milan magic?}
Ibam forte via sacra \ldots
\section{Modern Milan}
Andavo per caso per la via sacra \ldots
\end{document}

here the result: