<xpath expr="//field[@name='year']" position="replace">
<field name="birthdate_date" attrs="{'required': [('is_company','=', False)]}"/>
</xpath>
<xpath expr="//field[@name='year']" position="replace">
<field name="birthdate_date" attrs="{'required': [('is_company','=', False)]}"/>
</xpath>
<xpath expr="//field[@name='year']" position="replace">
<field name="birthdate" attrs="{'required': [('is_company','=', False)]}"/>
</xpath>
<xpath expr="//field[@name='year']" position="replace">
<field name="birthdate" attrs="{'required': [('is_company','=', False)]}"/>
</xpath>