General ⇒ xr package

[jamesm]

Hi
I'm having problems with the xr (cross-reference) package.
It happens with every call I make to "external" aux files.

Latex Code:

Code: Select all

Proposition \ref{prop:splitting lemma}.

Output:
Proposition 4.12Splitting Lemmatheorem.4.12.

Should just be:
Proposition 4.12.

The relevant line in the "external" aux file is:

Code: Select all

\newlabel{prop:splitting lemma}{{4.12}{41}{Splitting Lemma\relax }{theorem.4.12}{}}

Any suggestions?

Thanks, James

If it's relevant, I'm using Miktex 2.7 on Vista. And I have tried disabling all the other packages in the preamble in case there's a conflict, and there isn't.

[josephwright]

Please post a minimal example: an isolated snippet will not really help here!

[jamesm]

Aha - thanks for making me analyze it better. It seems to be a conflict with how the package hyperref effects labels.

We're talking about cross-referencing so I need two files. The main one is text.tex:

Code: Select all

\documentclass{article}
\usepackage{xr}

\externaldocument{external} %aux files are in same folder

\begin{document}

See Section \ref{newsec}.

That's it!

\end{document}

Then in the other file (called by xr) - say external.tex - I either include hyperref or not. Here are the two cases,

Code: Select all

\documentclass{article}
\usepackage{hyperref}
\begin{document}

\section{This new section} \label{newsec}
This is an external file.

\end{document} 

The file external.aux then contains the following line:
\newlabel{newsec}{{1}{1}{This new section\relax }{section.1}{}}
with the result that compiling text.tex gives the line,

See Section 1This new sectionsection.1.
That’s it!

Without hyperref, the following code

Code: Select all

\documentclass{article}
\begin{document}

\section{This new section} \label{newsec}
This is an external file.

\end{document} 

In this case, the file external.aux then contains the following line:
\newlabel{newsec}{{1}{1}}
And the reult of compilation is as it should be,

See Section 1.
That’s it!

Is there anyway to make hyperref and xr work together?[/quote]

Thanks again, James

[jamesm]

I can answer my own question, if anyone's interested.
If hyperref is used in the "external file", then it must also be used in the main file. If I add

Code: Select all

\usepackage{hyperref}

to the first piece of code in my previous post above, then it works fine (even though I'm not interested in having hyperlinks in the main file). It doesn't seem to matter whether \usepackage{hyperref} is placed before or after \usepackage{xr}.

Thanks again. James

[camiort]

Thank you for posting the solution!