It's possible that these adjustments were made in Lightroom, in which case it may be able to read this proprietary data.
Not only just for Photoshop Lightroom by or in itself for it's own propriety info, it is also useable with Photoshop CS5 and some other image editing apps that understand XMP data. If I recall that, a couple years ago, Adobe and few other software development companies including Microsoft and possibly Apple had a group of software engineers discussed on the topic. But at the moment, I could not find the source of info that mentioned this now. However, I remember this that it had been discussed a couple years ago. It is possible that Adobe probably have a link to that somewhere at Adobe website for that matter.
In closing, XMP Metadata is a set of standardized information about a photo, such as the author’s name, resolution, color space, copyright, and keywords applied to it. Perhaps it is well worth to do a research on it and get most out of it on your own.
Perhaps that someone could chime in and correct the unbiased info better than I do.
Hope that helps.
Brian