schema tree BUGFIX atoms are all traversed nodes
diff --git a/src/xpath.h b/src/xpath.h
index 4c5db91..8278fb8 100644
--- a/src/xpath.h
+++ b/src/xpath.h
@@ -224,6 +224,7 @@
             struct lysc_node *scnode;
             enum lyxp_node_type type;
 
+/* _START and _ATOM values should have grouped values */
 #define LYXP_SET_SCNODE_START         -2 /**< scnode not traversed, currently (the only node) in context */
 #define LYXP_SET_SCNODE_START_USED    -1 /**< scnode not traversed except for the eval start, not currently in the context */
 #define LYXP_SET_SCNODE_ATOM           0 /**< scnode was traversed, but not currently in the context */