diff --git a/perl-xCAT/xCAT/Schema.pm b/perl-xCAT/xCAT/Schema.pm
index e91fde465..4eed80c01 100644
--- a/perl-xCAT/xCAT/Schema.pm
+++ b/perl-xCAT/xCAT/Schema.pm
@@ -661,7 +661,7 @@ ppc => {
   hcp => 'The hardware control point for this node (HMC or IVM).',
   id => 'For LPARs: the LPAR numeric id; for FSPs: the cage number; for BPAs: the frame number.',
   pprofile => 'The LPAR profile that will be used the next time the LPAR is powered on with rpower.',
-  parent => 'For LPARs: the FSP/CEC; for FSPs: the BPA (if one exists).',
+  parent => 'For LPARs: the FSP/CEC; for FSPs: the BPA (if one exists); for BPAs: the building block (BB) which consists 1 or more service nodes and compute/storage nodes that are serviced by them.',
   supernode => 'Comma separated list of 2 ids. The first one is the id of the supernode the FSP resides in. The second one is the logic location number (0-3) within the supernode for the FSP.',
      comments => 'Any user-written notes.',
      disable => "Set to 'yes' or '1' to comment out this row.",