What's A Walkthrough For Prince Of Persia Revelations?

I'm not sure what you're asking, so I'll just answer everything I can.
A walkthrough (for POP:Revelations, or any other game) is a detailed guide written by a company (like Pima) or an individual, that covers all (or most) of the content of a game and tells you step by step (like you are being 'walked through' the game) how to progress in the given game. Some walkthroughs are written as the player is working his way through the game, some are written after the writer has beaten it (potentially several times to try to find extras). Either way, the author tries to cover everything they can in the game, and will usually give tips on tactics where necessary. Some are illustrated, some (the online ones usually) aren't.
When you are stuck on a game, and can't make any progress, if you learn how the author put the walkthrough together (by looking at the early parts), you can usually just search for the term describing the area you're in and just read about how to get past that part.

Now, the other assumed portion... What is an example of a walkthrough for Prince of Persia: Revelations (which is a PSP game of course, based entirely on the PS2 game Prince of Persia: Warrior Within)? These are pretty good...

http://www.supercheats.com/psp/princeofpersiarevelationswalkthroughs.htm

http://www.gamespot.com/psp/action/princeofpersiawarriorwithin/hints.html

If you can see them, just scroll down to the links under 'FAQ Walkthrough' or suchlike, click the link, and yer golden.
I hope I've been helpful, if so, please rate this answer appropriately.
Thank you, and good luck!