INCLUDINGTOPIC -- name of topic that includes current topic
The name of the topic that includes the current topic - same as %TOPIC% in case there is no include
If a topic is used in a chain of INCLUDEs, INCLUDINGTOPIC is set to the topic directly INCLUDing this one, NOT the topic that has been requested by the user (which is set in BASETOPIC)
WARNING: While this Macro may appear to work, unless you require the subtle difference between INCLUDINGTOPIC and BASETOPIC, you probably should use BASETOPIC.