2013-05-03, 06:12:58
I really do not see the major issue here, ( aside from using a unique filestore like I already mentioned as the best solution. )
If you need 3 level, could you not handle this with a rewrite rule for 3 levels and convert to prefixed segmented slugs. level1_level2_slug.xml
If you need 3 level, could you not handle this with a rewrite rule for 3 levels and convert to prefixed segmented slugs. level1_level2_slug.xml