How to cross-reference a third-level sectioning header while including the higher-level sectioning numbers

Question

My document structure looks like this:

I. Example-heading
  1. Example-subheading
  2. Example-subheading 2
    a) Example-subsubheading
    b) Example-subsubheading 2
       (aa) Example-subsubsubheading
       (bb) Example-subsubheading 2
          ...
             ...
               ...
II. Example-heading 2
  1. Example2-subheading

When I now use

\subthreesection{Example-subsubsubheading}\label{my-label}

and later on somewhere in the text

\ref{my-label} \nameref{my-label}

The output is like

(aa) Example-subsubsubheading

But I would like to have

I.2.a).(aa) Example-subsubsubheading

And not only for third-level but for seven-level or deeper.

I'm using the document class hausarbeit-jura (a document class for jura student papers).

How can I achieve this?

Answer 1

Since you use the hausarbeit-jura document class, I suggest you modify the "prefix macros" \p@subsection, \p@subsubsection, and \p@subthreesection. Specifically, you should insert the following instructions in the preamble:

\makeatletter
\renewcommand\p@subsection{\thesection}
\renewcommand\p@subsubsection{\p@subsection\thesubsection}
\renewcommand\p@subthreesection{\p@subsubsection\thesubsubsection.}
\renewcommand\p@subfoursection{\p@subthreesection\thesubthreesection.}
\renewcommand\p@subfivesection{\p@subfoursection\thesubfoursection.}
\renewcommand\p@subsixsection{\p@subfivesection\thesubfivesection.}
\makeatother

Remark: I've added three additional levels of cross-referencing prefix macros beyond those you requested in your initial posting. I trust you have enough information to carry on to levels seven and eight as well as to paragraph and subparagraphs...

A full MWE:

\documentclass{hausarbeit-jura}
\usepackage[colorlinks]{hyperref} % for \nameref macro

\makeatletter  % use a recursive approach to define the prefix macros:
\renewcommand\p@subsection{\thesection}
\renewcommand\p@subsubsection{\p@subsection\thesubsection}
\renewcommand\p@subthreesection{\p@subsubsection\thesubsubsection.}
\renewcommand\p@subfoursection{\p@subthreesection\thesubthreesection.}
\renewcommand\p@subfivesection{\p@subfoursection\thesubfoursection.}
\makeatother

\begin{document}
level-1 sub: \ref{my-label1} \nameref{my-label1}

level-2 sub: \ref{my-label2} \nameref{my-label2}

level-3 sub: \ref{my-label3} \nameref{my-label3}

level-4 sub: \ref{my-label4} \nameref{my-label4}

level-5 sub: \ref{my-label5} \nameref{my-label5}

etc.

\section{Section heading}
\subsection{Subsection heading} \label{my-label1}
\subsubsection{Subsubsection heading} \label{my-label2}
\subthreesection{Subthree-heading} \label{my-label3}
\subfoursection{Subfour-heading} \label{my-label4}
\subfivesection{Subfive-heading} \label{my-label5}
\end{document}

Answer 2

Apart from the numbering style (which must be setup differently and that's a different question) the 'contraction' of the reference style can be achieved easily with zref when links are required, just replace \label with zlabel and setup a \fullref command that extracts the anchor, default value and title of the link.

\documentclass{book}
\usepackage{hyperref}

\usepackage[user,hyperref,titleref]{zref}


\makeatletter
\newcommand{\fullref}[1]{%
  % Check for existence and provide a hyperlink
  \zref@ifrefundefined{#1}{%
  }{%
    \hyperlink{\zref@extract{#1}{anchor}}{\zref@extract{#1}{default} \zref@extract{#1}{title}}%
  }%    
}
\makeatother


\begin{document}

See \fullref{my-label}

\chapter{Example-heading}
\section{Example-subheading}
\section{Example-subheading 2}
\subsection{Example subsubheading} 

\subsubsection{Example subsubheading} 
\subsubsection{Example subsubheading 2}  \zlabel{my-label}

\chapter{Example-heading 2}
\section{Example-subheading again}

\end{document}

Update for the hausarbeit-jura.cls

\documentclass{hausarbeit-jura}

\usepackage{expl3}
\usepackage{hyperref}
\usepackage[counter,user,hyperref,titleref]{zref}


\makeatletter
\zref@newprop{chapterprop}{\thechapter}
\zref@newprop{sectionprop}{\thesection}
\zref@newprop{subsectionprop}{\thesubsection}
\zref@newprop{subsubsectionprop}{\thesubsubsection}
\zref@addprops{main}{chapterprop,sectionprop,subsectionprop,subsubsectionprop}

\ExplSyntaxOn

\cs_new:Npn \extractstructure #1{
  \str_case_x:nn {\zref@extract{#1}{counter} }
  {
    {chapter} {\zref@extract{#1}{chapterprop} }
    {section} {\zref@extract{#1}{chapterprop}~\zref@extract{#1}{sectionprop} }
    {subsection} {\zref@extract{#1}{chapterprop}~\zref@extract{#1}{sectionprop}~\zref@extract{#1}{subsectionprop} }
    {subsubsection} {\zref@extract{#1}{chapterprop}~\zref@extract{#1}{sectionprop}~\zref@extract{#1}{subsectionprop}~\zref@extract{#1}{subsubsectionprop} }
  } 
}
\ExplSyntaxOff

\newcommand{\fullref}[1]{%
  % Check for existence and provide a hyperlink
  \zref@ifrefundefined{#1}{%
  }{%
    \hyperlink{\zref@extract{#1}{anchor}}{\extractstructure{#1} \zref@extract{#1}{title}}
  }%    
}
\makeatother


\begin{document}

See \fullref{my-label} or \fullref{somechapter}

\chapter{Example-heading}
\section{Example-subheading}
\section{Example-subheading 2}
\subsection{Example subsubheading} 

\subsubsection{Example subsubheading} 
\subsubsection{Example subsubheading 2}  \zlabel{my-label}

\chapter{Example-heading 2} \zlabel{somechapter}
\section{Example-subheading again}

\end{document}

Answer 3

I had the same question with a standard document class: Abbreviated references: just the necessary references, no more

In a nutshell: If I'm on the "II." branch, the reference from e.g. II.3.b) doesn't need to be to II.1.a), but simply 1.a). But if I'm refering from somewhere under III., the reference in the text has to bee II.1.a), of course.

It took me a whole day and much help to find this solution:

https://tex.stackexchange.com/a/325871/4736