report_gralsalesinvariant/report/informe_salesinvariantgral_view.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data>
        <record id="report_salegralsinvariant_tree_view" model="ir.ui.view">
            <field name="name">report.salegralvariant.tree.view</field>
            <field name="model">salegralsinvariant.report</field>
            <field name="priority" eval="20"/>
            <field name="arch" type="xml">
            <tree string="Analisis de ventas por producto/cliente" create="false">
					  <field name="id" invisible="1"/>
					  <field name="date"/>
					  <field name="partner_id" invisible="1"/>
					  <field name="product_id" string="Producto"/>
					  <field name="product_qty" sum="# of Qty" string="Cantidad"/>
            <field name="product_categ_id" string="Categoria"/>
				    </tree>
            </field>
        </record>

		    <record id="action_report_salegralsinvariant_tree_view" model="ir.actions.act_window">
            <field name="name">Analisis de ventas por producto/cliente</field>
            <field name="res_model">salegralsinvariant.report</field>
            <field name="view_type">form</field>
            <field name="view_mode">tree</field>
        </record>

        <menuitem action="action_report_salegralsinvariant_tree_view" id="menu_salesv" parent="base.next_id_64" sequence="11" />
	</data>
</openerp>