<?xml version="1.0"?>
<form string="Product Attribute and Values">
                <group name="main_field">
                    <label for="attribute_id" string="Attribute Name"/>
                    <field name="attribute_id" nolabel="1"/>
                    <field name="value_ids" widget="one2many">
                        <list string="Values">
                            <field name="name"/>
                            <field name="html_color"/>
                        </list>
                        <form string="Values">
                            <field name="name"/>
                        </form>
                    </field>
                </group>
            </form>
        