ISO/IEC 23005-4:2018

Overview

ISO/IEC 23005-4:2018 - part of the ISO/IEC 23005 “Media context and control” family - specifies Virtual World Object Characteristics (VWOC) as an XML Schema–based language for describing avatars and virtual world objects. The standard defines the syntax and semantics for metadata used to characterize virtual objects in virtual environments. It focuses on description languages and vocabularies; the actual adaptation engine that consumes this metadata is explicitly out of scope.

Keywords: ISO/IEC 23005-4:2018, virtual world object characteristics, VWOC, virtual world metadata, XML Schema, virtual objects, avatars, media context and control.

Key Topics and Technical Requirements

• XML Schema-based metadata model: VWOC provides formal schema definitions to describe object structure, attributes and relationships in virtual worlds.
• Syntax and semantics: The standard documents both XML representation syntax and corresponding binary representation syntax for many types, ensuring consistent interpretation.
• Core object and avatar types: Detailed element types include virtual world object base types and extensive avatar metadata (appearance, animation, communication skills, control features).
• Specialized object characteristics: Definitions for sensory and behavior types such as VWOSoundType, VWOScentType, VWOHapticPropertyType, VWOBehaviorModelType, VWOControlType, VWOEventType, and animation resource descriptions.
• Common data types: Reusable primitives and complex types for haptics, animation descriptions, identifiers and resource lists.
• Schema wrapper and top-level conventions: Root elements, wrapper rules and examples showing valid XML instances and binary encodings are included to guide implementers.

Practical Applications and Who Uses It

• Developers and architects building virtual reality (VR), augmented reality (AR), gaming, simulation and training platforms use VWOC to standardize object metadata.
• Content creators and 3D asset pipelines adopt the schema to ensure interoperability of avatars and objects across engines and services.
• System integrators and middleware vendors implement the schemas to enable consistent metadata exchange between scene management, physics, animation and sensory subsystems.
• Researchers and standards groups use the vocabulary for experiments in , haptics, sound/scents and behavior modeling.