Overview

IGES entities with known type and form numbers are read into classes as described in the type table. Certain invalid forms are recognized and read into an appropriate class as described below. All other invalid types or forms are preserved as instances of null_entity with a complete string image of the directory entry data.

Invalid but recognized forms with corresponding instance type:

• Type 102 Form 1 - composite_curve_entity
• Type 314 Form 1 - color_definition_entity