ISO/AWI 10303-63

Automation systems and integration — Product data representation and exchange — Part 63: Integrated generic resource: Isogeometric analysis representation

Scope

This document specifies the integrated generic resource constructs for isogeometric analysis representation. These constructs support the representation of geometric models using isogeometric analysis methods, including NURBS-based surfaces and volumes, parametric representations, and analysis-suitable geometric descriptions.
The following are within the scope of this document:

the specification of isogeometric analysis geometric models and their parametric representations; 
the definition of NURBS surfaces, volumes, and curves suitable for analysis; 
the specification of control point structures and weight definitions for isogeometric elements; 
the association of parametric spaces with physical coordinates for analysis purposes; 
the definition of knot vectors and basis function specifications; 
the specification of refinement operations for isogeometric analysis meshes; 
the representation of boundary conditions and constraints in parametric domains; 
the specification of material property assignments within isogeometric representations; 
the definition of analysis-specific geometric transformations and mappings. 

The following are outside the scope of this document:

the definition of specific analysis solvers or numerical methods; 
the specification of analysis results or solution data; 
the implementation details of isogeometric analysis algorithms; 
the definition of specific CAD system geometric representations; 
the specification of visualization or rendering methods for analysis results; 
the definition of specific file formats for isogeometric analysis data; 
constraints on the mathematical validity of NURBS representations.