pre­rex – In­ter­ac­tive ed­i­tor and macro sup­port for pre­req­ui­site charts

This pack­age con­sists of pre­rex.sty, a LaTeX pack­age for pro­duc­ing charts of course nodes linked by ar­rows rep­re­sent­ing pre- and co-req­ui­sites, and pre­rex, an in­ter­ac­tive pro­gram for cre­at­ing and edit­ing chart de­scrip­tions. The im­ple­men­ta­tion of pre­rex.sty is built on PGF, so that it may be used equally hap­pily with la­tex or pdfla­tex; pre­rex it­self is writ­ten in C.
The pack­age in­cludes source code for a pre­viewer ap­pli­ca­tion, a lightweight Qt-4 and pop­pler-based pre­rex-en­abled PDF viewer.