HTML forms with XML

Hi All, 
We have XML files and corresponding schemas(xsd) and XSL's for them. Now we
need to use a product or build something that will generate a HTML form for
the schema. The end-users want to use HTML type forms or a online
mode(Applet) to enter the XML data, rather than install a product(like
XMLSpy) to enter HTML data.

Please advice if you have any ideas and/or information about such products.
Regards, Yogi.