Missing specification in Inkscape & other technology options for use of imports and exports and interactions for other important programs and 2 non-plan are:
1) Synfig - 2D animation
2) Blender - 3D graphics and animation (matter how the curve svg
3) Gnumeric - spreadsheet (export in svg diagram chart)
also add that QCad commercial export the svg is not just Open Sorce but the mention!