Next and Previous topic in Reach

Hi,

I'm planning on adding next and previous links in Reach. Can you give me an idea how to do this?

I've created a customized skin in Reach, now aside from the table of contents i want to add a topic navigation (next and previous) in the document content itself. My problem is that, I don't know how to refer to the current topic's parent map and navigate to its siblings.

I can see that in the Table of contents, it has this property called lcinmap which is the parent map of the current topic. I've tried to look into how this property is being populated, it's value is based from @lc:inmap. However, it doesn't make any sense for me because I don't know what does this means. Is this some kind of magical property which is automatically extracted from the reach xml files?

Can you give me an overview how these things work and how can I do what I wanted?

Thanks,

Nikku