Added a migration to add type column and exposed it

migrations/041-add-tag-column-type.js

@@ -0,0 +1,19 @@
+let db = require('../src/db').sequelize;
+
+module.exports = {
+  up: function() {
+    try {
+      return db.query(`
+        ALTER TABLE tags ADD type VARCHAR(30) NULL DEFAULT NULL AFTER name;`);
+    } catch(e) {
+      return true;
+    }
+  }, down: function() {
+    try {
+        return db.query(`
+        ALTER TABLE tags DROP IF EXISTS type;`);
+      } catch(e) {
+        return true;
+      }
+  }
+}

src/models/Tag.js

@@ -20,6 +20,14 @@ module.exports = function( db, sequelize, DataTypes ) {
 			}
 		},
 
+		type: {
+			type         : DataTypes.STRING,
+			allowNull    : true,
+			set          : function( text ) {
+				this.setDataValue('type', sanitize.safeTags(text.trim()));
+			}
+		},
+
 		extraData: getExtraDataConfig(DataTypes.JSON, 'tags')
 	}, {