Hi !
In v7, you could do:
<record id="base.main_company" model="res.company">
<field name="name">Your New Company</field>
<field name="partner_id" ref="main_partner"/>
<field name="rml_header1">Your New Company Tagline</field>
<field name="currency_id" ref="base.EUR"/>
</record>
But in v8 you can't. Any other way doing this ?