The table of contents for the help is implemented being implemented in two ways for the purpose of testing. The first method uses the <ul> element to present the table of contents as a set of bullets.
The second method uses <table> elements to present the contents in a more standard visual form, as you might find in a book. Table-less layout is a big deal but W3C says that tables are appropriate for tabular data. I think a table of contents qualifies.
Either way, there are going to be a lot of nested tags.
Which approach is better? As far as I can see, neither approach scales better/worse than the other.
[Also, this help is under construction. You will find things that don`t yet work.]
Scaling is important because there are around 500 pages already and 1000 graphics. The page count will increase over time. [The site makes heavy use of server side includes.]
Some technical writers have commented that the <ul> based design doesn`t have the right look/feel for a table of contents and that the <table> based design is better.