A page topic is any place within your text that you want marked. Topic related elements are:
Wiki
Result
[topic topic_name]
Creates a topic mark.
[[goto topic_name]]
topic_name. Jumps to topic_name.
[[goto topic_name][my topic]]
my topic. Jumps to topic_name.
[[goto topic_name][img repository(/powered.png)]]
. Jumps to topic_name.