XSLT is an open standard programming interface to transform an XML document to another form of text. The input is always XML and the typical output is HTML, although it can be another XML (like SVG) or just plain text. XSLT itself takes the form of an XML document, which is compiled at the point of execution. A typical scenario would be one in which a preliminary XML is converted to HTML for better legibility.

XSLT is used by the Structure Editor to export the structure definition as HTML and by the MSC to present the verify log in HTML. In both cases a preliminary XML document is produced, which is then converted using XSLT to HTML.