Template processor
![A diagram illustrating all of the basic elements and processing flow of a template engine.](/Images/godic/202502/15/TempEngGen015.svg4720.png")
XSLT is a template processing model designed by W3C. It is designed primarily for transformations on XML data (into web documents or other output).
Programming languages such as Perl, Python, PHP, Ruby, C#, and Java support template processing either natively, or through add-on libraries and modules. JavaServer Pages, Active Server Pages, Genshi (for Python), and eRuby are examples of template engines designed specifically for web application development.