diff --git a/lib/tpk/TPKLayer.js b/lib/tpk/TPKLayer.js
index e02d899..877ad1c 100644
--- a/lib/tpk/TPKLayer.js
+++ b/lib/tpk/TPKLayer.js
@@ -23,18 +23,22 @@ define([
             MAX_DB_SIZE: 75,                        // Recommended maximum size in MBs
             TILE_PATH:"",                           // The absolute path to the root of bundle/bundleX files e.g. V101/YOSEMITE_MAP/
             RECENTER_DELAY: 350,                    // Millisecond delay before attempting to recent map after an orientation change
-            DATABASE_ERROR_EVENT: "databaseErrorEvent",  // An error thrown by the database.
             PARSING_ERROR: 'parsingError',          // An error was encountered while parsing a TPK file.
             DB_INIT_ERROR: "dbInitError",           // An error occurred while initializing the database.
             DB_FULL_ERROR: "dbFullError",           // No space left in the database.
             NO_SUPPORT_ERROR: "libNotSupportedError",   // Error indicating this library is not supported in a particular browser.
-            VALIDATION_EVENT: "validationEvent",    // Library validation checks.
-            PROGRESS_EVENT: "progress",             // Event dispatched while parsing a bundle file.
             PROGRESS_START: "start",
             PROGRESS_END: "end",
             WINDOW_VALIDATED: "windowValidated",    // All window functionality checks have passed
             DB_VALIDATED: "dbValidated",            // All database functionality checks have passed
 
+            //
+            // Events
+            //
+            DATABASE_ERROR_EVENT: "databaseErrorEvent",  // An error thrown by the database.
+            VALIDATION_EVENT: "validationEvent",    // Library validation checks.
+            PROGRESS_EVENT: "progress",             // Event dispatched while parsing a bundle file.
+
             //
             // Private properties
             //