Xperia S: LCD and digitizer seperable?

Hello,

I asked the question before, but I accidentally entered the wrong model number, so I got an answer (thank you for that!), but unfortunately not regarding my phone.

So the question is:

My Sony Xperia S fell on the floor and now the screen is cracked. Is it possible to replace the digitizer alone (Like some samsung phones), or do I have to other the complete assembly LCD + digitizer because they are glued together (Like the iPhone 4)?

Thank you in advanced for you answer!

Kind regards