Does Iphone use XML?

As someone interested in technology and particularly in the inner workings of devices like the iPhone, I have a question regarding the programming languages and frameworks utilized by Apple in its devices. Specifically, I'm wondering if the iPhone, known for its sleek design and powerful features, incorporates XML in any of its systems or processes. Could you clarify if the iPhone utilizes XML, and if so, in what contexts and for what purposes? I'm genuinely curious about the software architecture behind such a popular and sophisticated device.