`interface-definitions/policy_route.xml.in` includes the same XML definitions more then ocne.
Example:
```
<node name="source">
<properties>
<help>Source parameters</help>
</properties>
<children>
#include <include/firewall/address-ipv6.xml.i>
#include <include/firewall/source-destination-group-ipv6.xml.i>
#include <include/firewall/port.xml.i>
#include <include/firewall/geoip.xml.i>
</children>
</node>
#include <include/policy/route-common.xml.i>
#include <include/policy/route-ipv6.xml.i>
```
The contents of `#include <include/policy/route-ipv6.xml.i>` are a re-include of:
* `#include <include/firewall/address-ipv6.xml.i>`
* `#include <include/firewall/source-destination-group-ipv6.xml.i>`
* `#include <include/firewall/port.xml.i>`
Also for IPv6 IPv4 address-groups are imported.