sdd:pinnedCopy as claim

sdd:pinned marks a reifier as an author pin — the RDF form of the ! operator (spec §4.2). Its subject is a reifier whose rdf:reifies names a quoted triple of exactly the overridden quad (for example the quad <#pipeline.load> sdd:at "260 40"^^sdd:vector); its object is "true"^^xsd:boolean, written {| sdd:pinned true |} as an RDF 1.2 annotation directly on that quad.Copy as claim

"Cache unless annotated" is the round-trip invariant this predicate exists to carry (examples decision 2): everything unannotated in the scene (V) and aesthetic (A) layers is machine-materialized and rewritten freely on recompute; a quad annotated sdd:pinned is an author override that survives. The serializer's rule for re-emitting ! reads directly off this annotation — annotated quads regenerate with the operator, bare quads regenerate unmarked.Copy as claim