I've created a system whereby an XHTML5 file containing instructions for the administrator has an ant task associated with it, such that if you put a batch of XML files in a particular folder and run the ant task, it builds the encoder package as a zip with the XML and the schema files. There's more to do here -- in particular, I want to make a parallel setup so that encoders can create a zip to send back to the administrator -- but the basics are working well.