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Saved Settings are the .xmp data used to create a Snapshot of a series of edits in Camera Raw. As far as documentation, other than what might be in the DNG Spec and/or the DNG SDK (available at the DNG Product Page) I doubt there is any...
No, that is not in the DNG specs. I already had a look.
Well, that's a pity ... :-(
The specifications are in the document named XMP Specification Part 2, Standard Schemas
You can find it on the Adobe site, if you search with this name. Sorry, I don't have the URL; I saved the document, not its address.
Is this spec kept up-to-date with all of the changes introduced by new revs of ACR?
No, they're not in this document. The crss schema isn't described there. There is only the crs schema.
The crss schema isn't described there. There is only the crs schema
I'm sorry; I assumed that Adobe updated the documentation in the meantime. I guess the meaning of "open standard" is, that it is open to anyone to write the documentation.
The XMP specifications tells (page 26) that one can extend XMP by adding new schemas. That's Adobe did for ACR in Lightroom, but it didn't document his schema...
I guess the meaning of "open standard" is, that it is open to anyone to write the documentation.
Well, considering that "Camera Raw Saved Settings" are not specifically a function of DNG I think that comment is inaccurate and unfair. XMP allows new and custom name spaces and fields as part of the XMP specification (which is not directly tied to the DNG spec). The fact that Adobe has chosen to extend (XMP = EXtensible Metadata Platform) the XMP fields to include CRSS (Camera Raw/Lightroom "Snapshots") is more a proof oc concept of the usefulness of XMP metadata and less am indictment of DNG's "openess".
Snapshots in ACR/LR are proprietary and thus are prolly intentionally "undocumented", don't ya think?
If you want to see what _IS_ stored in DNG/XMP, the "crs schema" should be able to enlighten you...
I don't think that crss is intentionally undocumented. It's just a transltion to XML of the the diverse parameters in the Development module. I rather think Adobe has been too lazy to document it.