LDN - Luminis Developer Network

We have started to make many modifications to Banner channels (.car files).  One in particular is the Time Reporting channel, as we are implementing Web Time Entry on our campus.  Throughout the .car files for the Banner channels, there are references to '/CHANNELDATA/TXT'.  Such as:

<xsl:variable name="time_sheet_txt" select="/CHANNELDATA/TXT/TIME_SHEET_TXT"/>

Can anyone here shed some light on where this actual CHANNELDATA can be found?

Thanks in advance.