ISO/TC 184/SC 4/JWG 16 - Joint ISO/TC 184/SC 4 - ISO/IEC JTC 1/SC 24 - ISO/TC 171/SC 2 WG: Formats for visualization and other derived forms of product data

This document describes the COLLADA™ schema. COLLADA is a Collaborative Design Activity that defines an XML-based schema to enable 3D authoring applications to freely exchange digital assets without loss of information, enabling multiple software packages to be combined into extremely powerful tool chains. The purpose of this document is to provide a specification for the COLLADA schema in sufficient detail to enable software developers to create tools to process COLLADA resources. In particular, it is relevant to those who import to or export from digital content creation (DCC) applications, 3D interactive applications and tool chains, prototyping tools, real-time visualization applications such as those used in the video game and movie industries, and CAD tools. This document covers the initial design and specifications of the COLLADA schema, as well as a minimal set of requirements for COLLADA exporters. This document covers the following information: initial design and specifications of the COLLADA schema; requirements of COLLADA tools and a minimal set of requirements for COLLADA exporters; detailed explanations for COLLADA programming; core elements that describe geometry, animation, skinning, assets, and scenes; physics model, visual effects (FX), boundary representation (B-rep) of animation, kinematics. The document does not specify the implementation of, or definition of a run-time architecture for viewing or processing of COLLADA data.

This document defines a set of metadata to support the audit trail of the transformation of a geometry definition, while it is distributed and shared in supply-chains, to ensure the traceability of geometric model data. It also defines a set of web services based on the utilisation of these metadata. The following are within the scope of this document: — metadata definitions for geometry transformation audit trail: — syntax for storing these metadata in geometry data sets in various formats; — conformance level for implementers and business processes; — definitions of web services to query the geometric model data set and its associated metadata. The following are outside the scope of this document: — service specifications for CAD operations; — specifications of a cybersecurity infrastructure to enable web services; — the technical implementation of a STEP geometry services client or server; — any geometric model definition; — any product and manufacturing information (PMI) definition; — archiving.

This document analyses visualization elements that are key components of the interface between the physical asset and the avatar (digital replica of the physical asset).

ISO 14306:2017 defines the syntax and semantics of a file format for the 3D visualization and interrogation of lightweight geometry and product manufacturing information derived from CAD systems, using visualization software tools that do not need the full capability of a CAD system. ISO 14306:2017 has been adopted as a 3D visualization capability in addition to the ISO 10303 series. The file format supports the following information: · facet information (triangles), stored with geometry compression techniques · visual attributes such as lights, textures and materials · product manufacturing information, such as dimensions, tolerances and other attributes · boundary representation (b-rep) solid model shape representations. Several alternatives are available, including a representation based on the geometry standard defined in ISO 10303 · configuration representations · delivery methods such as asynchronous streaming of content ISO 14306:2017 does not specify the implementation of, or definition of a run-time architecture for viewing or processing of the file format.

ISO/PAS 17506:2012 describes the COLLADA schema. COLLADA is a COLLAborative Design Activity that defines an XML-based schema to enable 3D authoring applications to freely exchange digital assets without loss of information, enabling multiple software packages to be combined into extremely powerful tool chains. The purpose of ISO/PAS 17506:2012 is to provide a specification for the COLLADA schema in sufficient detail to enable software developers to create tools to process COLLADA resources. In particular, it is relevant to those who import to or export from digital content creation (DCC) applications, 3D interactive applications and tool chains, prototyping tools, real-time visualization applications such as those used in the video game and movie industries, and CAD tools. ISO/PAS 17506:2012 covers the initial design and specifications of the COLLADA schema, as well as a minimal set of requirements for COLLADA exporters.