How to remove the dot in the cross-reference to an item from enumerate?

[sierxue]

When I refer to an item in a enumerate list, there is an annoying dot in the sentence. Please see more details in my MWE.

I find some discussions about this but still couldn't solve it. See, for example, https://tex.stackexchange.com/q/288407/104838 and https://tex.stackexchange.com/q/234499/104838

MWE with Version 2020/08/04 v4.0.5 ElegantBook document class:

\documentclass[en]{elegantbook}
\begin{document}
\begin{problemset}\label{set:1}
    \item\label{itm:1_1}
        Problem 1
    \item Problem 2
\end{problemset}
Problem~\ref{itm:1_1} is quite easy!
\end{document}

[sikouhjw]

You need to redefine the problemset environment, which the source code section references to

ElegantBook/elegantbook.cls

Lines 715 to 721 in 78fe2c7

	\newenvironment{problemset}[1][\chaptername~\problemsetname]{
	\begin{center}
	\phantomsection\addcontentsline{toc}{section}{\texorpdfstring{\chaptername\;\problemsetname}{\problemsetname}}
	\textcolor{structurecolor}{\Large\bfseries\adftripleflourishleft~#1~\adftripleflourishright}
	\end{center}
	\begin{enumerate}}{
	\end{enumerate}}

You need to use the ability to set label and ref separately in the enumitem package

\documentclass[en]{elegantbook}
\renewenvironment{problemset}[1][\chaptername~\problemsetname]{
  \begin{center}
    \phantomsection\addcontentsline{toc}{section}{\texorpdfstring{\chaptername\;\problemsetname}{\problemsetname}}
    \textcolor{structurecolor}{\Large\bfseries\adftripleflourishleft~#1~\adftripleflourishright}
  \end{center}
  \begin{enumerate}[label=\color{structurecolor}\arabic*., ref=\arabic*]}{
  \end{enumerate}}
\begin{document}
\begin{problemset}\label{set:1}
    \item\label{itm:1_1}
        Problem 1
    \item Problem 2
\end{problemset}
Problem~\ref{itm:1_1} is quite easy!
\end{document}

[sierxue]

Thanks for your help!

It works in the pdf output! But I receive the following error message:

mwe-cross-reference-item.tex|12 error| Undefined control sequence. \problemsetname 
mwe-cross-reference-item.tex|12 error| Undefined control sequence. \chaptername \;\problemsetname 
mwe-cross-reference-item.tex|12 error| Undefined control sequence. ...left ~\chaptername ~\problemsetname

[sikouhjw]

I made a mistake. Your version is v4.x, and the code I gave is v3.11, and the code corresponding to v4.x is referred to

ElegantBook/elegantbook.cls

Lines 829 to 837 in f123c6a

	\newenvironment{problemset}[1][\chaptername~\chapterextra\exercisename]{
	\begin{center}
	\phantomsection\addcontentsline{toc}{section}{\texorpdfstring{\chaptername\;\exercisename}{\exercisename}}
	% \markboth{#1}{\rightmark}
	\markright{#1}
	\textcolor{structurecolor}{\Large\bfseries\adftripleflourishleft~#1~\adftripleflourishright}
	\end{center}
	\begin{enumerate}}{
	\end{enumerate}}

modified into

\documentclass[en]{elegantbook}
 \renewenvironment{problemset}[1][\chaptername~\chapterextra\exercisename]{ 
   \begin{center} 
     \phantomsection\addcontentsline{toc}{section}{\texorpdfstring{\chaptername\;\exercisename}{\exercisename}} 
     % \markboth{#1}{\rightmark} 
     \markright{#1} 
     \textcolor{structurecolor}{\Large\bfseries\adftripleflourishleft~#1~\adftripleflourishright} 
   \end{center} 
   \begin{enumerate}[label=\color{structurecolor}\arabic*., ref=\arabic*]}{ 
   \end{enumerate}}
\begin{document}
\begin{problemset}\label{set:1}
    \item\label{itm:1_1}
        Problem 1
    \item Problem 2
\end{problemset}
Problem~\ref{itm:1_1} is quite easy!
\end{document}

PS: It is not recommended to use the v4.x version because it is still in development

[sierxue]

This works like a charm! Your solution is greatly appreciated!