grammar EPG {
    token TOP           { ^ [ <channel> ** \n ] \n? $ }
    token channel       { [ <channel_start> ] \n [ [ <entry> ** \n ] \n ]? [ <channel_end> ] }
    token channel_start { 'C' \s <channel_id> \s <channel_name> }
    token channel_id    { \S+ }
    token channel_name  { \N+ }
    token entry         {
        <event_start> \n
        <title> \n
        [<short_text> \n]?
        [<description> \n]?
        [<stream> [ [ \n <stream> ] ** 0..* ] \n]?
        [<timestamp> \n]?
        <event_end>
    }
    token channel_end   { c }
    token event_start   { 'E' \N* }
    token title         { 'T' \N* }
    token short_text    { 'S' \N* }
    token description   { 'D' \N* }
    token stream        { 'X' \N* }
    token timestamp     { 'V' \N* }
    token event_end     { 'e' \N* }
}