[tracker] libtracker-data: Added some comments clarifying the code

[Philip Van Hoof <pvanhoof src gnome org>]

commit 6e2f7069e99c7767cb7c8587fb92b3988c79a3a1
Author: Philip Van Hoof <philip codeminded be>
Date:   Wed Nov 10 14:14:54 2010 +0100

    libtracker-data: Added some comments clarifying the code

 src/libtracker-data/tracker-data-manager.c |   14 +++++++++++++-
 1 files changed, 13 insertions(+), 1 deletions(-)
---
diff --git a/src/libtracker-data/tracker-data-manager.c b/src/libtracker-data/tracker-data-manager.c
index b8ec57c..3946427 100644
--- a/src/libtracker-data/tracker-data-manager.c
+++ b/src/libtracker-data/tracker-data-manager.c
@@ -681,7 +681,9 @@ tracker_data_ontology_load_statement (const gchar *ontology_path,
 				}
 
 				/* This doesn't detect removed rdfs:subClassOf situations, it
-				 * only checks whether no new ones are being added */
+				 * only checks whether no new ones are being added. For 
+				 * detecting the removal of a rdfs:subClassOf, please check the
+				 * tracker_data_ontology_process_changes_pre_db stuff */
 
 				if (found == FALSE) {
 					handle_unsupported_ontology_change (ontology_path,
@@ -786,6 +788,11 @@ tracker_data_ontology_load_statement (const gchar *ontology_path,
 			}
 		}
 
+		/* This doesn't detect removed tracker:domainIndex situations, it
+		 * only checks whether no new ones are being added. For 
+		 * detecting the removal of a tracker:domainIndex, please check the
+		 * tracker_data_ontology_process_changes_pre_db stuff */
+
 		if (!ignore) {
 			if (!had) {
 				tracker_property_set_is_new_domain_index (property, class, in_update);
@@ -933,6 +940,11 @@ tracker_data_ontology_load_statement (const gchar *ontology_path,
 			return;
 		}
 
+		/* This doesn't detect removed nrl:maxCardinality situations, it
+		 * only checks whether the existing one got changed. For 
+		 * detecting the removal of a nrl:maxCardinality, please check the
+		 * tracker_data_ontology_process_changes_pre_db stuff */
+
 		is_new = tracker_property_get_is_new (property);
 		if (is_new != in_update) {
 			/* Detect unsupported ontology change (this needs a journal replay) */