Changes

== Using variables ==

\getvariable{namespace}{key}

</texcode>

== Defining new commands ==

Some commands have special characters in their names, that TeX normally does not consider to be

The newly defined command <tt>\!test</tt> can of course only be called upon when we are in the <cmd>unprotect</cmd>ed state, otherwise TeX reads the command <tt>\!</tt>, followed by the word <tt>test</tt> (and probably complains loudly about not being in math mode). These protection/unprotection commands can be nested. When the nesting becomes deeper than one level, the system reports the current protection level. It is a good habit to always start your macro files with <cmd>unprotect</cmd> and end them with <cmd>protect</cmd>.

[[Commands with KeyVal arguments|Commands with Key=Value arguments]],

[[Commands with optional arguments]]