diff --git a/Libraries/iTasks/Extensions/Development/Codebase.icl b/Libraries/iTasks/Extensions/Development/Codebase.icl
index d926aa546914f21079f8d07ea833a6288c699cc5..40591e14fdd91f5c232789e9e8ff98fccf3cbdd4 100644
--- a/Libraries/iTasks/Extensions/Development/Codebase.icl
+++ b/Libraries/iTasks/Extensions/Development/Codebase.icl
@@ -12,13 +12,14 @@ where
 	toString Icl = ".icl"
 
 moduleList :: SDSSource FilePath [(ModuleName,ModuleType)] ()
-moduleList = worldShare read write
+moduleList = worldShare read write notify
 where
 	read path world = case scanPaths [path] world of
 		(Ok paths,world) = (Ok (determineModules path paths), world)
 		(Error e,world) = (Error (snd e), world)
 
 	write path () world = (Ok (),world)
+	notify p1 _ p2 = p1 == p2
 
 	scanPaths [] world = (Ok [],world)
 	scanPaths [p:ps] world = case getFileInfo p world of
diff --git a/Libraries/iTasks/Extensions/FileCollection.dcl b/Libraries/iTasks/Extensions/FileCollection.dcl
index 07618f65363cc31aa0c3abfd5c34857392cb2174..964dac59b599c49c5fd7883d8a24fa0be113d1fc 100644
--- a/Libraries/iTasks/Extensions/FileCollection.dcl
+++ b/Libraries/iTasks/Extensions/FileCollection.dcl
@@ -35,3 +35,6 @@ getIntContent :: String FileCollection -> Maybe Int
 setIntContent :: String Int FileCollection -> FileCollection
 
 toPaths :: FileCollection -> [FilePath]
+
+//Filter to ignore all hidden files (e.g. starting with a '.')
+ignoreHiddenFiles :: FileFilter
diff --git a/Libraries/iTasks/Extensions/FileCollection.icl b/Libraries/iTasks/Extensions/FileCollection.icl
index 3943f0761df5d5e07f9a083a674f4f976727c008..463c38f9204550948ed47208ad20f9d4ee2b3b21 100644
--- a/Libraries/iTasks/Extensions/FileCollection.icl
+++ b/Libraries/iTasks/Extensions/FileCollection.icl
@@ -11,7 +11,7 @@ import StdFile
 from Data.Map import :: Map
 import qualified Data.Map as DM
 import Data.Map.GenJSON
-import Data.Error, Data.Functor, Data.Maybe, Text
+import Data.Error, Data.Functor, Data.Func, Data.Maybe, Text
 import System.Directory, System.File, System.FilePath, System.OS
 
 derive class iTask FileCollectionItem
@@ -21,10 +21,11 @@ EXCLUDE_FILE :== "exclude.txt"
 //Writes a map of key/value pairs to a directory with one file per key/value
 //It will ignore all files in the directory that don't match the filter
 fileCollection :: FileFilter Bool -> SDSSource FilePath FileCollection FileCollection
-fileCollection isFileInCollection deleteRemovedFiles = worldShare (read isFileInCollection) (write isFileInCollection)
+fileCollection isFileInCollection deleteRemovedFiles = worldShare (read isFileInCollection) (write isFileInCollection) notify
 where
 	read isFileInCollection dir world = case readDirectory dir world of
-		(Error (_,msg),world) = (Error msg,world) 
+		(Error (2,msg),world) = (Ok 'DM'.newMap,world) //Directory does not exist yet
+		(Error (errNo,msg),world) = (Error msg,world)
 		(Ok files,world) = case (if deleteRemovedFiles (Ok [],world) (readExcludeList dir world)) of 
 			(Error e, world) = (Error e,world)
 			(Ok excludes,world) = case readFiles isFileInCollection excludes dir files world of
@@ -60,10 +61,16 @@ where
 
 	write isFileInCollection dir collection world = case readDirectory dir world of 
 		//We need to know the current content of the directory to be able to delete removed entries
-		(Error (_,msg),world) = (Error msg,world) 
 		(Ok curfiles,world) = case writeFiles ('DM'.toList collection) isFileInCollection dir world of
 			(Error e,world) = (Error e,world)
 			(Ok newfiles,world) = cleanupRemovedFiles curfiles newfiles dir world
+		//The direcrory does not exist yet, create it first and then write the collection
+		(Error (2,_),world) = case ensureDirectory dir world of
+			(Error e,world) = (Error e,world)
+			(Ok (),world) = case writeFiles ('DM'.toList collection) isFileInCollection dir world of
+				(Error e,world) = (Error e,world)
+				(Ok newfiles,world) = cleanupRemovedFiles [] newfiles dir world
+		(Error (_,msg),world) = (Error msg,world)
 		
 	writeFiles [] isFileInCollection dir world = (Ok [],world)
 	writeFiles [(name,FileContent content):fs] isFileInCollection dir world
@@ -111,6 +118,9 @@ where
 			(Ok (),world) = deleteFiles fs dir world
 			(Error (_,msg),world) = (Error msg,world)
 
+	notify writeParameter _ registeredParameter
+		= startsWith writeParameter registeredParameter || startsWith registeredParameter writeParameter
+
 getStringContent :: String FileCollection -> Maybe String
 getStringContent key collection = case 'DM'.get key collection of
 	(Just (FileContent content)) = Just content
@@ -131,3 +141,6 @@ where
 	toPath (name,FileContent _) = [name]
 	toPath (name,FileCollection collection) = [name:[name </> path \\ path <- toPaths collection]]
 
+ignoreHiddenFiles :: FileFilter
+ignoreHiddenFiles = \path isDir -> not (startsWith "." $ dropDirectory path)
+
diff --git a/Libraries/iTasks/SDS/Sources/Core.dcl b/Libraries/iTasks/SDS/Sources/Core.dcl
index a78778eb0d14acdedfce03538276b4bb5731da72..8f5b0dfdec2455491ab921fddfb73c4e22738ffb 100644
--- a/Libraries/iTasks/SDS/Sources/Core.dcl
+++ b/Libraries/iTasks/SDS/Sources/Core.dcl
@@ -24,7 +24,7 @@ randomInt :: SDSSource () Int ()
 randomString :: SDSSource Int String ()
 
 // world function share
-worldShare :: (p *World -> *(MaybeErrorString r,*World)) (p w *World -> *(MaybeErrorString (),*World)) -> SDSSource p r w
+worldShare :: (p *World -> *(MaybeErrorString r,*World)) (p w *World -> *(MaybeErrorString (),*World)) (p Timespec p -> Bool) -> SDSSource p r w
 
 // memory share (essentially a global variable)
 memoryShare :: SDSSource String (Maybe a) (Maybe a) | TC a
diff --git a/Libraries/iTasks/SDS/Sources/Core.icl b/Libraries/iTasks/SDS/Sources/Core.icl
index 2cc5bcd28d303ff3db660ae065c8a781edff2fbc..c03244a917685280e348913a680a8d26266ef080 100644
--- a/Libraries/iTasks/SDS/Sources/Core.icl
+++ b/Libraries/iTasks/SDS/Sources/Core.icl
@@ -22,15 +22,15 @@ nullShare = createReadWriteSDS "_core_" "nullShare" (\_ env -> (Ok (), env)) (\_
 unitShare :: SimpleSDSSource ()
 unitShare = nullShare
 
-worldShare :: (p *World -> *(MaybeErrorString r,*World)) (p w *World -> *(MaybeErrorString (),*World)) -> SDSSource p r w
-worldShare read write = createReadWriteSDS "_core_" "worldShare" read` write`
+worldShare :: (p *World -> *(MaybeErrorString r,*World)) (p w *World -> *(MaybeErrorString (),*World)) (p Timespec p -> Bool) -> SDSSource p r w
+worldShare read write notify = createReadWriteSDS "_core_" "worldShare" read` write`
 where
 	read` p iworld=:{IWorld|world} = case read p world of
 		(Ok r,world) = (Ok r, {IWorld|iworld & world = world})
 		(Error e,world) = (Error (exception e), {IWorld|iworld & world = world})
 
 	write` p w iworld=:{IWorld|world} = case write p w world of
-		(Ok (),world) = (Ok (const (const False)), {IWorld|iworld & world = world})
+		(Ok (),world) = (Ok (notify p), {IWorld|iworld & world = world})
 		(Error e,world) = (Error (exception e), {IWorld|iworld & world = world})
 
 // Random source