XMP-darktable Namespace Documentation?

[blue-j]

Is your feature request related to a problem? Please describe.

I'd love to get darktable's XMP namespace supported in ExifTool, as it's hard to work with otherwise.

Describe the solution you'd like

Provided documentation on the namespace so I can assist in getting it put into ExifTool.

Alternatives

Manually reverse-engineering as samples come by.

Additional context

[blue-j]

This is what I have seen so far:

xmp	namespace	field name	sample value
xmp	xmp-darktable	xmp_version	3
xmp	xmp-darktable	raw_params	0
xmp	xmp-darktable	auto_presets_applied	1
xmp	xmp-darktable	history_end	8
xmp	xmp-darktable	iop_order_version	0
xmp	xmp-darktable	masks_history
xmp	xmp-darktable	historynum	0
xmp	xmp-darktable	historyoperation	rawprepare
xmp	xmp-darktable	historyenabled	1
xmp	xmp-darktable	historymodversion	1
xmp	xmp-darktable	historyparams	000000000000000000000000000000000000000000000000ff3f0000
xmp	xmp-darktable	historymulti_name
xmp	xmp-darktable	historymulti_priority	0
xmp	xmp-darktable	historyiop_order	1
xmp	xmp-darktable	historyblendop_version	9
xmp	xmp-darktable	historyblendop_params	gz11eJxjYGBgkGAAgRNODGiAEV0AJ2iwh+CRyscOAAdeGQQ=

[ralfbrown]

The historyparams and historyblendop_params are binary blobs whose contents depend on the module and *version fields. I don't think there's any documentation of those contents beyond the actual source code.

[blue-j]

Does the list above include all the non-binary fields you use?

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