title: What characters can one use in a URL?
body: <p>I have an application that takes all the parameters in the url like this: <code>/category/subcategory/sub-subcategory</code>. I want to be able to give out extra parameters at the end of the URL, like <code>page-2/order-desc</code>. This would make the whole URL into <code>cat/subcat/sub-subcat{delimiting-character}page-2/order-desc</code>.</p>
  
  <p>My question is: what characters could I use as <code>{delimiting-character}</code>. I tend to prefer ":" as I know for sure it will never appear anyplace else but I don't know if it would be standard compliant or at least if it will not give me problems in the future.</p>
  
  <p>As I recall vimeo used something like this: <code>vimeo.com/video:{code}</code> but they seem to have changed this.</p>