Dia extensions

[Daniel Pérez Alcázar <danielpa wanadoo es>]

Hello,

It's my first time I write to this list.

I'm writing because I wanted to write a program, but  I concluded that 
Dia would do the job better. I want to  know if my problem can be solved 
by Dia.

My idea was to write a program to help CS students from Barcelona's CS 
Faculty (FIB) to choose among the different optional  subjects. You may 
say ''Dear Dani, it is not a so difficult task!", but it is! The thing 
is that, as many other faculties, FIB has a lot of optional subjects 
(and they are more than  1/3 of your curriculum) and they have 
requisites among them. The goal of the program would be to draw a 
diagram of the subjects you would have choosen, but furthermore, it 
would help with requisites and automatically would draw any requisite of 
any subject you would choose.

I think that there isn't any problem to create a new library, like UML, 
Sybase or any Dia library, where each member would be a subject, with 
information related to it, hours per week, teachers, etc... But my 
question is the following: imagine I have created  my subject library: I 
have the subject CL1 (compilers I) and CL2 (compilers II) for example. I 
click on CL2 and I drag it in my Dia sheet. Because CL1 is a requisite 
of CL2, it would be desirable to Dia draw it for me (and furthermore, 
draw a "link" between both subjects). And also check if, in the current 
sheet, I haven't spent all week hours for optional subjects.

I have not read any Dia source code line yet, at the momment I'm only 
looking for advice.

Thanks in advance. Excuse me if my written English is bad (my spoken 
English is worse :-) )

Dani P.