texdef is an amazing command line tool that shows the definition of TeX commands. So when he wrote texdef -t latex a b c d e f g h i j k l m n o p q r s t u v x y z A B C D E F G H I J K L M N O P Q R S T U V X Y Z, it means to the program, "show me the definitions of all macros that have those names". :) 
As Martin writes: no there is no do processing after a file has been written. The finish_pdffile callback can be used to add information to the PDF file, the stop_run callback comes close, but not quite. It is used to replace the statistic information at the end of the run.
There are some software to analyse the cross references among codes (Java or C++). I used to use a software for code analysis under Windows many years before. But I can't remember the name. On linux, an example might be LXR Cross Referencer.
Is there a similar tool that can analyse the latex fi...
My typical approach is to write the paper in LaTeX, then (in a new file) to write the presentation in Beamer.
I am now getting to the point in my education/career where the first version of a paper and presentation won't be the last. The two will evolve together over some (hopefully not too long...
