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XSLT (eXtensible Stylesheet Language Transformations) is a programming language for transforming XML documents into other structures. It works in conjunction with XPath, allowing XSLT to specify algorithms for processing XML data and generating presentation-oriented output like HTML or plain text. The language features a templating approach where rules are defined that match specific elements in the source document, indicating how those should be transformed or omitted from the result. XSLT supports complex operations such as conditional logic, iteration over sets of nodes, and pattern matching. Originally designed as part of the XSL (eXtensible Stylesheet Language) family of standards for formatting and styling XML documents, XSLT has found applications beyond traditional publishing environments into web development and general data manipulation tasks involving structured content.