Text file similar to an .XSL document that contains XML style transformation information; used for transforming XML documents into a standard output format, such as a text document or an .HTML Web page.
Program(s) that open xslt files
Mac: FileMaker; Edit with a text editor Windows: FileMaker; Microsoft Visual Studio; Edit with a text editor
Information from FileInfo.com - The File Extensions Resource.
http://www.fileinfo.com/extension/xslt
