Extended xmltv for androidtv

Hi,

would it be possible to genereate an extended xmltv file wich validates against this? 

https://github.com/googlesamples/androidtv-sample-inputs/blob/master/xmltv.dtd

It's an dtd for an extended xmltv format for androidtv. They basically added some elements and attributes to the normal xmltv format.

EDIT:

Sample xml

https://github.com/googlesamples/androidtv-sample-inputs/blob/master/app/src/main/res/raw/rich_tv_input_xmltv_feed.xml