本文件提供了物联网系统语义互操作性的基本概念，如ISO/IEC 21823-1的方面模型所述，包括:–语义互操作性核心本体的要求；–关于如何使用本体和开发特定于领域的应用程序的最佳实践和指导，包括考虑到可扩展性和与外部本体的连接的需要本体的跨领域规范和形式化，以提供现有本体的协调利用相关物联网本体，以及模块化、可扩展性、可重用性、可扩展性、与上层本体的互操作性等方面的特征和方法的比较研究； –展示语义互操作性必要性和需求的用例和服务场景。

This document provides the basic concepts for IoT systems semantic interoperability, as described in the facet model of ISO/IEC 21823-1, including: – requirements of the core ontologies for semantic interoperability; – best practices and guidance on how to use ontologies and to develop domain-specific applications, including the need to allow for extensibility and connection to external ontologies; – cross-domain specification and formalization of ontologies to provide harmonized utilization of existing ontologies; – relevant IoT ontologies along with comparative study of the characteristics and approaches in terms of modularity, extensibility, reusability, scalability, interoperability with upper ontologies, and so on, and; – use cases and service scenarios that exhibit necessities and requirements of semantic interoperability.