diff --git a/src/MDConcColors.php b/src/MDConcColors.php
new file mode 100644
index 0000000..9af5555
--- /dev/null
+++ b/src/MDConcColors.php
@@ -0,0 +1,35 @@
+<?PHP
+/**
+ * Constains lists for grouping colors.
+ *
+ * @author Joshua Ramon Enslin <joshua@museum-digital.de>
+ */
+declare(strict_types = 1);
+
+/**
+ * Constains lists for grouping colors.
+ */
+final class MDConcColors implements MDImporterConcordanceListInterface {
+
+    private const COLORS_LIST = [
+        'Gelb' => 'yellow',
+        'Schwarz' => 'black',
+    ];
+
+    /**
+     * Require a function for getting the concordance target.
+     *
+     * @param string $input Input string.
+     *
+     * @return string
+     */
+    public static function getConcordanceTarget(string $input):string {
+
+        if (!isset(self::COLORS_LIST[$input])) {
+            throw new MDImporterMissingConcordance("Unknown color: " . $input);
+        }
+
+        return self::COLORS_LIST[$input];
+
+    }
+}
diff --git a/src/MDConcObjectForms.php b/src/MDConcObjectForms.php
new file mode 100644
index 0000000..53181d5
--- /dev/null
+++ b/src/MDConcObjectForms.php
@@ -0,0 +1,35 @@
+<?PHP
+/**
+ * Constains lists for grouping object forms / shapes.
+ *
+ * @author Joshua Ramon Enslin <joshua@museum-digital.de>
+ */
+declare(strict_types = 1);
+
+/**
+ * Constains lists for grouping object forms / shapes.
+ */
+final class MDConcObjectForms implements MDImporterConcordanceListInterface {
+
+    private const FORMS_LIST = [
+        'Würfel' => 'cube',
+        'Zylinder' => 'cylinder',
+    ];
+
+    /**
+     * Require a function for getting the concordance target.
+     *
+     * @param string $input Input string.
+     *
+     * @return string
+     */
+    public static function getConcordanceTarget(string $input):string {
+
+        if (!isset(self::FORMS_LIST[$input])) {
+            throw new MDImporterMissingConcordance("Unknown form type: " . $input);
+        }
+
+        return self::FORMS_LIST[$input];
+
+    }
+}
diff --git a/src/MDConcSex.php b/src/MDConcSex.php
new file mode 100644
index 0000000..363f976
--- /dev/null
+++ b/src/MDConcSex.php
@@ -0,0 +1,35 @@
+<?PHP
+/**
+ * Constains lists for grouping sexes.
+ *
+ * @author Joshua Ramon Enslin <joshua@museum-digital.de>
+ */
+declare(strict_types = 1);
+
+/**
+ * Constains lists for grouping sexes.
+ */
+final class MDConcSex implements MDImporterConcordanceListInterface {
+
+    private const SEXES_LIST = [
+        'Männlich' => 'male',
+        'diverse' => 'other',
+    ];
+
+    /**
+     * Require a function for getting the concordance target.
+     *
+     * @param string $input Input string.
+     *
+     * @return string
+     */
+    public static function getConcordanceTarget(string $input):string {
+
+        if (!isset(self::SEXES_LIST[$input])) {
+            throw new MDImporterMissingConcordance("Unknown sex type: " . $input);
+        }
+
+        return self::SEXES_LIST[$input];
+
+    }
+}