GET (and POST) html form and query string variables
These can be read by Xtscript using the get and get_or_default commands.
Get variables can be assigned from a links query string or from a form
In html this code will be replaced by the value of the GET or POST variable with var_name or the default value
{_$var_name|default value}
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$func=get
$a_var=default_value