diff --git a/src/Identifier.php b/src/Identifier.php
new file mode 100644
index 0000000..914ec84
--- /dev/null
+++ b/src/Identifier.php
@@ -0,0 +1,42 @@
+<?php
+
+namespace RomhackPlaza;
+defined( 'ABSPATH' ) || exit;
+
+class Identifier {
+
+    const string CPT_TRANSLATIONS = "translations";
+    const string CPT_ROMHACKS = "romhacks";
+    const string CPT_HOMEBREWS = "homebrew";
+    const string CPT_UTILITIES = "utilities";
+    const string CPT_DOCUMENTS = "documents";
+    const string CPT_LUA_SCRIPTS = "lua-scripts";
+    const string CPT_TUTORIALS = "tutorials";
+    const string CPT_NEWS = "news";
+    const string CPT_REVIEWS = "reviews";
+
+    // ...
+
+    const string TAX_GAME = "game";
+    const string TAX_STATUS = "hack-status";
+    const string TAX_LANG = "language";
+    const string TAX_PLATFORM = "platform";
+    const string TAX_AUTHORS = "author-name";
+    const string TAX_UTILITY_CATEGORY = "utility-category";
+    const string TAX_LEVEL = "experience-level";
+    const string TAX_OS = "utility-os";
+    const string TAX_DOCUMENT_CATEGORY = "document-category";
+    const string TAX_MODIFICATIONS = "modifications";
+    const string TAX_HOMEBREW_TYPE = "homebrew-type";
+    const string TAX_NEWS_CATEGORY = "news-category";
+    const string TAX_GENRE = "genre";
+    const string TAX_TUTORIAL_CATEGORY = "tutorial-category";
+    const string TAX_LUA_MODIFICATIONS = "lua-modifications";
+
+    // ...
+
+    const string GALLERY = "my_gallery";
+
+    private function __construct() {}
+
+}