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hlink: A simple standard for addressing the nth link on a web page Keywords nthlink, link addressing, URI fragment, web automation, web scraping, accessibility, deep linking, navigation selector Description nthlink is a lightweight convention for referencing the nth hyperlink on a web page, enabling precise deep-linking, easier automation and testing, and improved semantic references for dynamic content. Content When people talk about linking, they usually mean a URL that points to a resource. But sometimes you want to point not to a resource in general, but to a specific link on a page — for example, “the third article listed on this news page” or “the second link in the navigation bar.” nthlink is a simple, practical convention for that purpose: a way to encode “point to the nth link” of a given page so humans and programs can navigate it deterministically. What nthlink does nthlink is not a full protocol; it’s a small addressing pattern that augments a normal URL with an ordinal indicator. There are multiple conceivable syntaxes — for example: - https://example.com/#nth=3 - nthlink://example.com?n=3 - https://example.com/?nthlink=3 The idea is the same: when a client (user agent, script or human) sees an nthlink address, it resolves the base page and then selects the nth matching anchor element (typically counting visible tags in DOM order). The client can then follow that link or highlight it for the user. Why nthlink matters 1. Precise references: Journalists, researchers and archivists often need to cite exactly which link they referenced on a list or directory page. nthlink makes that explicit. 2. Automation and scraping: Test scripts and scrapers can reference the nth item on a page without brittle CSS selectors that break with layout changes. 3. Accessibility and navigation aids: Screen readers or keyboard navigation tools can implement quick jumps to an indexed link. 4. Progressive enhancement: A client can degrade gracefully — if nthlink resolution fails because the page changed, it can fall back to opening the base URL. Implementation considerations - Counting rules must be specified: do we count only anchors with hrefs? Only visible ones? What about links injected by JavaScript? A robust implementation should default to visible anchors with non-empty href attributes and allow configurable filters (by CSS selector, text match, or ARIA attributes). - Dynamic content: Pages that reorder links asynchronously require the client to either wait for a stable DOM or use a server-side rendered snapshot to ensure consistent counting. - Canonicalization and privacy: Because nthlink points into the structure rather than content, the same ordinal may lead to different destinations over time. Applications should avoid using nthlink for permanent citations unless combined with content hashing or archival snapshots. Future and adoption nthlink can remain informal, implemented by browser extensions, testing tools (Selenium, Playwright), and bookmarklets. If standardized, browser vendors could expose a simple API to resolve nthlink addresses reliably. For now, nthlink offers a pragmatic pattern: a tiny, useful layer on top of URLs that helps people and machines point to exactly which link matters.