diff --git a/task.rb b/task.rb
index 5227f8a..e18aa01 100644
--- a/task.rb
+++ b/task.rb
@@ -23,7 +23,7 @@ class Task
         # tags
         @tags=tags
     end
-    def initialize(description)
+    def initialize(raw_input)
         @notes=[]
         @contacts=[]
         @contexts=[]
@@ -31,14 +31,16 @@ class Task
         @tags=[]
         @priority=0
         @dates=TaskTime.new()
+        from_s(raw_input)
     end
     def to_s
-        return @description + 
-            @contexts.map { |x| x.to_s }.join(" ") + 
-            @projects.map { |x| '['+x.to_s+']' }.join(" ") +
-            @contacts.map { |x| x.to_s }.join(" ") +
-            @dates.to_s +
-            '{' + @tags.map{ |x| x.to_s }.join(", ") + '}'
+        res=@description
+        if (@contexts): res+=' ' + @contexts.map { |x| x.to_s }.join(" ") end
+        if (@projects): res+=' ' + @projects.map { |x| '['+x.to_s+']' }.join(" ") end
+        if (@contacts): res+=' ' + @contacts.map { |x| x.to_s }.join(" ") end
+        if (@dates):    res+=' ' + @dates.to_s end
+        if (@tags):     res+=' ' + '{' + @tags.map{ |x| x.to_s }.join(", ") + '}' end
+        return res
     end
 
     # -- constant class variable for each part 
@@ -57,20 +59,22 @@ class Task
 
     def from_s( raw_input )
 
-        @contexts=raw.scan(@@ContextsRegExp).map{ |x| x[0] }
-        @projects=raw.scan(@@ProjectsRegExp).map{ |x| x[0] }
-        @contacts=raw.scan(@@ContactsRegExp).map{ |x| x[1] }
-        @notes   =raw.scan(   @@NotesRegExp).map{ |x| x[0] }
-        # @contexts=raw.scan(/ @(\w+|"[^"]*")/).map{ |x| x[0] }
-        # @projects=raw.scan(/\[(\w+|"[^"]*")\]/).map{ |x| x[0] }
-        # @contacts=raw.scan(/ (c|contact):(\w+|"[^"]*")/).map{ |x| x[1] }
-        # @notes=raw.scan(/\[(\w+|"[^"]*")\]/).map{ |x| x[1] }
+        @contexts=raw_input.scan(@@ContextsRegExp).map{ |x| x[0] }
+        @projects=raw_input.scan(@@ProjectsRegExp).map{ |x| x[0] }
+        @contacts=raw_input.scan(@@ContactsRegExp).map{ |x| x[1] }
+        @notes   =raw_input.scan(   @@NotesRegExp).map{ |x| x[0] }
 
         # somehow special for the priority
-        @priority= raw.scan( /!/ ).length - raw.scan( /\?/ ).length
+        @priority= raw_input.scan( /!/ ).length - raw_input.scan( /\?/ ).length
 
         @description=raw_input.gsub(
-            Regexp.union(@@ContextsRegExp, @@ProjectsRegExp, @@ContactsRegExp, @@NotesRegExp, /!/, /\?/, @date.dateRegexp),"")
-        @dates   =TaskTime.from_s(raw_input)
+            Regexp.union(@@ContextsRegExp, @@ProjectsRegExp, 
+                         @@ContactsRegExp, @@NotesRegExp, 
+                         /!/, /\?/, @dates.regexp),"")
+        @dates=TaskTime.new(raw_input)
     end
 end
+
+current = Task.new("Coucou");
+print current.to_s
+print "\n"
diff --git a/taskTime.rb b/taskTime.rb
index 2f1fe03..87da90c 100644
--- a/taskTime.rb
+++ b/taskTime.rb
@@ -1,19 +1,59 @@
 #!/usr/bin/env ruby
 
+# -- pour la lecture de la date à partir du language naturel
+require 'rubygems'
+require 'chronic'
+
 class TaskTime
     @creation_date  # creation date of the task
-    @done_date      # date at which the task was done
     @start_date     # date at with the task began (hour,minute,second)
+    @done_date      # date at which the task was done
     @due_date       # due date for the task
     @duration       # time spend for finish that task
                     # can be set by the user to be
                     # different than (@done_date - @start_date)
     @max_duration   # maximal duration for that task
     @min_duration   # minimal duration for that task
-    def initialize()
-        @creation_date=Time.now
+
+    # -- Expressions regulières --
+    # Regular Expressions for that class
+    @@StdTokenRegExp=/(\w+|"[^"]*")/
+    # Notes
+    @@Time=Regexp.new(%{#(#{@@StdTokenRegExp.inspect}(,|->))?#{@@StdTokenRegExp.inspect}})
+
+    def to_s
+        res=%{created:#{@creation_date}}
+        if ( @start_date )  : res+=%{,started:#{@start_date}}       end
+        if ( @done_date )   : res+=%{,done:#{@done_date}}           end
+        if ( @due_date )    : res+=%{,due:#{@due_date}}             end
+        if ( @duration )    : res+=%{,duration:#{@duration}}        end
+        if ( @max_duration ): res+=%{,max_duration:#{@duration}}    end
+        if ( @min_duration ): res+=%{,min_duration:#{@duration}}    end
+        return res
     end
-    def taskTimeRegExp
-        return Regexp.new(" #[^ ]*")
+
+    def from_s( raw_input )
+        scanned_input=raw_input.scan( @@Time )
+        str_of_start_date = scanned_input.map{ |x| x[4] }
+        @start_date       = Chronic.parse(str_of_start_date)
+        str_of_due_date   = scanned_input.map{ |x| x[1] }
+        @due_date         = Chronic.parse(str_of_due_date)
+    end
+
+    def initialize ( raw_input=nil )
+        @creation_date=Time.now
+        @start_date   = nil
+        @done_date    = nil
+        @due_date     = nil
+        @duration     = nil
+        @max_duration = nil 
+        @min_duration = nil 
+        if raw_input:
+            from_s raw_input
+        end
+    end
+
+    def regexp
+        return @@Time
     end
 end