XSLT is the abbreviation for Extensible Stylesheet Language Transformations. It is one of two parts of the XSL specification and is a language for transforming XML documents (actually the transformation part, T stands for transformation).
XSLT is a XML transformation language, which transforms documents in XML format. To transform in this context means to take all data or part of it (Query of a selection with XPath) and create another XML document or a document in a format which can directly be used for displaying or printing (e.g. an HTML, RTF or TeX document). In particular the transformations involve:
The XSLT processor checks which rules can be applied and executes the associated transformations based on a sequence of priorities.
An XSLT program is an XML document as the following template shows
<?xml version="1.0" ?> <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> ...