--- branches/development/src/selection/SelectionToken.hpp	2011/09/14 21:15:17	1629
+++ branches/development/src/selection/SelectionToken.hpp	2013/03/28 20:54:06	1854
@@ -35,8 +35,9 @@
  *                                                                      
  * [1]  Meineke, et al., J. Comp. Chem. 26, 252-271 (2005).             
  * [2]  Fennell & Gezelter, J. Chem. Phys. 124, 234104 (2006).          
- * [3]  Sun, Lin & Gezelter, J. Chem. Phys. 128, 24107 (2008).          
- * [4]  Vardeman & Gezelter, in progress (2009).                        
+ * [3]  Sun, Lin & Gezelter, J. Chem. Phys. 128, 234107 (2008).          
+ * [4]  Kuang & Gezelter,  J. Chem. Phys. 133, 164101 (2010).
+ * [5]  Vardeman, Stocker & Gezelter, J. Chem. Theory Comput. 7, 834 (2011).
  */
 
 #ifndef SELECTION_TOKEN_HPP
@@ -141,6 +142,7 @@ namespace OpenMD {
     const static int none         = expression | 10;
     const static int name         = expression | 11;
     const static int hull         = expression | dynamic | 12;
+
     // miguel 2005 01 01
     // these are used to demark the beginning and end of expressions
     // they do not exist in the source code, but are emitted by the
@@ -154,6 +156,9 @@ namespace OpenMD {
     const static int y            = atomproperty | dynamic | 3;
     const static int z            = atomproperty | dynamic | 4;
     const static int r            = atomproperty | dynamic | 5;
+    const static int wrappedX     = atomproperty | dynamic | 6;
+    const static int wrappedY     = atomproperty | dynamic | 7;
+    const static int wrappedZ     = atomproperty | dynamic | 8;
         
     const static int opGT         = comparator |  dynamic | 0;
     const static int opGE         = comparator |  dynamic | 1;