policies placement

[MartinoMensio]

Policies should be placed inside each NFFG or stored apart? Read the javadoc

[MartinoMensio]

If policies are outside NFFG element, how to specify the keyref selector to src and dst? I would need to filter by using the correct NFFG (retrievable by name), because one NFFG has a different scope for node names and the keyref must refer to the right NFFG.

<xs:keyref name="policy_src_keyref" refer="node_key[@name=right_nffg_name]">
    <xs:selector xpath="policy/src" />
    <xs:field xpath="@ref" />
</xs:keyref>

But this is impossible (?) to do in practice.

Instead if the policy is kept inside the NFFG, the implementation is straightforward.

To follow exactly the specifications, I only need to make a global scope for policy names. This has to be done in order to deny the existence of two policies with same name, also if they belong to different NFFGs.

[MartinoMensio]

I leave the policies inside the nffg element. This reduces data redundacy, since the name of the nffg elements does not need to be repeated inside the policies. I only need to move the key up in the root scope