-% Inform in four minutes
+o% Inform in four minutes
% Roger Firth <roger@firthworks.com>
A quick reference to the Inform programming language.
A property variable inherited from an object's class is
addressed by *object.class::property*; this gives the
original value prior to any changes within the object.
+
+Manipulating the object tree
+----------------------------
+
+To change object relationships at run-time:
+
+ move object to parent_object ;
+ remove object ;
+
+To return the parent of an object (or nothing):
+
+ parent(object)
+
+To return the first child of an object (or nothing):
+
+ child(object)
+
+To return the adjacent child of an object's parent (or nothing):
+
+ sibling(object)
+
+To return the number of child objects directly below an object:
+
+ children(object)
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