I'm customizing Invoice task window in odoo 9

My existing form

<record id="view_account_analytic_account_form" model="ir.ui.view">

<field name="name">analytic.analytic.account.form</field>

<field name="model">account.analytic.account</field>

<field name="arch" type="xml">

<form string="Analytic Account">

<sheet string="Analytic Account">

<field name="name" class="oe_inline" placeholder="e.g. Project XYZ"/>

<group>

<field name="account_type" invisible="1"/>

<field name="partner_id"/>

</group>

<group>

<field name="code"/>

<field name="tag_ids" widget="many2many_tags"/>

<field name="company_id"/>

<field name="currency_id"/>

</group>

</sheet>

</form>

</field>

</record>

Instead of above form I want to replace as below

<form string="Analytic Entry">

<sheet>

<group>

<group>

<field name="name" />

</group>

<group>

<field name="date" />

<field name="ref" />

<field name="company_id" groups="base.group_multi_company" />

</group>

<group string="Product Information">

<field name="product_id" domain="[('name_template','=','Service')]" />

<label for="unit_amount" />

<div>

<field name="unit_amount" class="oe_inline" />

<field name="product_uom_id" class="oe_inline" />

</div>

</group>

</group>

</sheet>

</form>

I tried with

 <xpath expr="//form[@string='Analytic Account']" position="replace" >

 <form>

<!-- my form view -->

</form>  </xpath>

 I don't want to replace my fileds I just want to replace my full form view by using id

can anyone please help me ?