diff --git a/php/src/app/app.php b/php/src/app/app.php
index e7cb4c7..13aa994 100644
--- a/php/src/app/app.php
+++ b/php/src/app/app.php
@@ -9,6 +9,7 @@ use nulib\ExitError;
 use nulib\os\path;
 use nulib\os\sh;
 use nulib\php\func;
+use nulib\ref\ref_profiles;
 use nulib\str;
 use nulib\ValueException;
 
@@ -114,13 +115,21 @@ class app {
   static function get_profile(?bool &$productionMode=null): string {
     return self::get()->getProfile($productionMode);
   }
+
+  static function is_production_mode(): bool {
+    return self::get()->isProductionMode();
+  }
   
   static function is_prod(): bool {
-    return self::get_profile() === "prod";
+    return self::get_profile() === ref_profiles::PROD;
+  }
+
+  static function is_test(): bool {
+    return self::get_profile() === ref_profiles::TEST;
   }
 
   static function is_devel(): bool {
-    return self::get_profile() === "devel";
+    return self::get_profile() === ref_profiles::DEVEL;
   }
 
   static function set_profile(?string $profile=null, ?bool $productionMode=null): void {
diff --git a/php/src/app/cli/Application.php b/php/src/app/cli/Application.php
index 330efdf..02f0901 100644
--- a/php/src/app/cli/Application.php
+++ b/php/src/app/cli/Application.php
@@ -14,6 +14,7 @@ use nulib\output\console;
 use nulib\output\log;
 use nulib\output\msg;
 use nulib\output\std\StdMessenger;
+use nulib\ref\ref_profiles;
 
 /**
  * Class Application: application de base
@@ -257,9 +258,9 @@ EOT);
         "action" => [app::class, "set_profile"],
         "help" => "spécifier le profil d'exécution",
       ],
-      ["-P", "--prod", "action" => [app::class, "set_profile", "prod"]],
-      ["-T", "--test", "action" => [app::class, "set_profile", "test"]],
-      ["--devel", "action" => [app::class, "set_profile", "devel"]],
+      ["-P", "--prod", "action" => [app::class, "set_profile", ref_profiles::PROD]],
+      ["-T", "--test", "action" => [app::class, "set_profile", ref_profiles::TEST]],
+      ["--devel", "action" => [app::class, "set_profile", ref_profiles::DEVEL]],
     ],
   ];
 
@@ -307,9 +308,9 @@ EOT);
   }
 
   const PROFILE_COLORS = [
-    "prod" => "@r",
-    "test" => "@g",
-    "devel" => "@w",
+    ref_profiles::PROD => "@r",
+    ref_profiles::TEST => "@g",
+    ref_profiles::DEVEL => "@w",
   ];
   const DEFAULT_PROFILE_COLOR = "y";
 
diff --git a/php/src/app/config/ProfileManager.php b/php/src/app/config/ProfileManager.php
index 6645906..9e66c5b 100644
--- a/php/src/app/config/ProfileManager.php
+++ b/php/src/app/config/ProfileManager.php
@@ -3,6 +3,7 @@ namespace nulib\app\config;
 
 use nulib\app\app;
 use nulib\app\config;
+use nulib\ref\ref_profiles;
 
 /**
  * Class ProfileManager: gestionnaire de profils
@@ -21,10 +22,7 @@ class ProfileManager {
   const PROFILES = null;
 
   /** @var array profils dont le mode production doit être actif */
-  const PRODUCTION_MODES = [
-    "prod" => true,
-    "test" => true,
-  ];
+  const PRODUCTION_MODES = ref_profiles::PRODUCTION_MODES;
 
   /**
    * @var array mapping profil d'application --> profil effectif
@@ -114,7 +112,7 @@ class ProfileManager {
     $profile ??= $this->getConfigProfile();
     $profile ??= $this->getDefaultProfile();
     if ($this->isAppProfile) {
-      $profile ??= $this->profiles[0] ?? "prod";
+      $profile ??= $this->profiles[0] ?? ref_profiles::PROD;
     } else {
       $profile ??= $this->mapProfile(app::get_profile());
     }
diff --git a/php/src/file/Stream.php b/php/src/file/Stream.php
index c1d7496..89b3c7c 100644
--- a/php/src/file/Stream.php
+++ b/php/src/file/Stream.php
@@ -6,7 +6,7 @@ use nulib\NoMoreDataException;
 use nulib\os\EOFException;
 use nulib\os\IOException;
 use nulib\php\iter\AbstractIterator;
-use nulib\ref\file\csv\ref_csv;
+use nulib\ref\ref_csv;
 use nulib\str;
 use nulib\ValueException;
 
diff --git a/php/src/file/csv/csv_flavours.php b/php/src/file/csv/csv_flavours.php
index 4bc7bd9..2a782e6 100644
--- a/php/src/file/csv/csv_flavours.php
+++ b/php/src/file/csv/csv_flavours.php
@@ -2,7 +2,7 @@
 namespace nulib\file\csv;
 
 use nulib\cl;
-use nulib\ref\file\csv\ref_csv;
+use nulib\ref\ref_csv;
 use nulib\str;
 
 class csv_flavours {
diff --git a/php/src/ref/ref_cache.php b/php/src/ref/ref_cache.php
new file mode 100644
index 0000000..d1dbf0a
--- /dev/null
+++ b/php/src/ref/ref_cache.php
@@ -0,0 +1,11 @@
+<?php
+namespace nulib\ref;
+
+/**
+ * Class ref_cache: référence des durées de mise en cache
+ */
+class ref_cache {
+  const MINUTE = 60;
+  const HOUR = 60 * self::MINUTE;
+  const DAY = 24 * self::HOUR;
+}
diff --git a/php/src/ref/file/csv/ref_csv.php b/php/src/ref/ref_csv.php
similarity index 96%
rename from php/src/ref/file/csv/ref_csv.php
rename to php/src/ref/ref_csv.php
index 22fcb9c..52a3b26 100644
--- a/php/src/ref/file/csv/ref_csv.php
+++ b/php/src/ref/ref_csv.php
@@ -1,5 +1,5 @@
 <?php
-namespace nulib\ref\file\csv;
+namespace nulib\ref;
 
 /**
  * Class ref_csv: références des valeurs normalisées pour les fichiers CSV à
diff --git a/php/src/ref/php/ref_func.php b/php/src/ref/ref_func.php
similarity index 96%
rename from php/src/ref/php/ref_func.php
rename to php/src/ref/ref_func.php
index 451c81b..ac75886 100644
--- a/php/src/ref/php/ref_func.php
+++ b/php/src/ref/ref_func.php
@@ -1,5 +1,5 @@
 <?php
-namespace nulib\ref\php;
+namespace nulib\ref;
 
 class ref_func {
   const CALL_ALL_PARAMS_SCHEMA = [
diff --git a/php/src/ref/ref_jquery.php b/php/src/ref/ref_jquery.php
new file mode 100644
index 0000000..186ec65
--- /dev/null
+++ b/php/src/ref/ref_jquery.php
@@ -0,0 +1,15 @@
+<?php
+namespace nulib\ref;
+
+class ref_jquery {
+  const HAVE_JQUERY = true;
+
+  function printJquery(): void {
+    ?>
+<script type="text/javascript">
+jQuery.noConflict()(function($) {
+});
+</script>
+<?php
+  }
+}
diff --git a/php/src/ref/web/ref_mimetypes.php b/php/src/ref/ref_mimetypes.php
similarity index 92%
rename from php/src/ref/web/ref_mimetypes.php
rename to php/src/ref/ref_mimetypes.php
index d896c13..61091f0 100644
--- a/php/src/ref/web/ref_mimetypes.php
+++ b/php/src/ref/ref_mimetypes.php
@@ -1,5 +1,5 @@
 <?php
-namespace nulib\ref\web;
+namespace nulib\ref;
 
 class ref_mimetypes {
   const TXT = "text/plain";
diff --git a/php/src/ref/ref_profiles.php b/php/src/ref/ref_profiles.php
new file mode 100644
index 0000000..bcdc3de
--- /dev/null
+++ b/php/src/ref/ref_profiles.php
@@ -0,0 +1,22 @@
+<?php
+namespace nulib\ref;
+
+/**
+ * Class ref_profiles: noms de profils normalisés
+ */
+class ref_profiles {
+  const PROD = "prod";
+  const TEST = "test";
+  const DEVEL = "devel";
+
+  const PROFILES = [
+    self::PROD,
+    self::TEST,
+    self::DEVEL,
+  ];
+
+  const PRODUCTION_MODES = [
+    self::PROD => true,
+    self::TEST => true,
+  ];
+}