[Tex/LaTex] Specify arabic numerals in \ref{}

cross-referencingnumbering

I've two documents, doc1 references lists in doc2 through package xr.
In doc2 the lists are numbered with arabic numbers, but when referenced in doc1 using \ref{tag} they show up as roman numbers. How can I change this? I'd like to use arabic numbers always.

Minimal example:

\documentclass[a4paper,12pt,onecolumn,final]{ProjectStyle}
\renewcommand{\labelenumi}{\arabic{enumi}.}
\renewcommand{\labelenumii}{\labelenumi\arabic{enumii} }

\begin{document}
\renewcommand{\theenumi}{\arabic{enumi}.}
\renewcommand{\p@enumii}{\theenumi.\theenumii}

\setcounter{page}{1}
\pagenumbering{arabic}
\pagestyle{plain}


\begin{enumerate}
\item \textbf{Convites para conferencias, coloquio e SOC}
    \begin{enumerate}
    \item {\label{inv_leiden} Comprovante para \emph{Fine Tunning Stellar Population Models} (Leiden, 2006)}
    \item {\label{inv_iau} Comprovante para \emph{XII Latin American Regional IAU Meeting} (Isla Margarita, 2007)}
    \end{enumerate}
\end{enumerate}
Ref: \ref{inv_leiden}

\end{document}

And this is what I get:

enumii0..

  1. Convites para conferencias, coloquio e SOC

1.1 Comprovante para Fine Tunning Stellar Population Models (Lei- den, 2006)

1.2 Comprovante para XII Latin American Regional IAU Meeting (Isla Margarita, 2007)

Ref: 1a

Best Answer

The external reference to a document using xr should be the same as you get from a reference within the document (it just reads the value from the aux file.

\ref does not use \labelenumi at all that just affects the label used in the list display. For the first level list it uses \theenumi and for second level list it uses \p@enumii\theenumii.

You were missing a \makeatletter and and had the prefix including enumii twice, your MWE can not be run as it uses a local class but you see the same with book class.

\documentclass[a4paper,12pt,onecolumn,final]{book}
\makeatletter

\renewcommand{\labelenumi}{\arabic{enumi}.}
\renewcommand{\labelenumii}{\labelenumi\arabic{enumii} }

\renewcommand{\theenumi}{\arabic{enumi}}
\renewcommand{\theenumii}{\arabic{enumii}}
\renewcommand{\p@enumii}{\theenumi.}
\makeatother

\begin{document}

\setcounter{page}{1}
\pagenumbering{arabic}
\pagestyle{plain}


\begin{enumerate}
\item \textbf{Convites para conferencias, coloquio e SOC}
    \begin{enumerate}
    \item {\label{inv_leiden} Comprovante para \emph{Fine Tunning Stellar Population Models} (Leiden, 2006)}
    \item {\label{inv_iau} Comprovante para \emph{XII Latin American Regional IAU Meeting} (Isla Margarita, 2007)}
    \end{enumerate}
\end{enumerate}
Ref: \ref{inv_leiden}

\end{document}
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