Ok can we use validation in the xml view input fields?? 

Hi

Please try this example 

<record id="model_form" model="ir.ui.view">
    <field name="name">model.model.form</field>
    <field name="model">model.model</field>
    <field name="arch" type="xml">
        <form>
            <header>
                <button name="action_confirm" type="object"
                        string="Confirm"
                        states="draft"/>
</header>
</form>
</field>
</record>

Also define the action_confirm function inside the model .

Regards