CTAN has a new package: syntrace

[CTAN Announcements]

The new package given below has been installed at tug.ctan.org and should
soon make its way to your favorite mirror.

Thank you,
Jim Hefferon
St Michael's College

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The following information was provided by the package's contributor.

Name of contribution: syntrace
Author's name: Mathieu Boretti
Location on CTAN: /macros/latex/contrib/syntrace
Summary description: Label for trace in syntaxic tree
License type: lppl

Announcement text given by the package's contributor: 
----------------------------------------------------------------------
This package add support for for trace in tree created using synttree 
package. It provide two commands (\traceLabel et \traceReference) to
set and use trace.
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See this package at 
  http://tug.ctan.org/tex-archive/macros/latex/contryb/syntrace
.  You may get a better network connection by using a CTAN mirror
near to you; see http://tug.ctan.org/tex-archive/README.mirrors .  
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Please join a users group; see http://www.tug.org/usergroups.html .