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X - Glossary of Technical Terms Starting with X
#XML
XML stands for Extensible Markup Language. XML is a file format that allows you to exchange electronic information between computers and/or applications. It's a specific way to structure data, in the form of plain text, readable by both programs and humans. XML is used, for example, for RSS feeds and search engine sitemaps
Note: XML closely resembles the format of HTML, but there is an important difference. XML is for sharing data, while HTML is for formatting data.
Relevant:
#HTML