The first column is a decorated Affymetrix array name, i.e. the name which appears in the corresponding
drop-down list on the DAVID web site.
The second column is an actual DAVID URL address of the file containing the Affymetrix probeset IDs
Details
When the getAffyChipTypes gets called the first time within the R session,
it retrieves the set of annotation values from the DAVID web services, stores them
within the DAVIDAffyChipChoices data structure and then reuses it in subsequent calls.