IoT-A Sample Clauses

IoT-A. The IoT-A project7 realizes an architectural reference model for the Internet of Things. The main focus of the project is the integration and interoperation of devices that are often stand- alone and not integrated due to heterogeneous standards and protocols. In this context, there exist several focus areas of the IoT-A project. First, the project aims to define a commonly agreed upon architecture of the IoT which is currently nonexistent. Another aim of the project is to realize a distributed orchestration mechanism to efficiently deal with real world dynamics and changing availability of IoT devices. Further, the designed architecture will enable interoperability between devices by hiding the complexity of the end-to-end heterogeneity from the communication service and providing translation mechanisms between technology-specific communication protocols. Additionally, the project develops a dynamic look-up and discovery mechanism for IoT devices. In order to reach interoperability and the sophisticated discovery of IoT entities a common architectural reference model for IoT is needed that represents a common domain vocabulary. In IoT-A, this model description is realized as OWL ontology. In [69] the authors describe semantic modeling for components of the IoT domain in the context of the IoT-A project with the help from the OWL-DL language. Therefore, they reuse certain concepts from other already existing ontologies and projects such as SSN-XG8 and SENSEI9. Mainly, the IoT information model designed in IoT-A is split into three different parts, entity, resource and service. As one of the main goals of the IoT is to extend the Internet into the physical world with devices and other physical entities being directly accessed and operated on from the 8 ▇▇▇▇://▇▇▇.▇▇.▇▇▇/2005/Incubator/ssn/ 9 ▇▇▇▇://▇▇▇.▇▇▇▇▇▇-▇▇▇▇▇▇▇.▇▇/ Internet, in IoT-A the so-called entity model describes the observable features of an entity. As such, information like location, temporal features or domain attributes are described in this model for a concrete device in the physical world that is attached to it. The resource model in IoT-A further represents this entity in the digital world, and describes the physical type of the resource and its interfaces. The third part is the service model, which elaborates the service type and identifies services by inputs, outputs preconditions and effects. It also presents how to access a specific service and other technical details.