Abstract
e-Health IoT sensor data represent entities which are evolving over time, and several healthcare applications require keeping a full history of such data. Moreover, e-Health IoT data can be considered big data and the JSON format is being considered as the best data format to represent big data and to facilitate their management, storage and exchange. However, there is no standard/consensual temporal model for e-Health IoT data, including JSON that lacks explicit support of time-varying data. Consequently, in order to manage big data histories and temporal e-Health IoT data, application developers have to proceed in an ad hoc manner. For that purpose, we propose in this chapter TJeH (Temporal JSON e-Health IoT data model), a temporal extension of the JSON data model, which supports the representation of temporal aspects of e-Health IoT data. Besides, and since TJeH is a logical model, in order to facilitate the work of both designers and database administrators of e-Health applications, we have also defined a graphical conceptual model for time-varying e-Health IoT data, named C-TJeH (Conceptual TJeH), associated with TJeH. C-TJeH makes the design of temporal JSON e-Health IoT data easy, with a conceptual model that provides a graphical user-friendly representation.
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