If you\'re using Google Analytics (not sure about other products), there is a difference between the following URLs:

\n

http://www.abc.com
http://www.abc.com/ (note trailing \"/\")
http://www.Abc.com/ (note casing)
http://www.abc.com/home/default.aspx (the canonical URL)

\n

Whilst it\'s tempting to \"funnel\" all of these into the same place using routing tables / regular expressions, this can cause problems when interpreting the analytics (same logical page appearing multiple times). A more robust approach is to define which URL you want, and then use an HTTP 301 to redirect non-canonical URLs through the URL.This then becomes the canonical URL for the page.

\n

NB This approach could obviously get out of control if you have different URL formats spread throughout your own site - the first step in getting this right is to ensure that wherever you explicity reference a page within your site you use the canonical URL. This approach is really designed to clean up up poor external references.

\n

User Interface Design (UID)