Is there a large degree of XML in Struts? Can you swap a stylesheet and switch form HTML to WML?

The Struts form tags are very much HTML oriented, because they only know how to generate HTML-style forms. One of the major focuses of 1.1 will be better integration with XML in many directions, including an investigation of using things like XPath, XForms, and so on. For integrating XSLT transformations, I would suggest utilizing the "xsl" tag library in the Jakarta Taglibs project <http://jakarta.apache.org/taglibs>. The <xsl:apply> tag is very powerful and flexible, and can interoperate with Struts cleanly.