I have read these pages
I know basic about URL,URN,URI! and little on their difference! but the thing I cannot understand is in a page like:
http://www.bernzilla.com/item.php?id=100which part is URL,URN and URI!
URI is whole part but URL and URN??
picture from wikipedia
a 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.
Now is id an attribute?what about application part? is php an application?