ABC for input validation paper (beta version)

Recently I wrote a paper to help programmers to handle input validation, I tried to make this paper as simple as posible (that's why ABC), but applicable to many technologies as well.  This is a beta version of this paper, Apendix is not so complete as well.

I've spent some time in this speacilly trying to keep it one or two pages long. I'll really apreciate your feedbak on this paper.

Thank in advance

 <<ABC_For_Input_Validation.pdf>>