Station numbers and the DTD

Hi, I am working on WebVCR+, which uses XMLTV to get its listings.  
There is a problem however, which I thought I had fixed.  You see, I 
need the station number for an individual channel, in order to turn to 
that station using the TV card / IR remote.  However, in the XMLTV DTD, 
the channel element has no station number attribute, just an "id" which 
can be anything.  I was using XMLTV listings from tv_grab_na which puts 
the "id" in the form "stationnumber stationname", which I was parsing to 
get the station number, since I had never looked at the XMLTV DTD 
before.  It was brought to my attention though that if there existed any 
other rippers, I couldnt use them unless they used this undocumented 
format.  

My question is this, is there any way I can reliably get the station 
number from an XMLTV document?  If not, is there any reliable way at all 
that I can get a station number?

Pyroman[FO]