XSLT 2.0
XSLT 2.0 is a declarative programming language used for transforming XML documents into other formats, such as HTML, plain text, or other XML structures. It is part of the XSL (Extensible Stylesheet Language) family and builds upon XSLT 1.0 with enhanced features like improved data types, grouping, and regular expressions. It operates by applying templates defined in an XSLT stylesheet to an XML source document to produce output.
Developers should learn XSLT 2.0 when working with XML-based data processing, such as in web publishing, data integration, or document conversion systems, where complex transformations are required. It is particularly useful in scenarios involving large-scale XML data manipulation, such as generating reports, converting between XML schemas, or integrating data from multiple sources, due to its powerful built-in functions and support for XPath 2.0.