Add controlled list of conservation status

src/MDConservationStatusSet.php

@@ -0,0 +1,21 @@
+<?PHP
+/**
+ * Contains a class for controlling the list of available recording types and sources.
+ *
+ * @author Joshua Ramon Enslin <joshua@museum-digital.de>
+ */
+declare(strict_types = 1);
+
+/**
+ * Class containing available units for weights, lengths etc.
+ */
+final class MDConservationStatusSet extends MDValueSet {
+
+    const STATUS_LEVELS = [
+        1 => '',
+        34 => 'markedBad',
+        67 => 'markedMedium',
+        100 => 'markedGood'
+    ];
+
+}