Methods of cloud service integration by the example of healthcare

The article gives a review of traditional approaches to integration of many independent applications into a unified information system (IS), their merits and demerits. The approaches to integration of applications in the context of the unified IS and requirements for solution of this task based on constructing a special integration layer of an IS are described. The solution is built on the principles of the service-oriented architecture, allows to use modern integration products of different companies, and offers additional architectural tools of ranging. These tools give an opportunity of optimum loading of software and hardware tools of the integration layer, starting with small IS like enterprises and up to scaled geographically distributed IS. Particularly, the article shows possibility and expediency of using the integration layer mentioned above for implementing the unified state IS in the field of healthcare for serving the task of integration of its components into the unified IS.