I have read these pages:
I know basic about URL, URN, and URI; but little on their differences. The thing I can't understand is in a page like:
http://www.bernzilla.com/item.php?id=100 which part is URL, URN and URI!
URI is whole part but URL and URN??
Picture from wikipedia
An URL is a type of URI that identifies a resource via a representation of its primary access mechanism (e.g., its network "location"), rather than by some other attributes it may have.
It is now considered incorrect to use URL when describing applications.
id an attribute? What about application part? Is PHP an application?