diff --git src/libcmis/json-utils.cxx src/libcmis/json-utils.cxx
index b537a09..b4e037d 100644
--- src/libcmis/json-utils.cxx
+++ src/libcmis/json-utils.cxx
@@ -213,48 +213,54 @@ Json::Type Json::parseType( )
 {
     Type type = json_string;
     string str = toString( );
-    boost::posix_time::ptime time = libcmis::parseDateTime( str );
-    if ( !time.is_not_a_date_time( ) )
-        type = json_datetime;
-    else
+    if ( str.empty( ) )
+        return type;
+    try 
     {
-        Type backupType = type;
-        type = json_bool;
-        try
-        {
-            parseBool( str );
-        }
-        catch (...)
+        boost::posix_time::ptime time = libcmis::parseDateTime( str );
+        if ( !time.is_not_a_date_time( ) )
+            return json_datetime;
+    }
+    catch (...)
+    {
+        // Try other types
+    }
+    Type backupType = type;
+    type = json_bool;
+    try
+    {
+        parseBool( str );
+    }
+    catch (...)
+    {
+        type = backupType;
+    }
+    if ( type != json_bool )
+    {
+        if ( str.find('.') == string::npos )
         {
-            type = backupType;
+            backupType = type;
+            type = json_int;
+            try
+            {
+                parseInteger( str );
+            }
+            catch(...) 
+            { 
+                type = backupType;
+            }
         }
-        if ( type != json_bool )
+        else
         {
-            if ( str.find('.') == string::npos )
+            backupType = type;
+            type = json_double;
+            try
             {
-                backupType = type;
-                type = json_int;
-                try
-                {
-                    parseInteger( str );
-                }
-                catch(...) 
-                { 
-                    type = backupType;
-                }
+                parseDouble( str );
             }
-            else
-            {
-                backupType = type;
-                type = json_double;
-                try
-                {
-                    parseDouble( str );
-                }
-                catch(...) 
-                { 
-                    type = backupType;
-                }
+            catch(...) 
+            { 
+                type = backupType;
             }
         }
     }