diff --git a/form.php b/form.php
index 06bfb9a..b07bd35 100644
--- a/form.php
+++ b/form.php
@@ -59,6 +59,8 @@ class form
                      to check the defaults per example
       - [mandatory] : boolean to add a red star at end of label
       - [hidden]    : hide the field (add a style='display:hidden' to the field)
+      - [prefix]    : the prefix added to the name (in XXX/YYY/ZZZ form).
+                      Will form an array to the result
 
       @param array $fields The fields to be displayed
       */
@@ -171,7 +173,6 @@ die ("FORM/VERIFY : UNUSED and dirty\n");
   public function printHTML ($method = 'post', $values = NULL,
                              $errors = array())
   {
-    // TODO : textarea, file
     $this->method = strtolower ($method);
     $res = "";
     $res = "<form action='#' method='$method'";
@@ -205,8 +206,10 @@ die ("FORM/VERIFY : UNUSED and dirty\n");
           $res .= " has-".$errors[$field->name][0];
         $res .= "'>\n";
         $res .= "    <label class='col-sm-2 control-label' for='".
-                $this->formName."_".
-                htmlspecialchars ($field->name, ENT_QUOTES)."_0'";
+                $this->formName."_";
+        if (isset ($field->prefix))
+          $res .= preg_replace ("#[/ ]#", "_", $field->prefix)."_";
+        $res .= htmlspecialchars ($field->name, ENT_QUOTES)."_0'";
         if (isset ($field->hidden) && $field->hidden !== FALSE)
           $res .= " style='display:none'";
         $res .= ">";
@@ -222,15 +225,21 @@ die ("FORM/VERIFY : UNUSED and dirty\n");
         foreach ($field->titles as $key=>$val)
         {
           $res .= "      <input type='hidden'";
-          $res .= " name='$this->formName"."[".
-                  htmlspecialchars ($field->name, ENT_QUOTES)."][$key]'";
+          $res .= " name='$this->formName"."[";
+          if (isset ($field->prefix))
+            $res .= implode ("][", explode ("/", $field->prefix))."][";
+          $res .= htmlspecialchars ($field->name, ENT_QUOTES)."][$key]'";
           $res .= " value='unset'";
           $res .= "/>";
           $res .= "<input type='checkbox'";
-          $res .= " name='$this->formName"."[".
-                  htmlspecialchars ($field->name, ENT_QUOTES)."][$key]'";
-          $res .= " id='$this->formName"."_".
-                  htmlspecialchars ($field->name, ENT_QUOTES)."_$key'";
+          $res .= " name='$this->formName"."[";
+          if (isset ($field->prefix))
+            $res .= implode ("][", explode ("/", $field->prefix))."][";
+          $res .= htmlspecialchars ($field->name, ENT_QUOTES)."][$key]'";
+          $res .= " id='$this->formName"."_";
+          if (isset ($field->prefix))
+            $res .= preg_replace ("#[/ ]#", "_", $field->prefix)."_";
+          $res .= htmlspecialchars ($field->name, ENT_QUOTES)."_$key'";
           if (isset ($field->readonly) && $field->readonly !== FALSE)
             $res .= " disabled='disabled'";
           if (isset ($values[$field->name][$key]) &&
@@ -256,10 +265,14 @@ die ("FORM/VERIFY : UNUSED and dirty\n");
       case "hidden":
         // No $field->label, $field->multiple, $field->readonly, $field->hidden
         $res .= "<input type='hidden'";
-        $res .= " name='$this->formName"."[".
-                htmlspecialchars ($field->name, ENT_QUOTES)."]'";
-        $res .= " id='$this->formName"."_".
-                htmlspecialchars ($field->name, ENT_QUOTES)."'";
+        $res .= " name='$this->formName"."[";
+        if (isset ($field->prefix))
+          $res .= implode ("][", explode ("/", $field->prefix))."][";
+        $res .= htmlspecialchars ($field->name, ENT_QUOTES)."]'";
+        $res .= " id='$this->formName"."_";
+        if (isset ($field->prefix))
+          $res .= preg_replace ("#[/ ]#", "_", $field->prefix)."_";
+        $res .= htmlspecialchars ($field->name, ENT_QUOTES)."'";
         if (isset ($values[$field->name]))
           $res .= " value='".htmlspecialchars ($values[$field->name])."'";
         else
@@ -274,8 +287,10 @@ die ("FORM/VERIFY : UNUSED and dirty\n");
           $res .= " has-".$errors[$field->name][0];
         $res .= "'>\n";
         $res .= "    <label class='col-sm-2 control-label' for='".
-                $this->formName."_".
-                htmlspecialchars ($field->name, ENT_QUOTES)."'";
+                $this->formName."_";
+        if (isset ($field->prefix))
+          $res .= preg_replace ("#[/ ]#", "_", $field->prefix)."_";
+        $res .= htmlspecialchars ($field->name, ENT_QUOTES)."'";
         if (isset ($field->hidden) && $field->hidden !== FALSE)
           $res .= " style='display:none'";
         $res .= ">";
@@ -287,10 +302,14 @@ die ("FORM/VERIFY : UNUSED and dirty\n");
         $res .= "</label>\n";
         $res .= "    <div class='col-sm-10'>\n";
         $res .= "      <input type='password'";
-        $res .= " name='$this->formName"."[".
-                htmlspecialchars ($field->name, ENT_QUOTES)."]'";
-        $res .= " id='$this->formName"."_".
-                htmlspecialchars ($field->name, ENT_QUOTES)."'";
+        $res .= " name='$this->formName"."[";
+        if (isset ($field->prefix))
+          $res .= implode ("][", explode ("/", $field->prefix))."][";
+        $res .= htmlspecialchars ($field->name, ENT_QUOTES)."]'";
+        $res .= " id='$this->formName"."_";
+        if (isset ($field->prefix))
+          $res .= preg_replace ("#[/ ]#", "_", $field->prefix)."_";
+        $res .= htmlspecialchars ($field->name, ENT_QUOTES)."'";
         if (isset ($values[$field->name]))
           $res .= " value='".htmlspecialchars ($values[$field->name],
                                                ENT_QUOTES)."'";
@@ -317,8 +336,10 @@ die ("FORM/VERIFY : UNUSED and dirty\n");
           $res .= " has-".$errors[$field->name][0];
         $res .= "'>\n";
         $res .= "    <label class='col-sm-2 control-label' for='".
-                $this->formName."_".
-                htmlspecialchars ($field->name, ENT_QUOTES)."_0'";
+                $this->formName."_";
+        if (isset ($field->prefix))
+          $res .= preg_replace ("#[/ ]#", "_", $field->prefix)."_";
+        $res .= htmlspecialchars ($field->name, ENT_QUOTES)."_0'";
         if (isset ($field->hidden) && $field->hidden !== FALSE)
           $res .= " style='display:none'";
         $res .= ">";
@@ -332,18 +353,24 @@ die ("FORM/VERIFY : UNUSED and dirty\n");
         if (is_string ($field->defaults))
           $field->defaults = array ($field->defaults);
         $res .= "      <input type='hidden'";
-        $res .= " name='$this->formName"."[".
-                htmlspecialchars ($field->name, ENT_QUOTES)."]'";
+        $res .= " name='$this->formName"."[";
+        if (isset ($field->prefix))
+          $res .= implode ("][", explode ("/", $field->prefix))."][";
+        $res .= htmlspecialchars ($field->name, ENT_QUOTES)."]'";
         $res .= " value='unset'";
         $res .= "/>\n";
         foreach ($field->titles as $key=>$val)
         {
           $res .= "      <label class='radio'>";
           $res .= "<input type='radio'";
-          $res .= " name='$this->formName"."[".
-                  htmlspecialchars ($field->name, ENT_QUOTES)."]'";
-          $res .= " id='$this->formName"."_".
-                  htmlspecialchars ($field->name, ENT_QUOTES)."_$key'";
+          $res .= " name='$this->formName"."[";
+          if (isset ($field->prefix))
+            $res .= implode ("][", explode ("/", $field->prefix))."][";
+          $res .= htmlspecialchars ($field->name, ENT_QUOTES)."]'";
+          $res .= " id='$this->formName"."_";
+          if (isset ($field->prefix))
+            $res .= preg_replace ("#[/ ]#", "_", $field->prefix)."_";
+          $res .= htmlspecialchars ($field->name, ENT_QUOTES)."_$key'";
           $res .= " value='".htmlspecialchars ($val, ENT_QUOTES)."'";
           if (isset ($field->readonly) && $field->readonly !== FALSE)
             $res .= " readonly='readonly'";
@@ -375,8 +402,10 @@ die ("FORM/VERIFY : UNUSED and dirty\n");
           $res .= " has-".$errors[$field->name][0];
         $res .= "'>\n";
         $res .= "    <label class='col-sm-2 control-label' for='".
-                $this->formName."_".
-                htmlspecialchars ($field->name, ENT_QUOTES)."'";
+                $this->formName."_";
+        if (isset ($field->prefix))
+          $res .= preg_replace ("#[/ ]#", "_", $field->prefix)."_";
+        $res .= htmlspecialchars ($field->name, ENT_QUOTES)."'";
         if (isset ($field->hidden) && $field->hidden !== FALSE)
           $res .= " style='display:none'";
         $res .= ">";
@@ -395,12 +424,20 @@ die ("FORM/VERIFY : UNUSED and dirty\n");
             {
               $res .= "      <input type='hidden'";
               if (isset ($field->multiple) && $field->multiple !== FALSE)
-                $res .= " name='$this->formName"."[".
-                        htmlspecialchars ($field->name, ENT_QUOTES)."][".
+              {
+                $res .= " name='$this->formName"."[";
+                if (isset ($field->prefix))
+                  $res .= implode ("][", explode ("/", $field->prefix))."][";
+                $res .= htmlspecialchars ($field->name, ENT_QUOTES)."][".
                         htmlspecialchars ($key, ENT_QUOTES)."]'";
+              }
               else
-                $res .= " name='$this->formName"."[".
-                        htmlspecialchars ($field->name, ENT_QUOTES)."]'";
+              {
+                $res .= " name='$this->formName"."[";
+                if (isset ($field->prefix))
+                  $res .= implode ("][", explode ("/", $field->prefix))."][";
+                $res .= htmlspecialchars ($field->name, ENT_QUOTES)."]'";
+              }
               $res .= " value='";
               $res .= htmlspecialchars ($key, ENT_QUOTES)."'";
               $res .= "/>\n";
@@ -408,13 +445,17 @@ die ("FORM/VERIFY : UNUSED and dirty\n");
           }
 
           $res .= "      <select";
-          $res .= " name='$this->formName"."[".
-                  htmlspecialchars ($field->name, ENT_QUOTES)."]";
+          $res .= " name='$this->formName"."[";
+          if (isset ($field->prefix))
+            $res .= implode ("][", explode ("/", $field->prefix))."][";
+          $res .= htmlspecialchars ($field->name, ENT_QUOTES)."]";
           if (isset ($field->multiple) && $field->multiple !== FALSE)
             $res .= "[]";
           $res .= "'";
-          $res .= " id='$this->formName"."_".
-                  htmlspecialchars ($field->name, ENT_QUOTES)."'";
+          $res .= " id='$this->formName"."_";
+          if (isset ($field->prefix))
+            $res .= preg_replace ("#[/ ]#", "_", $field->prefix)."_";
+          $res .= htmlspecialchars ($field->name, ENT_QUOTES)."'";
           if (isset ($field->multiple) && $field->multiple !== FALSE)
             $res .= " multiple='multiple'";
           if (isset ($field->readonly) && $field->readonly !== FALSE)
@@ -459,10 +500,14 @@ die ("FORM/VERIFY : UNUSED and dirty\n");
         $res .= "<div class='form-group'>\n";
         $res .= "    <div class='col-sm-12'>\n";
         $res .= "      <input type='submit'";
-        $res .= " name='$this->formName"."[".
-                htmlspecialchars ($field->name, ENT_QUOTES)."]'";
-        $res .= " id='$this->formName"."_".
-                htmlspecialchars ($field->name, ENT_QUOTES)."'";
+        $res .= " name='$this->formName"."[";
+        if (isset ($field->prefix))
+          $res .= implode ("][", explode ("/", $field->prefix))."][";
+        $res .= htmlspecialchars ($field->name, ENT_QUOTES)."]'";
+        $res .= " id='$this->formName"."_";
+        if (isset ($field->prefix))
+          $res .= preg_replace ("#[/ ]#", "_", $field->prefix)."_";
+        $res .= htmlspecialchars ($field->name, ENT_QUOTES)."'";
         if (isset ($field->readonly) && $field->readonly !== FALSE)
           $res .= " disabled='disabled'";
         if (isset ($field->defaults))
@@ -485,8 +530,10 @@ die ("FORM/VERIFY : UNUSED and dirty\n");
           $res .= " has-".$errors[$field->name][0];
         $res .= "'>\n";
         $res .= "    <label class='col-sm-2 control-label' for='".
-                $this->formName."_".
-                htmlspecialchars ($field->name, ENT_QUOTES)."'";
+                $this->formName."_";
+        if (isset ($field->prefix))
+          $res .= preg_replace ("#[/ ]#", "_", $field->prefix)."_";
+        $res .= htmlspecialchars ($field->name, ENT_QUOTES)."'";
         if (isset ($field->hidden) && $field->hidden !== FALSE)
           $res .= " style='display:none'";
         $res .= ">";
@@ -498,10 +545,14 @@ die ("FORM/VERIFY : UNUSED and dirty\n");
         $res .= "</label>\n";
         $res .= "    <div class='col-sm-10'>\n";
         $res .= "      <textarea";
-        $res .= " name='$this->formName"."[".
-                htmlspecialchars ($field->name, ENT_QUOTES)."]'";
-        $res .= " id='$this->formName"."_".
-                htmlspecialchars ($field->name, ENT_QUOTES)."'";
+        $res .= " name='$this->formName"."[";
+        if (isset ($field->prefix))
+          $res .= implode ("][", explode ("/", $field->prefix))."][";
+        $res .= htmlspecialchars ($field->name, ENT_QUOTES)."]'";
+        $res .= " id='$this->formName"."_";
+        if (isset ($field->prefix))
+          $res .= preg_replace ("#[/ ]#", "_", $field->prefix)."_";
+        $res .= htmlspecialchars ($field->name, ENT_QUOTES)."'";
         if (isset ($field->readonly) && $field->readonly !== FALSE)
           $res .= " readonly='readonly'";
         $res .= " class='form-control'";
@@ -527,8 +578,10 @@ die ("FORM/VERIFY : UNUSED and dirty\n");
           $res .= " has-".$errors[$field->name][0];
         $res .= "'>\n";
         $res .= "    <label class='col-sm-2 control-label' for='".
-                $this->formName."_".
-                htmlspecialchars ($field->name, ENT_QUOTES)."'";
+                $this->formName."_";
+        if (isset ($field->prefix))
+          $res .= preg_replace ("#[/ ]#", "_", $field->prefix)."_";
+        $res .= htmlspecialchars ($field->name, ENT_QUOTES)."'";
         if (isset ($field->hidden) && $field->hidden !== FALSE)
           $res .= " style='display:none'";
         $res .= ">";
@@ -540,10 +593,14 @@ die ("FORM/VERIFY : UNUSED and dirty\n");
         $res .= "</label>\n";
         $res .= "    <div class='col-sm-10'>\n";
         $res .= "      <input type='text'";
-        $res .= " name='$this->formName"."[".
-                htmlspecialchars ($field->name, ENT_QUOTES)."]'";
-        $res .= " id='$this->formName"."_".
-                htmlspecialchars ($field->name, ENT_QUOTES)."'";
+        $res .= " name='$this->formName"."[";
+        if (isset ($field->prefix))
+          $res .= implode ("][", explode ("/", $field->prefix))."][";
+        $res .= htmlspecialchars ($field->name, ENT_QUOTES)."]'";
+        $res .= " id='$this->formName"."_";
+        if (isset ($field->prefix))
+          $res .= preg_replace ("#[/ ]#", "_", $field->prefix)."_";
+        $res .= htmlspecialchars ($field->name, ENT_QUOTES)."'";
         if (isset ($values[$field->name]))
           $res .= " value='".htmlspecialchars ($values[$field->name],
                                                ENT_QUOTES)."'";