Oh deary deary me... the mel scripting tutorial does not even talk of a single line of mel! Just so you know a expression and mel are separate things, i meanif your going to put tutorials on line atleast make sure you do it right.
It might not sound like a big deal but wait till someone has to sort out the difference for the poor soul you had steered the wrong way, for years. The difference is a bit hazy i know but if you learn it right day one it saves yu forma WHOLE LOT OF PAIN LATER IN LIFE. And it odes not give a all that pro feeling. By the way the best of the tutorials is the fluffy texture one but even it gould go a bit longer into whats up.
(not to mention the poor soul who gets super confused when i post something as a answer and then i to spend 12 hours explaining to him the difference of the things. And i mean ist hard to say thea least ebcaus eit takes him about 3-6 posts to even start considring that what he has learnt is pure wrong).
And just ot of curiosity why do they have to be pdfs?