real_estate_base/data/top_sequence.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
<data noupdate="1">
    
    <record id="seq_type_real_estate_top" model="ir.sequence.type">
        <field name="name">Real Estate Code</field>
        <field name="code">real.estate.top</field>
    </record>
    <record id="real_estate_top_seq" model="ir.sequence">
        <field name="name">Real Estate Code</field>
        <field name="code">real.estate.top</field>
        <field name="number_next">1</field>
        <field name="padding">6</field>
    </record>

</data>
</openerp>