You can also convert existing HTML pages to XSLT pages. For example, if you have a predesigned static page to which you want to add XML data, you can convert the page to an XSLT page, instead of creating an XSLT page and redesigning the page from scratch.
Dreamweaver opens a copy of the page in the Document window. The new page is an XSL style sheet, saved with the .xsl extension.