OObject identifier (OID) is an identifier to name an object with a hierarchically assigned namespace. In Internet of Things (IoT), thousands of IoT services based on heterogeneous resources will be provided as combination of various services. For efficiency, various technologies, such as service binding, dynamic services or frequently switching services will be required, along with resolution and identification of grouped services. Therefore, this draft Recommendation specifies an OID-based resolution framework for identifying various services in IoT environments. This draft Recommendation describes the concepts of IoT grouped services, considerations, architectures, and procedures for an OID-based resolution framework for IoT grouped services.