sdd:toCopy as claim

sdd:to points an sdd:Edge at the scene instance it terminates at — the mirror of sdd:from. Its object is a sdd:Node today, extended to Ports in later plans exactly as sdd:from is.Copy as claim

Together sdd:from and sdd:to name the two endpoints an edge connects; sdd:toAnchor then names where on the sdd:to instance's boundary the connection lands, and sdd:toStencil names any marker drawn there (spec §4.4).Copy as claim