Document deterministic entity identity resolution

docs/integrations/dnd-item-registry-artifacts.md

@@ -85,9 +85,10 @@ for later artifacts.
 
 `dnd/item-occurrences` requires one approved item registry through its
 `item_registry` reference slot for both extraction and normalization. Its
-consumer receives only an ordered, source-free `{id,name}` projection; the
-registry’s source references are never occurrence evidence. Unknown IDs and
-mismatched pairs are rejected by the occurrence contract. See the
+consumer receives names-only grounding; Notarius resolves the selected name
+into the unchanged exact durable ID/name pair. The registry’s source references
+are never occurrence evidence. Unknown or ambiguous selections are rejected by
+the occurrence contract. See the
 [item-occurrence artifact](dnd-item-occurrence-artifacts.md) for that strict
 wire contract, [Configuration](../config.md#d-d-reference-slots) for binding
 rules and validator selection, and the [JSON output contract](json-output.md)