parid0924 | Sun, 02 Mar 2003 15:39:19
Built-in arcs are implicitly represented by the built-in property values that correspond to them. See parid0369 5.2.7.
Predefined arcs are represented by property (and their values) on predefined nodes.
Sorta stands to reason doesn't it? Hard to have a predefined arc without a place to put the information.