[Jgeneral] Documentation for "classes" directory

[Tom]

In poking around and going through labs and tutorials I have encountered 
a number of interesting routines in the system/classes directories that 
do not seem to have any internal or external documentation.  For example 
I note that the dirs verb uses jdirs and jview, both of which look 
interesting on their own.  I cannot seem to find any documentation for 
them however.  Can somebody point me toward any docs for these specific 
routines, and the routines in the system/classes directories in general?

Thanks in advance.
Tom
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