Adding Custom Attributes to Plugin: Brand, MPN, GTIN, Google Product Category Forums › Product XML Feeds for WooCommerce › Adding Custom Attributes to Plugin: Brand, MPN, GTIN, Google Product Category Support forum for the WooCommerce Product XML Feeds Manager. This topic has 0 replies, 1 voice, and was last updated 7 years, 5 months ago by uneeb. You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In