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Portability

The ability to move an entity between different systems seamlessly to be used on the target system is termed as Portability. The entity could be data or application. Data stored in a particular database should be usable by many systems without the need to re-enter data. This can be achieved by using a common data format for sharing between different services. The syntax and semantics of the data are to be the same for easy of portability. XML is a common format used for data portability universally, and it works really well with multiple systems. Application portability can be defined as the ability to transfer a particular application and/or its components between different cloud services. The application should have the ability to be recompiled and re-linked to ensure ease of portability. Application Program Interfaces (APIs) are universally used routines, protocols and tools to make application portability easier. A good API contains all building blocks of that application to be recompiled and re-linked by different systems.
YouTube API is a classic example. It lets developers and users integrate YouTube videos and relative functionalities into websites or applications seamlessly. Usually, YouTube APIs include the building blocks for Analytics, Live Streaming, Data Capture, YouTube Player and Click Stream data. Anybody with an embed link (provided by YouTube) can easily integrate the YouTube video in their website or blog. It seamlessly ports all the necessary data and the application as a whole - across different hosting platforms.

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