"Home" or top-level help topic: Identifies the start of the top-level help topic.
<hometopic>heading topic text begins here ...
There is only one home topic for a help volume. It comes after the meta information (<metainfo>) and before the first <chapter> or <s1>.
The <hometopic> element does not support an author-defined ID. The HelpTag software assigns the predefined ID _hometopic.
To create a hyperlink to the home topic, use this syntax:
<link hyperlink= "_hometopic">...<\link>.
<hometopic>Welcome to Online Help This is the home topic for the online help ... <chapter>First Subtopic This is the first subtopic ... <chapter>Second Subtopic This is the second subtopic ... . . .