The wastewater data model contains the wastewater network topology, which is built from the point feature class (WW_POINT) and the section feature class (WW_LINE).
Wastewater network topology
Only the point feature classes of the Point topic and the section feature class of the Section topic are part of the wastewater network topology.
Network topology tables have the suffixes _NNOD (topology nodes) and _NLNK (topology links).
Other feature classes, such as the Protection or the Site feature classes, are not part of the network topology.
Achieving a Valid Network Topology
The topology requires that network points always lie at the start or end of a network line. A network point must never lie on a line. If you insert a network point on a network line, the line must be split at the insertion point. The consistency of the topology is maintained by feature rules.
If you remove a network point, you must merge the connecting lines.
For more information, see Intermediate Point, Split Lines, and Extract Points from Lines.
For more information about the feature rules, see Understand and Work with the Wastewater Data Model