Hi Inkscapers,
  I was just talking with a friend while he is working on some diagrams in inkscape, and he wants to be able to have items in multiple groups.  (This is a network diagram, so for example it would be nice to have a set of all nodes, to be able to change color and style, but then also put various subnets of nodes into their own groups so they can be transformed as a unit.)  Looking into it a bit it seems that this is really a limitation of the way svg handles groups, and since both groups and layers in inkscape are implemented with svg groups I guess it's not possible to use a set oriented approach like this?  Any ideas why groups are limited in this way within the svg spec?  I can imagine a number of situations in which it would be nice to change style attributes or script or transform on different sets of potentially overlapping objects.  Any thoughts on this?

-Jeff