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The application interpreted construct defined in this part specifies the interpretation of the generic resources in order to satisfy the following requirements:

• For the definition of an advanced boundary representation model. An advanced B-rep model is a representation composed of one or more manifold_solid_breps each of which is defined with elementary geometry or sculptured geometry.
• For the definition of the unbounded geometry of curves and surfaces used in the definition of the faces of such a B-rep model.
• For the definition of the topological structure of a B-rep model. In particular all surfaces are bounded by defining an associated advanced_face and all curves are bounded by reference from a topological edge_curve.

This AIC is independent of any industrial application domain.

The following are within the scope of this part of ISO 10303:

• 3D geometry;
• B-reps:
• B-rep models;
• B-spline curves and surfaces;
• conies;
• elementary curves;
• elementary surfaces;
• geometric transformations;
• polylines;
• pcurves;
• sculptured surfaces;
• surface curves;
• swept surfaces;
• twisted curves;
• unbounded geometry;
• use of topology to bound geometric entities.

The following are outside the scope of this part of ISO 10303:

• 2D geometry other than for the definition of a pcurve in the parameter space of a surface;
• bounded curves other than polylines and B-spline curves;
• bounded surfaces other than B-spline surfaces;
• offset curves and surfaces.