Data structure of network file

Discussion created by xbwei on Aug 5, 2012
Latest reply on Aug 6, 2012 by xbwei
I want to write some python program to read the attribute of a established network. I found the ArcGIS can build a network very quickly and generate a folder of ??????Newtork_ND.nd with some files of ???.nds.

How does those files store the topological relation of network, like the connected edges and junctions?