[boost] [Boost-docs] Internal linkage with quickbook/boostbook

I've noticed that internal links in the docs I've been building default to the form: <a href="page_name.html#anchor_name">...</a>. I'm curious as to why they don't omit 'page_name.html': I can't see the requirement for that in the HTML specs (I haven't read XSTL/XML/etc yet) and think most browsers handle links properly when they're of the form: <a href="#anchor_name">...</a>. Any comments? Darren NB. This makes a difference when accessing www.example.com and ''index.html' is fetched implicitly: internal links then appear different to the browser, requiring another fetch.