Reference Document for Developers

[effeff70]

Hi there

Is there some sort of documentation around template variables on so on?
For instance, in my vb4 forum, I used the following statement to determine the current post is the first post:

<vb:if condition="$post[postcount] % $vboptions[maxposts] == 1">

Looking at the templates in vb5, I can see a bunch of different objects and I was wondering if there is an exhaustive or at least indicative list of objects, variables, etc.
I guess template developers would require such list...