scope:

This International Standard defines the syntax and semantics of the JT Version 9.5 file format. At its core, the JT format is a scene graph with Computer Aided Design (CAD) specific node and attributes support. The following are within scope of this International Standard: - facet information (triangles), stored with geometry compression techniques; - visual attributes such as lights, textures and materials ; - product manufacturing information (PMI); - boundary representation (b-rep) solid model shape representations and associated metadata; - configuration representations; - delivery methods such as asynchronous streaming of content. The following are outside the scope of this International Standard: - the implementation of, or definition of a run-time architecture for viewing and/or processing JT data; - long term data retention; - non-faceted geometric data exchange.