diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -16,3 +16,7 @@
 
 * Second version. Added new functions diverse1, diverse1s, diverse2 to the module. Changed the dependency boundaries for uniqueness-periods-vector. Some minor 
 documentation improvements.
+
+## 0.3.0.0 -- 2020-09-09
+
+* Third version. Added new functions oneProperty and justOneValue2Property to the module. Some minor code improvements.
diff --git a/Languages/UniquenessPeriods/Vector/Properties.hs b/Languages/UniquenessPeriods/Vector/Properties.hs
--- a/Languages/UniquenessPeriods/Vector/Properties.hs
+++ b/Languages/UniquenessPeriods/Vector/Properties.hs
@@ -98,3 +98,18 @@
 diverse2 v 
   | V.null v = 0
   | otherwise = V.sum . V.map (sum . fst) $ v
+{-# INLINE diverse2 #-} 
+
+-- | Is intended to be used in the 'V.Vector' @([b] -> b)@ where just the first value in the list is used. The simplest case among all possible ones. For an empty 
+-- list returns 'error' with an informative message. 
+oneProperty :: Ord b => [b] -> b
+oneProperty xs 
+ | null xs = error "Languages.UniquenessPeriods.Vector.Properties.oneProperty: empty list. "
+ | otherwise = head xs
+{-# INLINE oneProperty #-} 
+
+-- | Converts just one value to the needed list to be used as a \"property\". Is provided here for explanation purposes (just as a meaningful alias). Therefore, it is
+-- an auxiliary function. 
+justOneValue2Property :: Ord b => b -> [b]
+justOneValue2Property = (:[])
+{-# INLINE justOneValue2Property #-} 
diff --git a/uniqueness-periods-vector-properties.cabal b/uniqueness-periods-vector-properties.cabal
--- a/uniqueness-periods-vector-properties.cabal
+++ b/uniqueness-periods-vector-properties.cabal
@@ -3,9 +3,9 @@
 -- http://haskell.org/cabal/users-guide/
 
 name:                uniqueness-periods-vector-properties
-version:             0.2.0.0
-synopsis:            Metrics for the maximum element for the uniqueness-periods-vector packages family.
-description:         Metrics for the maximum element for the uniqueness-periods-vector packages family. Generalization of the DobutokO.Poetry.Norms and DobutokO.Poetry.Norms.Extended modules from dobuotokO-poetry package.
+version:             0.3.0.0
+synopsis:            Metrices for the maximum element for the uniqueness-periods-vector packages family.
+description:         Metrices for the maximum element for the uniqueness-periods-vector packages family. Generalization of the DobutokO.Poetry.Norms and DobutokO.Poetry.Norms.Extended modules from dobuotokO-poetry package.
 homepage:            https://hackage.haskell.org/package/uniqueness-periods-vector-properties
 license:             MIT
 license-file:        LICENSE