The package below has been updated on tug.ctan.org and should soon be at your favorite mirror.
Thank you, Jim Hefferon Saint Michael's College
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The following information was provided by our fellow contributor:
Name of contribution: prerex Author's name: Bob Tennent Location on CTAN: /graphics/prerex Summary description: Interactive editor for prerequisite charts, macro support. License type: gpl
Announcement text: ---------------------------------------------------------------------- This implementation of prerex.sty is based on pgf rather than pstricks, allowing use of either latex->dvips or pdflatex. Some minor bugs in the editor have been fixed. ----------------------------------------------------------------------
This package is located at http://tug.ctan.org/tex-archive/graphics/prerex . More information is at http://tug.ctan.org/cgi-bin/ctanPackageInformation.py?id=prerex (if the package is new it may take a day for that information to appear). We are supported by the TeX Users Group http://www.tug.org . Please join a users group; see http://www.tug.org/usergroups.html .