About the Gas Data Model

Network geometry

Network geometry is stored in the GA_POINT (for nodes) and GA_LINE (for edges) feature classes. These feature classes store geometry only, not attributes. They are related to the gas features for attribute information.

The rows of these tables are managed by the Utility API. Do not enhance geometry feature classes with customer columns.

The geometry feature classes build the network topology.

Network topology

Network topology is stored in the _NNOD (topology nodes) and _NLNK (topology links) features classes.

Only the point feature classes of the Point topic and the pipe feature class of the Pipe topic are part of the gas network topology.

Other feature classes such as the Protection, Site, and Facility topics, the Damage feature class of the Pipe topic, are not part of the network topology.

Gas objects

Gas objects are stored in the GA_POINT.FID_ATTR (utility points) and GA_LINE.FID_ATTR (utility lines) attribute feature classes. These have a relation to the associated point or line geometry feature class.

Control cables

The geometry for control cables is stored in the GA_C_LINE and GA_C_POINT feature classes.

Attributes are stored in the GA_C_CABLE and GA_C_CABLE_POINT feature classes.

The geometry feature classes build the network topology.

Model tables

Model tables store several types of a particular network item. They are located in the Administration topic under Manufacturer and have the suffix _MODEL. See also Data Model: Model Tables.

Dimensioning

Dimensioning is stored in feature classes with the suffixes, _L (lines), _P (points), and _HL (help lines).

Domains

Domain tables have the suffix _TBD and contain lists of available attribute values for combo boxes in forms.

Labels

Label tables have the suffix _TBL and contain feature labels.

Feature Rules

Client-side feature rules customize behavior.