diff --git a/src/fr/devinsy/xidyn/presenters/Presenter.java b/src/fr/devinsy/xidyn/presenters/Presenter.java
index 37fb5c9..109a514 100644
--- a/src/fr/devinsy/xidyn/presenters/Presenter.java
+++ b/src/fr/devinsy/xidyn/presenters/Presenter.java
@@ -3,7 +3,12 @@ package fr.devinsy.xidyn.presenters;
 import fr.devinsy.xidyn.data.TagDataManager;
 
 /**
- *
+ * This objectives of a presenter are:
+ * <ul>
+ * <li>return the untouched source if there is no tag data (<i>dynamize()</i>)
+ * <li>detect when source is touched
+ * <li>be aware to avoid copy action (performance)
+ * </ul>
  */
 public interface Presenter {