Thank you! So let us wait when this restriction of the SVG format will be circumvented by Inkscape, perhaps via some plug-in.

Dear prkos and kelan, thank you very much. It is a pity that such a simple operation as drawing a lattice, which is transparent to do in corel (iirc), can not be realized in principle with Inkscape. If I understand correctly, the reason is exactly the impossibility to join more than 3 nodes. I wonde...

How to create a hexagonal lattice (network) such that its nodes can be freely moved, i.e. the lattice could be arbitrarily deformed? My failed attempts to create one reduce to: 1. Create a pattern from hexagons. However, the nodes can not be moved, even after transforming the pattern to path (via ob...