Yes, rather than a standard pagename (used for every namespace) like "start", "home" or "index", many people/systems will use the convention of using a file with the same name as the "container".
Then there is the question of location - should this "head page" be located *within* that container (in DW's case, filesystem folder = namespace), or *above* it in the parent, at the same level as the container? I ended up choosing the latter in my implementation.
My post here
http://forum.dokuwiki.org/post/28248 gives more detailed examples in the course of asking questions that I ended up answering myself, but anyone with comments or questions (here or there) would be most welcome.