load plugins, build plugin hash table

  load appropriate body.aXML

  while ( commands_remain_unprocessed )
    {
     for each plugin_name in plugins hash
        {
         scan using a regex for a corresponding tag
         making sure it does not contain any subtags
          
         if tag has been found that is ready to be 
             computed 
           {
            eval the code from the plugin file, passing it
            the data from inside the tag and any attribute 
            values

            place the $result back into the document
            in the place of the original tag&data
           }
        }
    }