when you see for example "Adobe Color" in ACR/LR UI this XMP profile-preset is used : C:\ProgramData\Adobe\CameraRaw\Settings\Adobe\Profiles\Adobe Raw\Adobe Color.xmp inside : [quote] crs:CameraProfile="Adobe Standard" [end quote] this is the actual DCP camera profile on top of which XMP profile-preset operates also [quote] crs:SupportsAmount="False" [end quote] controls the slider you want : enabled / disabled --- if you take a look at some other XMP files, you can find tags like crs:CameraProfile="Default Profile" that let ACR/LR to select whatever was designated as base DCP profile elsewhere ( not in XMP itself ) and there some other tags of certain importance --- https://download.adobe.com/pub/adobe/lightroom/profile-sdk/ACR_and_Lightroom_Profile_SDK.zip take a look @ PDF doc inside .zip it goes deeper and provides more nuances like for example, quote : What happens if there is no specified DCP base? If you don’t specify a DCP base, your profile can be available for both raw and non-raw images. If applied to a raw image, it will still need a DCP in order to render. In those cases, it will use the default DCP for that image. For many images, that will be Adobe Standard; even if the user has specified a custom default profile for that camera model, enhanced profiles will still use Adobe Standard rather than that custom default. For cameras that do not have Adobe Standard profiles, the base DCP will likely be an embedded profile. --- so create your own XMP profile-preset ( just in case Adobe calls that Enhanced Profile ) and base it on your own (or canned) DCP camera profile and enable the slider to control the amount between "base" DCP camera profile of choice and your own "sauce" on top of it
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