Initialises a context key with a value or with the value of another variable.

  SET VARIABLE <varname> FROM <litteral>

  SET VARIABLE <varname> FROM :<varname>

  SET VARIABLE <varname> FROM Litterals with :{<varname>} inside

  SET VARIABLE defautname FROM Default

  SET VARIABLE savedcourseid FROM :courseid

  SET VARIABLE extendeddefaultname FROM :{courseid}_with_extensions

• varname: The name of the variable to create, without spaces or special characters.
• litteral: A literal string

The created variable is installed in the global context of the execution stack for the lifetime of the script, until it is overridden by another assignment.

When a variable is created from another variable, the latter must be defined in the global context of the script, otherwise an empty value will initialise the new variable.

A combined literal form can call existing context variables. Sub-variable calls are replaced by those found in the context at execution time.

None

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