Hm... I'm pretty sure that the original intention never was to make the
layers inside a group have coordinates relative to the group layer's
x,y coordinates. Moving a group in Krita just moves the contained layers.

So, I would simply amend this to "groups don't have x,y coordinates".


On Mon, 11 Jan 2016, Andrew Chadwick wrote:

There is some confusion in the GIMP bug tracker about how OpenRaster
layer stack offsets apply:

https://bugzilla.gnome.org/show_bug.cgi?id=760348

Do we need some clarifying language in
https://wiki.freedesktop.org/www/Specifications/OpenRaster/Draft/LayersStack/
?


I propose:

---------------8< -----------------

x and y attributes

These attributes define the offset of the layer or stack relative to
its parent. These are signed integers with a default value of 0. These
attributes must not be set on the root stack element: the root stack
has zero offset.

The offset of a layer or a stack must be calculated relative to the
calculated offset of its parent stack. For the example above, the
"OpenRaster Logo" layer has coordinates (x=15, y=5) in the image's
coordinate system.

The X axis is oriented from left to right, and the Y axis is oriented downwards.

--------------->8 -----------------

It's probably worth having a para about Y having the usual computer
graphic interpretation too, so I added that.


--
Andrew Chadwick
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Boudewijn Rempt | http://www.krita.org, http://www.valdyas.org
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