Program guide service?

Question

Microsoft

Somehow here flashed an article on setting up a guide for Windows Media Center. Taking note of the methods used there, I once drew my own solution: collecting data from several sites (tv.mail.ru, tv.akado.ru, etc.) and converting it into a universal format that Tvxb easily hawks.
However, almost none of the sites gives the level of detail that the program guide that MCE downloads itself has. But it doesn't even have half the channels on my cable.
What are the detailed program guide services with the maximum number of channels and information? Are there any that immediately give data in the desired format (for the program)?
I'm starting to think that if there is nothing like this in nature, then it would be nice to implement it :)
UPD. What specialized formats exist for this topic? Preferably with links.

Answer 1

A detailed program is a product for which the same portals and newspapers pay money.

Answer 2

There is no such thing, I myself use a car with WMC instead of a TV. No matter how much I searched, I did not find it.
A program parser was written from the site of my cable provider - at least something.

Answer 3

Of the formats for TV programs, I came across xmltv and jtv.
I found a rather large (overlapping my needs) list of TV channels on star.poltava.ua/
Not really a service, but there are weekly file updates in two formats.