ir.property.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
  <data>
    <!-- The tuple we are registering is company, product_category, income_account -->
    <record forcecreate="True" id="property_account_income_categ"   model="ir.property">
      <!-- For all records, these are the same -->
      <field name="name">property_account_income_categ</field>
      <field name="fields_id"  search="[('model','=','product.category'),('name','=','property_account_income_categ')]"/>

      <!-- The company is different for each one obviously -->
      <field name="company_id" ref="res_company.UK"/>

      <!-- The value is the actual account
      -->
      <field eval="'account.account,'+str(ref('l10n_uk.4060'))" name="value"/>

      <!-- The resource is which category the account applies to:  -->
      <field eval="'product.category,'+str(ref('product.product_category_masters'))" name="res_id" />
    </record>
  </data>
</openerp>