@@ -182,12 +182,21 @@ Figure 6.0-1 shows an architecture approach for an Interworking Proxy Entity (IP
The basic interworking enables applications that are connected to an oneM2M-based system to get data from sensors that are connected to an OGC/STA server. Furthermore, an application that is connected to an OGC/STA server will be able to get data from sensors that are connected to an oneM2M-based system.
<figcaption>Figure 6.0-1: IPE architecture overview with data flow</figcaption>
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## 6.1 OGC/STA-to-oneM2M Data Model Mapping
According to oneM2M TS-0033 [i.4] a representation of a non-oneM2M Proximal IoT function/device in a oneM2M-specified resource instance is to be synchronized with the entity that it represents.
This means that the OGC/STA data model is represented in the hosting CSE. The data in the OGC/STA server are organized as Sensing Entities [i.3] (see Figure 5.1-1: STA Sensing Entities data model).
The oneM2M structure for data models is a tree-structure where data are organized in containers or trees of containers.
The OGC/STA data model is a relational one, as used in databases, and not hierarchical. Thus, it creates a challenge for full interworking of all data captured in the OGC/STA data model.
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