What pattern is this?

[Dunmail]

I came across a site where all the pages had URIs that looked like index.php?page=notes, index.php?page=guide I know what it does and how it works but I don't know what the pattern is called, if indeed it does. I'm tempted to call it a template pattern but that doesn't bring up any relevant hits.

 

[UTclassof89]

I think URL query string is the term you're looking for? (where a variable is appended to the URL with a question mark)