I'm not sure if that data is in the correct format for use as a sidecar file, but it does make it easier to view. With the right software, you can even extract the XMP data to a file. Little things like what split toning you used or the fact that you added linear or circular gradients to the image may not be something you want to divulge to the whole world. Most people may not care if anyone sees what they did to edit an image. In the words of Ron White: "I was wrong." I think Adobe should make this a bit more clear in the export dialog, as it's not exactly obvious. I had assumed this meant the default EXIF information from the raw file, such as camera, lens, shutter speed, aperture, etc. The "Camera Raw Info" is the XMP information. "All Metadata" includes everything, which is where I made a mistake. "All Except Camera Raw Info" and "All Except Camera & Camera Raw Info" would exclude the camera model and camera model/XMP, respectively. The first two, "Copyright Only" and "Copyright & Contact Info Only," are self-explanatory. The Lightroom Export Dialog Metadata section includes the following options for what you want to include:
The default export setting for metadata when creating an export preset depends on what preset you have selected, but if no preset is chosen when clicking "add," it usually defaults to "Copyright Only." I wanted all the EXIF and IPTC information included, so I chose "All Metadata" when exporting the images. When you look at Lightroom's Metadata panel, you don't see development edits or adjustments. Yes, this was a mistake on my part, but an understandable one. The information was included in my export because I selected "All Metadata" in my export preset. It's basically the same information that is inside a DNG file. Lightroom, Photoshop, and other programs can read this information and apply those edits to an image. This XMP information can be included inside TIFF, JPEG, PNG, GIF, PDF, and WEBP files or simply included as a separate sidecar file. The XMP file format is XML, which means that it is plain text. XMP stands for Extensible Metadata Platform, a standard "for the creation, processing, and interchange of standardized and custom metadata for digital documents and data sets," as per Wikipedia. I dropped one of my exported JPEG images on the program, and lo and behold, there was the XMP data of all my edits, even though I don't use XMP sidecar files. I was working with a development library, reading and writing the various EXIF values of an image through code.
I recently had one of those truly WTF moments. That's right, all of your adjustments, spot healings, tone curve adjustments, sharpening, etc. might all be in your exported files for all the world to see. All of your Lightroom development settings might be in your exported images.
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