Comment 5 for bug 622589

Layers should not be converted in groups. Groups and Layers are very different things.

Suggestion: add a new attribute applicable to ALL ELEMENTS to the Inkscape namespace, called "inkscape_layer".

Each element should have the attribute inkscape_layer set to the layer it belongs to, indipendently from the group hierarchy. This would allow creating groups with many layers (i.e. useful in multi-layered buttons... a button made of 4 layers must be a single group).

All the layers would be listed at the beginning of the SVG file, in a special section defined in the namespace called "InkscapeLayersList".