N. A. Aznauryan Sergei D. Kuznetsov L. G. Novak Maxim N. Grinev SLS: A numbering scheme for large XML documents. 8-18 2006 32 Programming and Computer Software 1 http://dx.doi.org/10.1134/S0361768806010026 db/journals/pcs/pcs32.html#AznauryanKNG06