<?xml version="1.0" encoding="utf-8"?> <form> <field name="default_value" type="user" label="PLG_FIELDS_USER_DEFAULT_VALUE_LABEL" description="PLG_FIELDS_USER_DEFAULT_VALUE_DESC" /> <fields name="params" label="COM_FIELDS_FIELD_BASIC_LABEL"> <fieldset name="basic"> <field name="show_on" type="hidden" filter="unset" /> </fieldset> </fields> </form>