Ericsson Ericsson Ericsson The Semantic Definition Format (SDF) enables ecosystem-independent descriptions of IoT device interaction capabilities. When a proxy mediates communication between applications and devices, it requires SDF definitions and ecosystem-specific mappings for translation. These definitions may contain privacy-sensitive information about devices and their interactions. This document defines an SDF extension for marking sensitive definitions and specifies mechanisms for generating privacy-preserving SDF documents that enable proxy operation without exposing sensitive information.