Support IDLs (Interface Description Languages) and SLD (Style Language Descriptions).
The IDLs are used to define data structure you create. Since each application is different, they are sometimes created by the client and sometimes by the server. A common IDL to use is JavaScript Object Notation (JSON), which is simple and very easy to learn and use.
SLD is a language in which you describe the layout of your application. SLD files are plain text files http://urdu1.tv/?URL=https://warriorplus.com/o2/a/vqvqcq/0?p=2754
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