XMP XMP is the extensible metadata platform from Adobe. It can be used to embed structured metadata into a file. I think it’s most common usage is for storing image metadata in image files, but it also has a use in embedding metadata in PDF files. Adobe provide an SDK that you can use to start coding applications for working with XMP. They provide a guide for developers, and I’ve posted a copy so you can have a quick look if you are interested, without downloading the full SDK. ... (more)