oRoot = Application.ActiveSceneRoot
oCube = oRoot.AddGeometry("Cube", "MeshSurface")        
#Creating the first animation source
oSource = Application.StoreAction(oRoot, "cube.kine.local.posx,cube.kine.local.posy,cube.kine.local.posz", 1, "StoredStaticPose", 1, 1, 5, 0, 0)
#Creating the first clip
oClip = Application.AddClip(oRoot, oSource)     
for i in range(oClip.MappedItems.Count):
        oCurrMappedItem = oClip.MappedItems(i)
        oParam = oCurrMappedItem.Destination
        if oParam.FullName == "cube.kine.local.posy":
                Application.SetMappingRule(oClip.FullName + ".ActionClip",oParam,"frame",i+1)
                break
Application.LogMessage("The expression associated with the posy item is " +oCurrMappedItem.ClipEffectItem.Expression)