XML
XML (Extensible Markup Language) is a popular choice for XHRs, simply because it is the standard intermediate language that all programming languages are able to share. It is also supported both on the server side and client side, which makes it the most flexible solution. XML is essentially a custom tag-based structure that you, the developer, define. XML’s tag-based structure is similar to that of HTML, except that HTML has predefined tags that represent its structure, such as the head, the body, tables, and so on. The following is an extremely simple example of an HTML table, which could easily be translated or used as XHTML:
<table><tr><td></td></tr></table>
XML can be passed between the front end and the back end for easy communication ...
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