She frowned, fingers tracing the film’s edge. It was a narrow slide, nothing like the old negatives her father used to develop. When she held it up to the light, an image resolved: a rusting bridge arching over a river choked with reeds. But something else flickered beneath the surface — a second layer that only showed when she tilted the slide: a silhouette of a woman standing under the bridge, hands raised as if cupping the air.
At its heart, . It is not a general term but the unique suffix of a DOI (Digital Object Identifier) . When combined with the standard DOI prefix, you get the permanent, direct link to the article: https://doi.org/10.1093/oq/kbi058 . kbi058 link