You can then render the ‘dot’ file with the Graphviz graph drawing tools (I recommend the Macintosh port of Graphviz) and you get a diagram of the dropped item’s contents and sub-contents. You might be able to open the ‘dot’ file using Omnigraffle (it supports a subset of the DOT language — I haven’t tried it yet!).

I found it handy to visualise the inventory of the files in a website I was redeveloping; it produces fairly plain output that is probably most useful as a starting-point.

When you click a link in one of the blue boxes on the home page and then return to the homepage, that blue box will be a shade darker. The idea is that over time the boxes will adapt to show you which areas you work with most, which seems like a form of personalization to me, adapting to user behavior.

When I first saw a web-browser, I was immediately impressed by link colours changing to indicate history. Sad but true. It’s a shame this built-in navigational aid isn’t exploited on the BBC homepage too.