# Referring to specific list item with hyperref

using the following code, when I click on references (having red boxes), they do not refer to proper places.

\documentclass{article}
\usepackage{array,longtable}
\usepackage{hyperref}

\begin{document}

\renewcommand\theenumii{\alph{enumii}}
\makeatletter
\def\subitem{\omit\@arstrut
\ifnum\value{enumii}=0 \stepcounter{enumi}\fi
\refstepcounter{enumii}\theenumi\theenumii\hfill}
\def\item{\omit\setcounter{enumii}{0}\let\omit\relax}
\makeatother

\begin{longtable}{>{\refstepcounter{enumi}\setcounter{enumii}{0}\theenumi}lr}
\item
\subitem \label{1a}& fooo \\
\subitem \label{1b}& foo \\
\item
\subitem \label{2a}& foo \\
\subitem \label{2b}& foo \\
\label{3}& foo  \\
\label{4}& foooo \\
\end{longtable}

we have \ref{1a}, \ref{2b}, \ref{4}

\end{document}

-
I added a missing \end{document} in your MWE. Please have a look if anything else is missing ... –  Kurt Nov 30 '12 at 2:01
Be careful in using \subitem as a command name, since it's used in the theindex environment. All's well until you need to make an index, when disaster might be approaching. –  egreg Nov 30 '12 at 7:57
@egreg yes well he got that code from me in the previous question.:-) Once it's working the thing to do really is put the \item and \subitem definitions into the start code of a custom environment just before starting longtable, to keep the scope of the redefinition local. –  David Carlisle Nov 30 '12 at 9:23

## 1 Answer

Two problems:

• The anchor names are not unique. This can be fixed by redefining \theHenumi and \theHenumii.
• The anchor position is the baseline. The anchor is set by \refstepcounter. This can be cured by \raisebox{\ht\@arstrutbox}[0pt]{...}. But then \refstepcounter is called inside a group and the meaning of \@currentlabel (what \ref sees) and \@currentHref (anchor name, if option localanchorname is used). Therefore these values are put into global scratch variables to restore them after \raisebox.

The example file with update for adding parentheses and the dot. And another update for bold numbers in the table.

\documentclass{article}
\usepackage{array,longtable}
\usepackage[verbose]{hyperref}

\begin{document}

\renewcommand\theenumii{(\alph{enumii})}
\renewcommand*{\theHenumi}{\theenumi}
\renewcommand*{\theHenumii}{\theenumi\alph{enumii}}
\makeatletter
\newcommand*{\raiserefstepcounter}[1]{%
\raisebox{\ht\@arstrutbox}[0pt]{%
\hypersetup{localanchorname}%
\refstepcounter{#1}%
\global\let\g@currentlabel\@currentlabel
\global\let\g@currentHref\@currentHref
}%
\let\@currentlabel\g@currentlabel
\let\@currentHref\g@currentHref
}
\def\subitem{%
\omit\@arstrut
\ifnum\value{enumii}=0 %
\stepcounter{enumi}%
\fi
\raiserefstepcounter{enumii}%
\bfseries
\theenumi\theenumii.\hfill
}
\def\item{%
\omit
\setcounter{enumii}{0}%
\let\omit\relax
}
\makeatother

\makeatletter
\begin{longtable}{%
>{%
\raiserefstepcounter{enumi}%
\setcounter{enumii}{0}%
\bfseries\theenumi
}l<{\unskip.}r%
}
\item
\subitem \label{1a}& fooo \\
\subitem \label{1b}& foo \\
\item
\subitem \label{2a}& foo \\
\subitem \label{2b}& foo \\
\label{3}& foo  \\
\label{4}& foooo \\
\end{longtable}

we have \ref{1a}, \ref{2b}, \ref{4}

\end{document}


-
thanks for sorting that out, I asked the OP to ask another question rather than adding a hyperref constraint on the previous one. –  David Carlisle Nov 30 '12 at 9:26
thanks. in the table, we have 1a, 1b, for example. how can i set them to 1(a)., 1(b).. also, in the body of text, when we want to refer to these items, we would have we have 1(a) and 1(b). it would be preferable not to use \renewcommand{\theenumii}{...} –  smh Nov 30 '12 at 11:01
@shm It is unclear to me, what you want to have in the table, with/without parentheses, with/without dot? –  Heiko Oberdiek Nov 30 '12 at 11:17
@Oberdiek i want 1(a)., 1(b)., 2., ... in the table (list items). and when referring to these items out in the body of text, i want we have 1(a) or 1(b) or 2, for example. –  smh Nov 30 '12 at 12:15
@Oberdiek thanks a lot. as an extension, could we have numbers in 1'st column of table in bold, and blue colored form? –  smh Nov 30 '12 at 22:26