Yes, the intent -is- to provide layers just like in other applications. When we talk about using <g> nodes to group them, what we are talking about is merely how to store layer information in the SVG format.

Thorsten Wilms wrote:

I didn't catch the whole discussion about layers, I just hope I'm not totaly off here. However, layers can be seen as serialized selections and are in this aspect just like groups. But in vector graphics apps layers usualy establish z-order 'compartments'. There is z order inside each layer, but the general z-order of each member of a layer is higher than those of members of layers below and lower than those of members of layers above.

Grouping is used to lock relative position of items and for scaling them all together. Layers are about organizing z-order, toggling visibility and locking. Visibilty and locking can of course work the same way for groups, it's just they are usualy not listed in vector apps.

It would be interesting to implement/express layers as special case of groups, but I have no idea how to go about toggable z-order compartment behaviour.

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Thorsten Wilms

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