--- a/libidav/davqlparser.h	Sat Apr 04 20:37:03 2015 +0200
+++ b/libidav/davqlparser.h	Sat Apr 04 21:47:40 2015 +0200
@@ -207,6 +207,12 @@
 /** Infinity recursion depth for a DavQLStatement. */
 #define DAV_DEPTH_INFINITY -1
 
+/** The with-clause contains an unknown attribute. */
+#define DAVQL_ERROR_UNKNOWN_ATTRIBUTE 20
+
+/** Depth must be greater than zero or infinity. */
+#define DAVQL_ERROR_INVALID_DEPTH 21
+
 /** A quote symbol (' or `) is missing. */
 #define DAVQL_ERROR_MISSING_QUOTE 50