Closed

When true, nodes in the focus set may carry ONLY the properties named by this shape's PropertyShape paths (plus any in ignoredProperties) — an undeclared property is a violation. The closed-world boundary check. Closedness is always evaluated over the EXPLICIT data scope the evaluator was given, never the ambient open world: what counts as "the statements about this node" is exactly the supplied scope, so an ingress payload is judged on its own statements and a pinned load-set on the merged statements of that set. Mirrors sh:closed.