Problems with archetype internal ref

Hi,

I’m trying to support Archetype Internal Refs on my degree thesis project but I think there is an error on the specs or on the oceans archetype Editor.

In the AOM specs, every CObject has a mandatory node_id attribute, included the ArchetypeInternalRef.
I make an archetype using Oceans Archetype Editor and the node with the reference looks like this:

CLUSTER[at0008] occurrences matches {0..1} matches { – Pelvis
items cardinality matches {0..*; unordered} matches {
use_node ELEMENT occurrences matches {0..3} /data[at0001]/events[at0002]/data[at0003]/items[at0004]/items[at0012]
}
}

But the use_node internal reference has no node_id.

Anyone one knows where is the problem?
Where can I set the intenal ref node_id?

Thanks a lot,
Pablo Pazos Gutierrez