sdd:subjectCopy as claim

sdd:subject names a sdd:Group's natural subject — the resource a grounded title datum line (one with a sdd:binds path) binds against. It defaults from an sdd:AllChildren intent's sdd:of; a sdd:Selection or intent-less group has none unless an explicit `subject <curie-or-iri>` line declares one.Copy as claim

A sdd:subject is never invented: if a group has no resolvable subject — no AllChildren intent and no explicit line — it can hold only aesthetic (pathless) content; a grounded datum line without a resolvable subject is a builder error, not a silently-omitted binding. sdd:subject also appears on a sdd:Suppression instance for a suppressed node, naming the node's own depicted subject — what was left out.Copy as claim