sentence: extensible stylesheet language - a family of languages of which xslt is a member xquery and xslt compared xsl formatting objects or xsl-fo - an xml-based language for documents , usually generated by transforming source documents with xslt , consisting of objects used to create formatted output identity transform - a starting point for filter chains that add or remove data elements from xml trees in a transformation pipeline apache cocoon - a java - based framework for processing data with xslt and other transformers .