# Problem numbering exsheets questions in appendix

I would like to include exercises in an appendix of a book and I have a problem to obtain correct numbers for these exercises:

\documentclass{book}
\usepackage{exsheets}
\SetupExSheets{
counter-within = chapter ,
counter-format = ch.se.qu
}
\begin{document}

\chapter{foo}
\section{foo one}
\begin{question}
foo one
\end{question}

\appendix
\chapter{bar}
\section{bar one}
\begin{question}
bar one
\end{question}

\end{document}


For section 1 in Appendix A, I would expect a number of A.1.1 for the first question in that section. However, I get 1.1.1 which is the correct number for the first chapter outside the appendix. Accordingly, numbers are as 2.1.1 for Appendix B etc.

What do I need to do to obtain the expected result?

You could use another \SetupExSheets command after \appendix with counter-format=ch[A].se.qu to enable uppercase numbers for the chapter counter.

\documentclass{book}
\usepackage{exsheets}
\SetupExSheets{
counter-within = chapter ,
counter-format = ch.se.qu
}
\begin{document}

\chapter{foo}
\section{foo one}
\begin{question}
foo one
\end{question}

\appendix

\SetupExSheets{
counter-format = ch[A].se.qu
}

\chapter{bar}
\section{bar one}
\begin{question}
bar one
\end{question}

\chapter{Another one}
\section{Foo}
\begin{question}
bar one
\end{question}

\end{document}


• With an up to date exsheets the following suffices for the whole document: counter-format = \thesection.qu. – cgnieder Apr 13 '16 at 21:03
• @clemens Thanks for the hint! It works great with the 0.20 exsheets version! I noticed that there is also a counter-format = \thechapter.qu option to get the ch.qu version right with appendices. – Thomas Apr 13 '16 at 22:33