我已经下载了 tikz-dependency 包并尝试了包文档中的基本示例。
\documentclass{article}
\usepackage{tikz}
\usepackage{tikz-dependency}
\begin{document}
\begin{dependency}
\begin{deptext}
My \& dog \& also \& likes \& eating \& sausage \\
\end{deptext}
\depedge{2}{1}{poss}
\depedge{4}{2}{nsubj}
\depedge{4}{3}{advmod}
\depedge{4}{5}{xcomp}
\depedge{5}{6}{dobj}
\end{dependency}
\end{document}
但是，我收到了以下错误：
！软件包 pgfkeys 错误：我不知道密钥“/depgraph/.search also”，我将忽略它。也许你拼错了。
怎么了？！
更新：
文件列表
article.cls 2007/10/19 v1.4h Standard LaTeX document class
size10.clo 2007/10/19 v1.4h Standard LaTeX file (size option)
tikz.sty 2008/02/13 v2.00 (rcs-revision 1.27)
pgf.sty 2008/01/15 v2.00 (rcs-revision 1.12)
pgfrcs.sty 2008/02/20 v2.00 (rcs-revision 1.21)
pgfrcs.code.tex
pgfcore.sty 2008/01/15 v2.00 (rcs-revision 1.6)
graphicx.sty 1999/02/16 v1.0f Enhanced LaTeX Graphics (DPC,SPQR)
keyval.sty 1999/03/16 v1.13 key=value parser (DPC)
graphics.sty 2009/02/05 v1.0o Standard LaTeX Graphics (DPC,SPQR)
trig.sty 1999/03/16 v1.09 sin cos tan (DPC)
graphics.cfg 2009/08/28 v1.8 graphics configuration of TeX Live
dvips.def 1999/02/16 v3.0i Driver-dependant file (DPC,SPQR)
pgfsys.sty 2008/02/07 v2.00 (rcs-revision 1.31)
pgfsys.code.tex
pgfsyssoftpath.code.tex 2008/01/23 (rcs-revision 1.6)
pgfsysprotocol.code.tex 2006/10/16 (rcs-revision 1.4)
xcolor.sty 2007/01/21 v2.11 LaTeX color extensions (UK)
color.cfg 2007/01/18 v1.5 color configuration of teTeX/TeXLive
pgfcore.code.tex
pgfcomp-version-0-65.sty 2007/07/03 v2.00 (rcs-revision 1.7)
pgfcomp-version-1-18.sty 2007/07/23 v2.00 (rcs-revision 1.1)
pgffor.sty 2007/11/07 v2.00 (rcs-revision 1.8)
pgffor.code.tex
tikz.code.tex
tikz-dependency.sty 2011/01/08 v1.1 Macros to draw dependency trees
environ.sty 2008/06/18 v0.2 A new way to define environments
解决方案： 软件包更新。感谢 Ulrike Fischer