XSLT is called as Extensible Stylesheet Language Tranformations.

XSLT is a language to transform an XML document to another documents, like XML documents, HTML documents, Text Documents etc.,

Its a transformation language mainly used for transformation.

For transformation of a XML Documents, the following file formats are used.

1. An Input XML document which needs to be converted. (.xml)
2. XSLT document which contains the conversion logic., (XSLT language) usually has .xsl extension.
3. An Output HTML, XML will be generated when XLST file is applied on the input XML.