account-financial-reporting/account_financial_report_qweb/reports.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data>

        <report
          id="action_report_general_ledger_qweb"
          model="report.account.report_generalledger_qweb"
          string="General Ledger"
          report_type="qweb-pdf"
          name="account.report_generalledger_qweb"
          file="account.report_generalledger_qweb"
          />

        <!--PaperFormat A4 internal open invoice-->

        <record id="open_invoice_report_format_a4_horizontal" model="report.paperformat">
            <field name="name">Open Invoice Report Internal A4 Horizontal</field>
            <field name="margin_top">30</field>
            <field name="margin_bottom">20</field>
            <field name="header_spacing">20</field>
            <field name="orientation">Landscape</field>
        </record>

        <!--report open invoice-->

        <report
            string="Open Invoice Report"
            id="action_open_invoice_report"
            model="open.invoice.wizard"
            report_type="qweb-pdf"
            name="account_financial_report_qweb.open_invoice_report_qweb"
            file="account_financial_report_qweb.open_invoice_report_qweb"/>
        <record id="action_open_invoice_report" model="ir.actions.report.xml">
            <field name="paperformat_id" ref="account_financial_report_qweb.open_invoice_report_format_a4_horizontal"/>
        </record>


    </data>
</openerp>