a new idea to fix my paper

only consider a 2-dimensional which indexes all bilets contained in XML data, the advantages are listed below:
1. small routing table
2. small update cost
3. uniform distribution of coordinates
4. small world links are cheaper and routing path length is under control
5. simplify the processing of the descendant axis query because no maximum length is needed any more
6. partial hierarchical information is encoded, and hierarchically similar bilets are close in the virtual space so as to facilitate queries with wild cards
7. element-attribute pair and attribute name-value pair are easy to encode in the overlay network
8. the limited size of the dimensionality avoids the curse of dimensionality
9. can employ existing selectivity measurement to facilitate queries (Ashraf Aboulnaga's work)