XSLT, a W3C standard, is a language for transforming XML into other formats.
XSLT stylesheets are written in XML syntax.
In the final stage of processing, the DITA Open Toolkit runs XSLT stylesheet transforms (using either SAXON or Xalan) to produce output files. In certain cases, it is possible to override stylesheet processing to customize the output.
The following figure shows the XSLT stylesheet for the note element.