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As datasets grow and decentralize, simple direct links are no longer enough to represent the complex relationships that power search, recommendation, identity, and analytics. NthLink introduces a disciplined way to represent and work with nth-degree — or multi-hop — connections between entities across heterogeneous systems. Rather than being a single standard, NthLink is a set of ideas and practices for expressing transitive links, capturing provenance, and enabling efficient queries across multiple hops. At its core, NthLink distinguishes between direct links (one hop) and derived or transitive links (two or more hops). A transitive link might express that Alice is professionally connected to Carol because Alice works with Bob and Bob mentors Carol. Representing that relationship explicitly — and with provenance that shows the path through Bob — lets applications surface meaningful connections without obscuring how they were inferred. Key components of an NthLink approach include: - Link metadata: every NthLink carries provenance (which hops were used), confidence or score (how reliable the inference is), and context (time, dataset versions, transformation rules). - Query primitives: language features or APIs that let clients request NthLinks up to a specified depth, filter by path patterns, or aggregate link-derived metrics. - Privacy and policy controls: mechanisms to enforce permissions at both node and hop levels, preventing unauthorized traversal or exposure of sensitive intermediate relationships. - Performance techniques: indexing strategies, path caching, and probabilistic summaries to make multi-hop queries efficient on large graphs. Use cases span many domains. In knowledge graphs, NthLink helps build richer concept relationships for question answering and discovery. In social platforms, it powers trust and referral systems that reason about mutual connections. In supply chain and provenance tracking, NthLink enables tracing products through multiple intermediary steps while preserving audit trails. In federated identity and access control, it supports policies that depend on transitive membership or affiliations. Challenges are practical and conceptual. Enumerating all possible paths can be computationally expensive and may amplify noise or spam in noisy datasets. Deciding when to materialize transitive links versus computing them on demand affects storage and freshness trade-offs. Governance — who can assert, publish, or prune NthLinks — is critical to prevent misleading or malicious inferences. Looking ahead, NthLink ideas can be integrated with semantic web standards, graph databases, and decentralized identifiers to create interoperable ecosystems. By making multi-hop relationships first-class, NthLink promises more expressive, explainable, and actionable connections across the web of data.