First draft

src/Enum/OaiVerbs.php

@@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Enum;
+
+enum OaiVerbs: string
+{
+    case Identify = 'Identify';
+    case ListRecords = 'ListRecords';
+    case ListIdentifiers = 'ListIdentifiers';
+    case ListSets = 'ListSets';
+    case ListMetadataFormats = 'ListMetadataFormats';
+    case GetRecord = 'GetRecord';
+}