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Subject: Re: Next Generation DNG to work with Lightroom



Barry:

Thanks for helping me understand the use of XMP and the need to apply XMP to JPEG.

Right now XMP metadata can be stored in a DNG file or it can be stored in a sidecar file. The most important item for me in this thread is that I don't want to be forced to use a sidecar file for JPEGs adjusted in LR. This is why I have thought about the matter in terms of DNG becuase as DNG does away with sidecar files for RAW files, I want the same functionality for other LR formats. So long as Adobe can provide a solution requiring no sidecar XMP metadata files for these new file formats adjusted in its extended ACR module in LR, I will be a very happy customer. I haven't played much with JPEG along these lines and maybe I am up in the night becuase I don't have a sound grasp of the concept. (Take for instance TIFF which includes XMP data inside the file. Because TIFF is a known standard, there is no chance of overwriting base file data with XMP metadata inside a TIFF file). I appreciate these Adobe fora for expression and understanding.

BTW: I realize DNG is currently a RAW file format. I also recognize that ACR is currently exclusively used for RAW file formats. It appears that LR is about to change the use of ACR corrections -- the LR Develop module is going to allow the ACR adjustments to a variety of file formats. I just need to have Adobe permit adjustments to JPEG files without doing violence to the base JPEG image AND with the adjustments attached to the file.

Thanks again.

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