diff --git a/schema/mysql-migrations/upgrade_xxx.sql b/schema/mysql-migrations/upgrade_xxx.sql
new file mode 100644
index 00000000..304a7bd2
--- /dev/null
+++ b/schema/mysql-migrations/upgrade_xxx.sql
@@ -0,0 +1,15 @@
+CREATE TABLE director_datafield_category (
+  id INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
+  category_name VARCHAR(255) NOT NULL,
+  description TEXT DEFAULT NULL,
+  PRIMARY KEY (id),
+  UNIQUE KEY category_name (category_name)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+
+ALTER TABLE director_datafield
+  ADD COLUMN category_id INT(10) UNSIGNED DEFAULT NULL AFTER id;
+
+
+-- INSERT INTO director_schema_migration
+--  (schema_version, migration_time)
+--  VALUES (167, NOW());
diff --git a/schema/mysql.sql b/schema/mysql.sql
index bc1c7137..f8e9a734 100644
--- a/schema/mysql.sql
+++ b/schema/mysql.sql
@@ -179,8 +179,17 @@ CREATE TABLE director_datalist_entry (
     ON UPDATE CASCADE
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
+CREATE TABLE director_datafield_category (
+  id INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
+  category_name VARCHAR(255) NOT NULL,
+  description TEXT DEFAULT NULL,
+  PRIMARY KEY (id),
+  UNIQUE KEY category_name (category_name)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+
 CREATE TABLE director_datafield (
   id INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
+  category_id INT(10) UNSIGNED DEFAULT NULL,
   varname VARCHAR(64) NOT NULL COLLATE utf8_bin,
   caption VARCHAR(255) NOT NULL,
   description TEXT DEFAULT NULL,