sdd:toStencil
sdd:toStencil names the marker drawn at the to end of an sdd:Edge — the mirror of sdd:fromStencil, most commonly an arrowhead marking directionality (sdd:toStencil "arrow").
Like its counterpart, sdd:toStencil is per-end and template-mappable (examples decision 9): a diagram template can bind a fact predicate to a to-end stencil without the author choosing one by hand, and an edge with no sdd:toStencil simply draws its endpoint bare.