I have been giving some thought to the ways in which Help may be invoked by a software application. The ways I could think of were:

• open a particular topic by passing an integer
• open a particular topic by passing a string
• open a particular topic by passing a URL
• open a collection of topics at the home page
• open a 'found topics' list by passing a search string
• open a 'found topics' list by passing an index keyword
• open a particular topic by passing a topic title.

There may be minor variations of each of these methods, such as opening a particular topic in a specific window definition, or opening a particular topic in a tripane with the index displayed.

One other possibility would be to open a particular topic at a particular bookmark (anchor), in which case the anchor name might have to be passed as well as the context hook.

I wonder is there are other methods that I have missed?