letter_sequence.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
  <data noupdate="1">

    <!-- Sequences for Internal Letter -->

    <record id="seq_type_letter_intern" model="ir.sequence.type">
      <field name="name">Internal Letter</field>
      <field name="code">intern.letter</field>
    </record>

    <record id="seq_intern_letter" model="ir.sequence">
      <field name="name">Internal Letter</field>
      <field name="code">intern.letter</field>
      <field name="prefix">INTERN/%(year)s/%(month)s/%(day)s/</field>
      <field name="padding">3</field>
    </record>


  </data>
</openerp>