Comment 8 for bug 591595

Thank you.

#1 would be very useful for what I was trying to, although, it would not necessarily be for someone who is manually changing references on purpose. So I still think that issuing a warning dialog would be more appropriate, as I described in my feature request: https://bugs.launchpad.net/inkscape/+bug/591639.

As for #2, when I went in and changed the `xlink:href`s manually to reflect the new IDs, the document DID update live, and very quickly, i.e. it didn't seem to tax my system (which isn't very fast) so I don't think performance would suffer; it's just a matter of having it happen when a change de-references an object, not just when it (re-)references one.