Add concordance lists (moved from MDImporter)

src/MDConcLengths.php

@@ -0,0 +1,18 @@
+<?PHP
+/**
+ * Constains lists for categorizing misspelled sizes.
+ *
+ * @author Joshua Ramon Enslin <joshua@museum-digital.de>
+ */
+declare(strict_types = 1);
+
+/**
+ * Provides lists for categorizing misspelled sizes.
+ */
+final class MDConcLengths {
+
+    const LENGTHS_LIST = [
+        "cn" => "cm",
+    ];
+
+}