The XML document types obtained from the feed are uniquely identified
by their DTDs. We currently support documents with the following DTDs:
.IP \[bu] 2
+AutoRacingResultsXML.dtd
+.IP \[bu]
Auto_Racing_Schedule_XML.dtd
.IP \[bu]
Heartbeat.dtd
CBASK_AssistsXML.dtd
.IP \[bu]
Cbask_Awards_XML.dtd
+.IP \[bu]
+CBASK_BlocksXML.dtd
.RE
.P
The GameInfo and SportInfo types do not have their own top-level