I am sure I have read this somewhere, but can't find it anymore...
... and I apologise if I ended up in the wrong forum...
While I understand that links like this one "/show.asp?topic=1" need some work, I'd still like to ask, which URL design to chose
1. My pages follow this pattern "/show.asp?topic=1"
2. I am getting duplicate meta / title notifications, because someone / something links to my site like this: "/?topic=1"
3. In light of the possibility of me changing to a .php extension, it might be actually a good idea to promote the shorter version "/?topic=1" which would work no matter, whether the page is driven by ASP or PHP.
Nota bene: the PHP idea is taking shape due to the limits of URL rewriting in ASP...
... still, any pointers / feedback appreciated on how to go about the two versions of URL design