diff --git a/src/main/scala/util/Validations.scala b/src/main/scala/util/Validations.scala
index 6204f2c..d5db5c9 100644
--- a/src/main/scala/util/Validations.scala
+++ b/src/main/scala/util/Validations.scala
@@ -122,9 +122,12 @@
       } else None
   }
   
+  // TODO make basic Constraints for Int, Long, Boolean and Option
+  
   /////////////////////////////////////////////////////////////////////////////////////////////
   // ValueType wrappers to provide additional features.
   
+  // TODO make an other trim implementation for MappingValueType which is trim all parameters.
   def trim[T](valueType: SingleValueType[T]): SingleValueType[T] = new SingleValueType[T](){
     def convert(value: String): T = valueType.convert(value.trim)
     override def validate(name: String, value: String): Seq[(String, String)] = valueType.validate(name, value.trim)