xml.hwp is one of the first Hollywood plugins and was written by Andreas Falkenhahn. It was originally written as a proof-of-concept for Hollywood 5's new library plugin interface. Later it was expanded to support Hollywood 9's new serialization interface to conveniently serialize XML documents to Hollywood tables and the other way round. Thanks have to go to Roberto Ierusalimschy, Andre Carregal and Tomas Guisasola for their LuaExpat plugin on which the library interface of xml.hwp is based.
If you want to contact me, you can either send an e-mail to andreas@airsoftsoftwair.de or use the contact form on http://www.hollywood-mal.com.