:Predefined variables
:Variable,Example,Signification
:reply
reply1 reply2 ...
variable containing the student answer to the question of type reply number 1

:choice
choice1 choice2 ...
variable containing the student answer to the question of type choice number 1

:step
step
variable giving the step number (in case where a command as \steps or \nextstep has been written).

:sc_reply
sc_reply1 sc_reply2 ...
variable between 0 et 1 according to bad or good answer (may have values between  0 and 1 for particular answer type).

:reply_
reply_1 reply_2 ...
variable containing the answer formated as in the analysis (can be used in step exercises or when no analyse is done).

:help_subject
help_subject
variable contenant l'identificateur de l'aide introduite par la méthode spéciale help.

:oef_firstname
oef_firstname
Participant firstname, by default $name_firstname.

:oef_lastname
oef_lastname
Participant lastname, by default $name_lastname.

:oef_login
oef_login
Participant login, by default anonymous.

:oef_now
oef_now
Time with format yyyymmdd:hh:mm:ss (20110515.22:19:25)

:oef_lang
oef_lang
Language of the participant or visitor (for example, en, fr, es)
