reporting-engine/report_xml/demo/report.xml

<?xml version="1.0" encoding="UTF-8" ?>
<odoo>
     <record id="demo_xml_report" model="ir.actions.report">
        <field name="name">Demo xml report</field>
        <field name="model">res.company</field>
        <field name="report_type">qweb-xml</field>
        <field name="report_name">report_xml.demo_report_xml_view</field>
        <field name="report_file">res_company</field>
        <!--
        In case of demo data next definition will not work. So it just example
        how it should look. If report is a part of demo data you will need
        add file to report instance via `post_install_hook`
        -->
        <field name="xsd_schema" type="base64" file="report_xml/demo/demo_report.xsd" />
    </record>
</odoo>