Interoperability Aim The aim is to provide an overview of the current state of interoperability, existing and emerging standards, guidelines, surveys frameworks, white papers, and best practices related to XR and spatial computing. Objectives Map the current state of Interoperability in XR, from an XR infrastructure perspective, platforms, and systems Create awareness of lack and limitations of interoperability in the XR and spatial computing community/Industry and how this affects the development of XR solutions as well as accessibility. Assess whether interoperability affects accessibility in XR and spatial computing. Specific Objectives: To assess the existing state/landscape of interoperability within XR and spatial computing To identify, address and identify issues/challenges and emerging requirements. Methodology: Literature review, Mapping exercise